Workhorse Chassis--Body Electrical Wiring Manual

Transcription

Body
Wiring
Manual
Aeromaster on
Workhorse Chassis
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2
Aeromaster on Workhorse ChassisBody Wiring Manual
Part Number: 03102354-WY00EN
Revision Control
Revision
Print Date
Rev. A
April 2003
Important Notices
©2003, Utilimaster.®
Printed in U.S.A.
Title: Aeromaster on Workhorse ChassisBody Wiring Manual
Utilimaster Corporation attempts to provide information that is accurate, complete, and useful. All
information contained in this manual is based on the latest product information available at the time of
publication. However, because of the Utilimaster policy of continual product improvement, Utilimaster
reserves the right to amend the information in this document at any time without prior notice. Should
you find inadequacies in the text, please send your comments to the following address:
Utilimaster
Attn: Designer of Technical Publications
65906 State Road 19, P.O. Box 585
Wakarusa, Indiana, 46573-0585 U.S.A.
NOTE: When phoning Utilimaster, be aware that our
219 telephone area code changed to 574 in January
2002. The 800 numbers were unaffected.
This material is confidential and the property of Utilimaster. It is shared with your company for the sole
purpose of helping you with the operation of the described equipment.
Utilimaster makes no warranty of any kind with regard to this material, including, but not limited to, the
implied warranties of merchantability and fitness for a particular purpose. Utilimaster shall not be liable
for errors contained herein or for incidental or consequential damages in connection with the furnishing,
performance, or use of this material.
Utilimaster expressly disclaims all responsibility and liability for the installation, use, performance,
maintenance, and support of third-party products. Customers are advised to make their independent
evaluation of such products.
No part of this document may be photocopied, reproduced, or translated to another language without the
prior written consent of Utilimaster.
Utilimaster® and Aeromaster® are registered trademarks of Utilimaster Corporation. All other trademarks are products of their respective companies.
Browse the web site www.utilimaster.com for more information about Utilimaster and its products.
3
Contents
Introduction ................................................................................................................................ 6
Finding Information..................................................................................................................... 7
VIN Number................................................................................................................................ 7
Body Serial Number ................................................................................................................... 7
Safety Considerations ................................................................................................................ 8
General Warnings ................................................................................................................. 8
Disconnecting the Battery ..................................................................................................... 9
Reporting Safety Defects (U.S. Only) ......................................................................................... 9
More Information ...................................................................................................................... 10
Utilimaster Quick Reference Parts Guide ........................................................................... 10
Utilimaster Body on Workhorse Chassis Parts Manual....................................................... 10
Utilimaster Glossary of Terms ............................................................................................. 10
Utilimaster Body Service Manual ........................................................................................ 10
Download Files ................................................................................................................... 10
Contact Utilimaster .............................................................................................................. 10
Wiring Diagrams ....................................................................................................................... 11
1Wire Color Code and Symbol Key ................................................................................. 11
2Connectors .................................................................................................................... 12
Cummins ISB4 Diesel Only ........................................................................................... 12
Standard ........................................................................................................................ 13
3Harness Layout (Connector Locations) ......................................................................... 18
4Power Distribution ......................................................................................................... 19
5Grounding System......................................................................................................... 20
6Switches ........................................................................................................................ 21
7Cargo Lamps ................................................................................................................. 22
Standard ........................................................................................................................ 22
Switch on Dash ............................................................................................................. 23
Three-Way Switch ......................................................................................................... 24
8Wiper System ................................................................................................................ 25
Standard and Cummins ISB4 Intermittent ..................................................................... 25
Intermittent Option (Non-Cummins ISB4) ...................................................................... 26
4
9Heater Only System ...................................................................................................... 27
Cable Controls ............................................................................................................... 27
Electronic Controls ........................................................................................................ 28
9HVAC System................................................................................................................ 29
Cable Controls ............................................................................................................... 29
Electronic Controls ........................................................................................................ 30
10Chassis Supplied A/C Prep ......................................................................................... 31
11Front Light Wiring ........................................................................................................ 32
With Cummins ISB4 Diesel Engines ............................................................................. 32
Without Daytime Running Lights ................................................................................... 33
Daytime Running Lights (Domestic) .............................................................................. 34
Daytime Running Lights (Canadian) .............................................................................. 35
12Rear Light Wiring......................................................................................................... 36
Standard ........................................................................................................................ 36
Routed through Interior.................................................................................................. 37
Split Taillights ................................................................................................................. 38
Split Taillights Routed through Interior ........................................................................... 39
13Roof Wiring ................................................................................................................. 40
14Clearance Lights ......................................................................................................... 41
15Panel Lights (HVAC Control Panel) ............................................................................. 42
16Stereo System ............................................................................................................. 43
17Door Ajar System ........................................................................................................ 44
18Supplemental High Mount Stop Lamp (SHMSL) ......................................................... 45
19Accessory Outlet (Cigarette Lighter) ........................................................................... 46
20Cab Dome Light .......................................................................................................... 47
21Dash Fan ..................................................................................................................... 48
22Power Vent .................................................................................................................. 49
23Heated Mirrors ............................................................................................................. 50
24Auxiliary Heater ........................................................................................................... 51
25Spotlight or Strobe Light .............................................................................................. 52
Index ........................................................................................................................................ 53
5
Introduction
This manual illustrates electrical wiring diagrams for Aeromaster® walk-in
bodies on the P-3 Series Workhorse strip chassis (Model Years 1999 and later)
and the P-3 Series Chevrolet and GMC strip chassis (Model Years built from
1996 through 1998). Whether your truck is based on GMC, Chevrolet, or
Workhorse chassis, the majority of information is interchangeable by design and
are all referred to as the Model 33.
Some configurations, however, depend on the chassis engine option. The four-cylinder Cummins diesel
with electronic fuel injection (ISB4) engine has the most unique wiring variations, which is noted
throughout this manual. The four-cylinder Cummins diesel with manual fuel injection (4BT) engine is
not specified because it uses the standard wiring configurations. The eighth digit in the VIN Number
identifies the engine code (P for the ISB4 or L for the 4BT) but typically the ISB4 engine block is
painted black while the 4BT is tan in color. (See also the chart below and the VIN Number section on
the next page.)
Workhorse Vehicle Identification Number (VIN) Codes
Code Position
Definition
8 (of 17)
Engine
Character
R
W
Y
F
L
P
Description
5.7 V8
4.3 V8
6.5 V8 Diesel Naturally Aspirated
6.5 V8 Diesel Turbo
4.9 4BT Diesel Manual
4.9 ISB4 Diesel Electronic
This manual covers only those components manufactured by or installed by Utilimaster® Corporation.
Items such as chassis and drive train components or certain interior options are covered by separate
manufacturer-supplied information. Not all options are included in this manual and some part numbers
have changed from previous model years.
If your vehicle is equipped with a VACS system, supplementary information is in Vehicle Access
Controls System for Utilimaster Walk-In Vans Operation and Service Manual (P/N 03102103). To order
that manual, call 800-237-7806 (574-862-3219), fax 574-862-7637, or email
[email protected].
All information, specifications, and illustrations contained in this manual are based on the latest product
information available at the time of publication. However, because of the Utilimaster policy of continual
product improvement, Utilimaster reserves the right to amend the information in this document at any
time without prior notice.
6
Finding Information
The Contents lists sections (and their respective pages) containing wiring diagrams and other
information. The Index lists pages on which the indexed topics can be found.
Sheet numbers indicated by last two digits in the drawing number (lower right-hand corner of the
drawing when viewed at the normal viewing angle) refer to the engineering drawing page numbers but
are not in numerical order. These numbers are not meant to match the manual section or page numbers.
NOTE: If you are using the Adobe Acrobat version of this document printing out pages
for detailed study is recommended because of the 90° rotation of the diagrams. Printing
individual pages or a range of pages from the Acrobat Reader is easily accomplished by
selecting File, Print, and then the desired print range.
VIN Number
The chassis 17-digit Vehicle Identification Number (VIN) is the
legal identifier for this vehicle and is the number recorded in the
license plate registration. The VIN appears on a small metal plate in
the front corner of the dash on the drivers side, and you can read the
VIN by looking through the windshield. The VIN is also recorded on
the Federal Certification Label.
VIN Tag
Body Serial Number
The 15-digit Utilimaster Body (or Unit) Serial Number is recorded on the Federal Certification Label.
This label is a plastic decal (about 11" long and 2" high) that contains a variety of manufacturing information (including the VIN). This label is near the top of the door frame between the drivers side
window and the quarter-panel window.
You will need the VIN or the Body/Unit Serial Number to order parts and make warranty claims.
Federal Certification Label
7
Safety Considerations
General Warnings
The following list contains some general WARNINGS that you should follow when you work on a
vehicle.
8
·
Be sure that the ignition switch is always in the OFF position, unless otherwise required by the
procedure. For circuits that are not controlled by the ignition switch (e.g., lights), disconnect
the negative terminal on the battery. (See instructions on the next page.)
·
Even though the ignition is in the OFF position, an electric radiator fan can start to operate at
any time by an increase in under-hood temperatures. Make sure the radiator fan is completely
disconnected when working under the hood.
·
Always wear safety glasses for eye protection.
·
Use safety stands whenever a procedure requires you to be under the vehicle.
·
Set the parking brake when working on the vehicle and if the vehicle has an automatic transmission, put the transmission in PARK.
·
Operate the engine only in a well-ventilated area to avoid the danger of carbon monoxide.
·
Keep yourself and your clothing away from moving parts when the engine is running, especially the fan and belts.
·
To prevent serious burns, avoid contact with hot metal parts such as the radiator, exhaust
manifold, tail pipe, catalytic converter, and muffler.
·
Do not smoke while working on the vehicle.
·
To avoid injury, always remove rings, watches, loose hanging jewelry, and loose clothing
before beginning to work on a vehicle. Tie long hair securely behind your head.
·
Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose,
and throat. To remove R-134a from the A/C system use service equipment certified to meet the
requirements of SAE J2210 (R-134a recycling equipment). IF accidental system discharge
occurs, ventilate work area BEFORE resuming service. Additional health and safety information may be obtained from refrigerant and lubricant manufacturers.
Disconnecting the Battery
The battery is located underneath a step in the righthand stepwell.
1. Make sure the ignition switch is Off.
2. Unhook or unscrew the latches and flip up the
battery panel (or remove the access cover) on
the right-hand stepwell.
3. Disconnect the battery negative (black) cable.
Reporting Safety Defects (U.S. Only)
If you believe that your vehicle has a defect that could cause a crash, injury, or death, you should
immediately inform the National Highway Traffic Safety Administration (NHTSA), in addition to
notifying Utilimaster.
If NHTSA receives similar complaints, it may open an investigation, and if it finds that a safety defect
exists in a group of vehicles, it may order a recall and remedy campaign. However, NHTSA cannot
become involved in individual problems between you, your dealer, or Utilimaster.
To contact NHTSA, you may either call the Auto Safety Hotline toll-free at 1-800-424-9393; in the
Washington, D.C., area call 202-366-0123 or write to:
NHTSA
U.S. Department of Transportation
400 Seventh Street
Washington, DC 20590
You can also obtain other information about motor vehicle safety from the Hotline.
9
More Information
Utilimaster Quick Reference Parts Guide
Easily find commonly replaced parts for most Utilimaster vehicles in the
Utilimaster Quick Reference Parts Guide. This illustrated document includes
part numbers for bumpers, door hardware, electrical components, window glass,
heater, air conditioner, hood, mirrors, sun visors, vents, mud flaps, roll-up door
parts, seats, wiper, and many other parts. It also includes sealants, window
replacement, and other repair kits.
Utilimaster Body on Workhorse Chassis Parts Manual
Find parts specific to Utilimaster bodies mounted on GM, GMC, Chevy, or
Workhorse chassis in the Aeromaster on Workhorse ChassisBody Parts
Manual.
Utilimaster Glossary of Terms
If you are not familiar with some of the terminology used in this manual, you
can find many Utilimaster and industry associated terms and definitions in the
Utilimaster Glossary of TermsBody Information Guide.
Utilimaster Body Service Manual
Read about routine maintenance procedures, troubleshooting, proper adjustment
methods, vehicle repair, aftermarket upgrades, and much more in the Utilimaster
VehiclesBody Service Manual.
Download Files
Many support documents are downloadable (as Adobe® Acrobat® PDF files)
from our web site at www.utilimaster.com. Click on the Technical Manuals
button, to access the download page. To view the files you must have the Adobe
Acrobat Reader version 3.0 or higher installed on your computer. Acrobat
readers are available free for all leading computer operating systems on the
Adobe web site (www.adobe.com).
Contact Utilimaster
Browse our site for more information about Utilimaster and its products or
contact Utilimaster Customer Service by using one of the following methods:
Call 800-237-7806 (or 574-862-3219).
Fax to 574-862-7637.
Email to [email protected].
Mail to the following address:
Utilimaster
Attn: Customer Service Department
NOTE: When phoning Utilimaster, be aware that
65528 State Road 19
our 219 telephone area code changed to 574 in
P.O. Box 585
January 2002. The 800 numbers were unaffected.
Wakarusa, IN 46573-0585 U.S.A.
10
C100
18 - 18GA
16 - 16GA
14 - 14GA
12 - 12GA
C101
A
A
CAVITY
IDENTIFICATION
CONTINUE TO
ANOTHER SHEET
CONTINUED FROM
ANOTHER SHEET
CONTINUED WITH NO
NUMBER ASSIGNED
120 OR
WIRE GUAGE CHART:
CONNECTOR
NUMBER
CONNECTOR
SYMBOL
- WIPER POWER
510 BK/WT - GROUND
Wiring Diagrams
BK - BLACK
BR - BROWN
DB - DARK BLUE
DG - DARK GREEN
GY - GRAY
LB - LIGHT BLUE
LG - LIGHT GREEN
OR - ORANGE
PK - PINK
RD - RED
YL - YELLOW
VT - VIOLET
WT - WHITE
GROUNDED TO BODY
1Wire Color Code and Symbol Key
WIRE COLOR CODE:
SPLICE
820 DG 16 - LOW SPEED
830 RD 16
- HIGH SPEED
840 GY 16 - PARK
890 VT 18
- WASHER PUMP
CONNECTOR NUMBER
C100
COWL CONNECTOR
12020991
CONN. DESCRIPTION
CONN. PART NO.
500 BK 14
WIRE GAUGE SIZE
WIRE COLOR
11
CIRCUIT NUMBER
NOTES:
1) All connectors are shown in the load (wire lead insertion) position.
2) Special customer options may not be covered by these diagrams.
3) WIRE COLORS ON SOME OPTIONAL EQIPTMENT MAY VARY FROM
THIS DOCUMENT.
Cover page Diagram 58231015a01 SHEET 1
500A BK 16
3 2 1
6 5 4
9 8 7
12 11 10
15 14 13
230 BN 18
350 BK/PK 18
1
120 OR 16
840 GY 16
280 LB/RD 18
890 VT 18
3
6
9
700 DB/WT 12
234 RD 16
2
5
8
120 OR 16
1
4
7
820 DG 16
180A PK 16
520 BK 16
150 RD 14
350 BK/PK 18
200 DB 16
A
G
A B
A
A B
E
F
B
C
D
520 BK 16
830 RD 16
500B BK 16
130B RD 14
C112
CHASSIS
POWER
FEED
2
3
C110
CHASSIS
POWER
FEED
BATTERY
POWER
820 DG 16
840 GY 16
4
DOME
LIGHT
5
DOOR
AJAR
WIPER
C108
130 RD 14
500 BK 14
830 RD 16
180 PK 16
500C BK 18
A B C D E F
A B C D E F
D
1
280 LB/RD 18
840 GY 16
170 RD 12
A B
A
E
C
170 RD 12
820 DG 16
B
120A OR 16
700 DB/WT 12
234 RD 16
5
3
2
4
230 BN 18
180B PK 18
110 PK/BK 12
6
7
POWER
ACCESSORY
C207
WIPER MOTOR
P/N 12065158
8
9
HIGH
MOUNT
STOP
LIGHT
INTERIOR
LIGHTING
NOTE: If the eighth digit in the VIN number is P, the vehicle has the Cummins ISB4 diesel engine. These connectors replace those of the equivalent standard connectors.
10
(No equivalent exists in
the standard wiring)
IGNITION
RELAY
ISB4 Connectors - Diagram 16513321b Sheet 2
2Connectors
130A RD 14
890 VT 18
200 DB 16
830 RD 16
110 PK/BK 12
Cummins ISB4 Diesel Only
NOTE: These connectors
are specific to vehicles
with the Cummins ISB4
diesel engine. These
replace the standard
connectors on the following pages (see large
circled numbers). For
vehicles without the ISB4
engine, see only the
following pages. To
identify the engine of a
vehicle, see page 6.
12
150 RD 14
120 OR
120 OR
170 RD
234 RD
710 DG
700 DB/WT
890 VT
710 DG
110 PK/BK
A
255 DB
C
830 RD
B
R
Q
236 LG
P
D
238 YL
O
V
S
U
T
E
P
G
H
K
I
J
231 BR/WT
350 BK/PK
110 PK/BK
2
1
6
5
4
9
8
7
12
11
10
15 14
U
E
180 PK
F
K
H
J
I
3
2
1
6
5
4
9
8
7
280 LB/RD
700 DB/WT
234 RD
231 BR/WT
234 RD
710 DG
13
4
5
6
7
8
9
180 PK
510 BK/WT
510 BK/WT
C111
POWER FEED #1 CAP
770028-1
ISB4
2
239 DB (DRL UNITS ONLY)
235 YL
233 DG
170 RD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
240 LG/BK
233 DG
500 BK
A
700 DB/WT
D
350 BK/PK
230 BR
15
3
820 DG
150 RD
280 LB/RD
2
520 BK
820 DG
C110
POWER FEED #1 PLUG
770021-1
110 PK/BK
1
520 BK
G
820 DG
840 GY
120 OR
C101
COWL CONNECTOR
12020005
150 RD
3
V
T
510 BK/WT
510 BK/WT
C100
COWL CONNECTOR
12020991
510 BK/WT
840 GY
830 RD
200 DB
840 GY
258 LB/WT
170 RD
S
232 DG
230 BR
820 DG
890 VT
200 DB
120 OR
830 RD
C
D
L
257 LB
B
M
L
840 GY
Q
890 VT
830 RD
N
M
253 DB/WT
A
O
N
F
R
B
242 RD/BK
230 BR
230 BR
E
235 YL
C
240 LG/BK
242 RD/BK
F
E
D
C
B
A
236 LG
232 DG
130 RD
C112
POWER FEED #2 (PLUG)
770023-1
ISB4
130 RD
C113
POWER FEED #2 (CAP)
770030-1
1
230 BR
500 BK
B
E
C
233 DG
500 BK
233 GY
A
D
D
B
E
E
C
C
240 LG/BK
242 RD/BK
13
C202
RT HEADLAMP FEED
12065158
B
500 BK
242 RD/BK
C203
RT HEADLAMP DIST
12034342
C200
FORWARD LAMP FEED
12015799
UNITS BUILT AFTER 03/31/97
230 BR
230 BR
A
240 LG/BK
C200
FORWARD LAMP FEED
12034342
UNITS BUILT BEFORE 03/31/97
238 YL
240 LG/BK
235 YL
A
D
242 RD/BK
C204
LT HEADLAMP FEED
12065158
UNITS W/O DAYTIME RUNNING LIGHTS
Connectors
- Diagram 58231008a Sheet 2
2Connectors
Standard
NOTE: These
connectors are
standard to all
vehicles except
those with the
Cummins ISB4
diesel engine.
For the connectors on the
following
pages that are
marked with a
large circled
number, see
the replacement on page
12. For
vehicles
without the
ISB4 engine,
ignore page
12. To identify
the engine of a
vehicle, see
page 6.
890 VT
500 BK
242 RD/BK
242 RD/BK
240 LG/BK
235 GY
A
D
500 BK
B
230 BR
235 GY
E
C
500 BK
240 LG/BK
230 BR
F E D C B A
235 YL
F
E
D
C
B
B
A
A
240 LG/BK
242 RD/BK
890 VT
C205
LT HEADLAMP DIST
12034342
C204
LEFT HEADLAMP FEED
12010975
UNITS W/O DAYTIME RUNNING LIGHTS
C205
LEFT HEADLAMP DIST
12015799
UNITS W/ DAYTIME RUNNING LIGHTS
UNITS W/ DAYTIME RUNNING LIGHTS
C206
WASHER PUMP
480115-1
500 BK
830 RD
820 DG
280 LB/RD
710 DG
510 BK/WT
A
D
A
C
110 PK/BK
A
C209
A/C JUMPER
12015791
C208
WIPER MOTOR (STD)
12015791
7
500 BK
8
7
1
4
254 DG
280 LB/RD
258 LB/WT
150 RD
6
C302
AUXILIARY SW (IGNITION)
999-16716.001
1
4
222 YL/BK
B
6
8
1
7
4
257 LB
280 LB/RD
253 DB/WT
110 PK/BK
530 BK
8
7
1
4
255 DB
3
C210
DRL (DAYTIME RUNNING)
12015792
C301
AUXILIARY SW (BATTERY)
999-16716.001
500 BK
4
280 LB/RD
3
2
1
3
7
3
ISB4
500 BK
8
220 YL
A
120 OR
C207
WIPER MOTOR (STD)
12015798
256 DG/WT
224 YL/WT
150 RD
B
840 GY
280 LB/RD
240 LG/BK
242 RD/BK
6
C303
AUXILIARY SW (BATTERY)
999-16716.001
3
700 DB/WT
1
710 DG
710 DG
2
280 LB/RD
700 DB/WT
3
530 BK
500 BK
254 YL
D
C
A
B
256 RD
4
6
C304
AUXILIARY SW (IGNITION)
999-16716.001
C330
HVAC CONN.
770019-1
C331
HVAC CONN. (SCS)
770209-1
C340
AUX. HTR (SCS)
12015024
Connectors - Diagram 58231008a Sheet 3
2Connectors
239 DB
500 BK
Standard (continued)
14
239 DB
230 BR
224 YL/WT
222 YL/BK
200 DB
1
520 BK
350 BK/PK
150 RD
2
4
5
6
7
8
9
10
11
12
13
14
15
231 BR/WT
231 BR/WT
3
254 DG
520 BK
254 DG
256 DG/WT
258 LB/WT
258 LB/WT
500 BK
2
1
6
5
4
9
8
7
12 11
10
15 14
13
350 BK/PK
520 BK
254 DG
256 DG/WT
258 LB/WT
150 RD
500 BK
1
5
4
9
8
350 BK/PK
10
15 14
13
C415
"A" PILLAR (ROOF)
MOLED CONN.
4
5
6
8
9
150 RD
10
11
12
234 RD
13
14
15
C413
"A" PILLAR (ROOF)
770029-1
232 DG
238 YL
236 LG
1
4
4
2
5
5
2
3
6
6
3
500 BK
C418
INTERIOR ROUTED
REAR LIGHTING
770020-1
231 BR/WT
3
257 LB
234 RD
236 LG
2
7
C412
"A" PILLAR (PILLAR)
770022-1
238 YL
230 BR
1
520 BK
256 DG/WT
232 DG
231 BR/WT
200 DB
7
12 11
257 LB
234 RD
C414
"A" PILLAR (ROOF)
MOLDED CONN.
2
6
500 BK
C411
"A" PILLAR (PILLAR)
770022-1
231 BR/WT
3
200 DB
180 PK/BK
234 RD
257 LB
C410
"A" PILLAR (DASH)
770029-1
231 BR/WT
200 DB
180 PK/BK
180 PK
234 RD
3
220 YL
222 YL/BK
222 YL/BK
224 YL/WT
1
230 BR
ISB4
ISB4
9
9
500 BK
C419
INTERIOR ROUTED
REAR LIGHTING
770027-1
520 BK
890 VT
830 RD
120 OR
820 DG
180 RD
C500
FUSEBLOCK (LPS-GM)
12004884
A
ISB4
6
C501
FUSEBLOCK (ACCY)
12004888
A
ISB4
C503
FUSEBLOCK (PWR)
12004883
6
A
C504
FUSEBLOCK (AUX)
12004740
A
200 DB
150 RD
700 DB/WT
110 PK/BK
170 RD
280 LB/RD
A
231 BR/WT
840 GY
A
ISB4
6
C506
FUSEBLOCK (HTR)
12004885
A
ISB4
3
C507
FUSEBLOCK(BATT)
12004886
A
B
C
D
E
C510
WIPER SWITCH
12010429
F
G
ISB4
4
C511
CLEARANCE LIGHT FEED
12015952
STANDARD APPLICATION
SEE ALSO 16513321b FOR THE 4BT CUMMINS
15
2Connectors
224 YL/WT
220 YL
220 YL
220 YL
20 LB
(STOP ONLY)
230 BR
234 RD
E
F
E
D
A
F
C
A
C
G B
G B
24 LG
(BACKUP)
500 BK
A
232 GY
D
C
500 BK
B
232 GY/234 RD
C635
RT STOP/TURN/TAIL
MOLDED CONN.
C634
LT REAR LAMP DIST
12065158
B
C
238 GY/ 234 RD
C637
LT STOP/TURN/TAIL
MOLDED CONN.
234 RD
500 BK
B
236 LG
C636
RT BACK-UP LAMP
MOLDED CONN.
230 BR
C633
LT REAR LAMP FEED
12034342
C
C
D
230 BR
500 BK
230 BR
A
B
C
C
234 RD
C632
RT REAR LAMP DIST
12065158
500 BK
A
234 RD
A
E
E
C
D
230 BR
C631
RT REAR LAMP FEED
12034342
B
B
A
D
230 BR
236 LG
238 YL
C
234 RD
230 BR 18
236 LG
A
E
E
500 BK
238 GY
B
B
C622
LICENSE PLATE LAMP
12010996
500 BK
236 LG
232 DG
A
A
C621
LICENSE PLATE LAMP
12010996
500 BK
236 LG
C623
LICENCE PLATE LAMP
12010996
A
C620
LICENSE PLATE LAMP
12010996
C611
GM REAR LAMP FEED
12110753
230 BR
230 BR
18 YL
(LT TURN/STOP)
238 YL
C610
REAR LAMP DIST
12110751
230 BR
A
19 DG
(RT TURN/STOP)
232 DG
236 LG
230 BR
9 BR
(TAIL)
D
236 LG
C638
LT BACK-UP LAMP
MOLDED CONN.
2Connectors
16
150 BK
(GROUND)
350 BK/PK
234 RD
B
B
A
A
C645
STOP LAMP FEED
12077412
C642
LT REAR TURN LAMP
MOLDED CONN.
500 BK
240 LG/BK
240 LG/BK
A
ISB4
238 GY
C641
RT REAR TURN LAMP
MOLDED CONN.
A
B
A
232 GY
500 BK
ISB4
8
C
5
C661
DOOR AJAR
12077412
239 DB
242 RD/BK
C710
RT RECT. INCAD. HDLP
12077384
240 LG/BK
240 LG/BK
240 LG/BK
242 RD/BK
500 BK
500 BK
239 DB
A
ABC
C
C
A
B
500 BK
230 BR
ABC
C
230 BR
242 RD/BK
242 RD/BK
B
ABC
B
C711
LT RECT. INCAD. HDLP
12077384
C710
RT HALOGEN HDLP
12048369
500 BK
B
A
C
C
233 GY
242 RD/BK
2Connectors
240 LG/BK
500 BK
500 BK
235 GY
242 RD/BK
C711
LT HALOGEN HDLP
12048369
C711
LT RECT. INCAD. HDLP
W/DRL
12077384
C711
LT HALOGEN HDLP
12048369
C712
RT FRONT TURN LAMP
MOLDED CONN.
C713
LT FRONT TURN LAMP
MOLDED CONN.
231 BR/WT
230 BR
233 GY
235 GY
230 BR
231 BR/WT
87
B
A
B
86
A
500 BK
87a
85
30
170 RD
17
C714
RT FRONT SDMRKR LAMP
MOLDED CONN.
C715
LT FRONT SDMRKR LAMP
MOLDED CONN.
C720
CLEARANCE LIGHT RELAY
3-334-485-007
TO
SCS
WIRING
CIG
LTR
C331
CLR
LTS
C720
WIPER
C510
FUSE
BLOCK
C500-C507
C112
C330
C304
C303
PWR
FEED
DASH
SWITCHES
C302
C116
QTR
C113
PST
PWR
C111
FEED
CLRC
LT
C110
CLRC
LT
CLR
C511 LTS
C301
CLRC
LT
CLRC
LT
CLRC
LT
POWER FEED HARNESS
CLRC
LT
GROUNDS
ROOF TO REAR STRUCTURE
CONNECTION(NO CONN. #'S)
C641
MAIN HARNESS
C100
COWL
C635
CARGO
LIGHT
CLRC
LT
C636
VIEW-AA
(UNDER DASH)
C642
C637
CARGO
LIGHT
C632
C621
C631
C638
C620
DOME
LIGHT
CLRC
LT
BACKUP
ALARM
C633
C611
C634
C610
CLRC
LT
CLRC
LT
CLRC
LT
CLRC
LT
C415
C414
C202
C203
VIEW-AA
C413
C412
C419
C418
C411
C207
C208
C206
C209
C710
C101
C210
C714
C204
C712
C200
C205
C711
C713
C715
Harness Layout - Diagram 58231008a Sheet 7
3Harness Layout (Connector Locations)
18
STOP
LMP
C661
DOOR
AJAR
C645
130 RD 16
150 RD 14
150 RD 14
180 PK 16
280 LB/RD 18
700 DB/WT 12
170 RD 12
BATT
BLU
BRN
GRN
RED
WHT
BLU
BRN
GRN
RED
WHT
WHT
BRN
GRN
RED
IGN
HTR PWR
WHT
ACC
25A
HTR
15A
HORN/DM
20A
TAIL LPS
15
STP/HZD
10A
ACC-RADIO
GRY
C
B
GRY
A
U
X
20A
GAUGES
15A
1-3
15A
ENG-BAT
20A
ECM-1
30A
AUX.
25
WIPER
10A
TRANS
FUSE/PLR
130 RD 16
C112
2
C110
9
C112
4
C112
8
C113
2
C111
9
C113
4
C113
8
150 RD 14
TO CHASSIS
HEADLAMP
SWITCH
STEREO
AUXILIARY SWITCHES
280 LB/RD 18
700 DB/WT 12
170 RD 12
YL
C113
3
TURN
FLASHER
170 RD 14
110 PK/BK 14
C112
1
YL
BR
STEREO
280 LB/RD 18
110 PK/BK 14
C112
3
YL
AUXILIARY SWITCHES
180 PK 16
FUSE BLOCK
TO CHASSIS
WIPER
SWITCH
CIGARETTE LIGHTER
150 RD 16
30A
PWR
20A
ECM-BAT
5A
INST-LPS
C113
11
700 DB/WT 12
15A
TURN-BU
20A
ENG-1
C112
11
C113
1
110 PK/BK 16
C510
D
120 OR 16
C511
A
231 BR/WT 18
HVAC PANEL LAMPS
C100
D
NOT USED
HVAC SYSTEM
DRL-DOMESTIC
AUXILIARY SWITCHES
DRL-DOMESTIC
OR ISOLATOR EXCITER CIRCUIT
WIPER SYSTEM
19
Power Dist - Diagram 58231008a Sheet 8
4Power Distribution
POWER DISTRIBUTION (STANDARD)
5Grounding System
20
GROUNDING SYSTEM
500 BR 16
INTERMITTENT WIPER MODULE
530 BK 12
DRL-DOMESTICS
FORWARD LAMPS
WASHER PUMP
AUXILIARY HEATER
(SCS ONLY)
500 BK 18
COWL
500 BK 16
500 BK 16
500 BK 18
500 BK 14
HVAC SYSTEM
PANEL LAMPS
C410
14
500 BK 14
500 BK 14
500 BK 12
500 BK 18
C411
14
C412
14
ROOF CENTRAL
GROUND
AUXILIARY SWITCHES
500 BK 16
CIGARETTE LIGHTER
500 BK 18
C111
8
C110
8
510 BK/WT 16
WIPER SYSTEM
Grounding Sys - Diagram 58231008a Sheet 9
6Switches
SWITCHES
ON/OFF
8
AUXILiARY
SWITCH 1
(BATTERY
POWER)
7
2
3
ON/ON
8
AUXILiARY
SWITCH 2
(IGNITION
POWER)
7
1
2
3
6
C301
6
222 YL/BK 18
C410
1
C411
1
222 YL/BK 18
C412
1
C301
1
224 YL/WT 14
C410
3
C411
3
224 YL/WT 14
C412
3
C301
2
150 RD 14
C301
3
220 YL 14
C410
2
C411
2
220 YL 14
C412
2
C410
8
C411
8
256 DG/WT 14
C412
8
WIRE COLOR TO LOAD FUNCTION MAY VARY, BASED
ON OPTIONS CHOSEN AND NUMBER OF SWITCHED
OPTIONS CHOSEN.
C410
9
C411
9
254 DG 14
C412
9
SPECIAL REQUESTED OPTIONS MAY BE WIRED DIFFERENTLY
THAN SHOWN ON THIS OR OTHER SHEETS.
C301
7
500 BK 18
C301
8
280 LB/RD 18
C302
1
256 DG/WT 14
C302
2
110 PK/BK 14
C302
3
254 DG 14
C302
7
500 BK 18
C302
8
280 LB/RD 18
TYPICAL SWITCH USAGES:
ON/OFF LIGHTING, HTD MIRRORS, POWER VENTS
ON/ON 3-WAY CARGO LIGHT SWITCHING ONLY
ON/OFF/ON AUX. HEATERS, DASH FANS, (2 SPEED LOADS)
C100
K
ON/OFF/ON
8
AUXILIARY
SWITCH 3
(BATTERY
POWER)
C303
1
7
1
2
6
3
ON/OFF
8
AUXILIARY
SWITCH 4
(IGNITION
POWER)
2
3
7
C410
12
C411
12
258 LB/WT 14
C412
12
C411
11
257 LB 14
C412
11
C303
2
150 RD 14
C303
3
257 LB 14
C410
11
C303
7
500 BK 18
C100
H
C303
8
280 LB/RD 18
C304
1
253 DB/WT 14
C304
2
110 PK/BK 14
C304
3
255 DB 14
C304
7
500 BK 18
C304
8
280 LB/RD 18
SWITCHES SHOWN ARE FOR VISUAL FUNCTIONAL
REASONS ONLY. THEY ARE NOT NECESSARILY
MATCHED TO THE CONNECTOR NUMBER
SHOWN.
POWER
DISTRIBUTION
258 LB/WT 14
C100
U
C100
V
500 BK 18
PANEL LAMPS GROUND
280 LB/RD 18
150 RD 14
21
110 PK/BK 14
Switches - Diagram 58231008a Sheet 10
7Cargo Lamps
Standard
22
CARGO LAMPS STANDARD WIRING
ON/OFF
7
REAR
CARGO LAMP
SWITCH
8
2
POWER
DISTRIBUTION
C301
6
222 YL/BK 18
C410
1
C301
1
224 YL/WT 14
C410
3
C301
2
150 RD 14
C301
3
220 YL 14
220 YL/BK 16
CARGO
LIGHT
JUMPER WIRE
220 YL 16
3
220 YL 16
C410
2
C411
2
220 YL 14
C412
2
C413
2
220 YL/BK 16
150 RD 18
Cargo Lamps Std - Diagram 58231008a Sheet 30
7Cargo Lamps
Switch on Dash
CARGO LAMPS SWITCHED ON DASH
ON/OFF
7
CARGO LAMP
SWITCHED AT
DASH
8
2
3
GROUND
POWER DISTRIBUTION
POWER DISTRIBUTION
C301
6
222 YL/BK 18
C410
1
C301
1
224 YL/WT 14
C410
3
C301
2
150 RD 14
C301
3
220 YL 14
C301
8
280 LB/RD 18
C301
7
500 BK 18
C410
2
C411
2
220 YL 14
C412
2
C413
2
220 YL 16
CARGO
LIGHT
500 BK 18
280 LB/RD 18
150 RD 14
Cargo Lamps Switched at Dash - Diagram 58231008a Sheet 31
23
7Cargo Lamps
Three-Way Switch
24
CARGO LAMPS 3-WAY SWITCH
ON/ON
8
7
1
CARGO
LIGHT
2
3
6
REAR CARGO
LAMP SWITCH
ON/ON
8
7
1
2
3
6
CARGO LAMP
SWITCH ON
DASH
C301
6
222 YL/BK 18
C301
1
224 YL/WT 14
C301
2
150 RD 14
C301
3
220 YL 14
C301
8
280 LB/RD 18
C301
7
500 BK 18
GROUND
POWER DISTRIBUTION
POWER DISTRIBUTION
C411
1
222 YL/BK 18
C412
1
C413
1
222 YL 16
C410
3
C411
3
224 YL/WT 14
C412
3
C413
3
224 YL/BK 16
C410
2
C411
2
220 YL 14
C412
2
C413
2
220 YL/BK 16
C410
1
500 BK 18
280 LB/RD 18
150 RD 14
Cargo Lamps 3-Way Switch - Diagram 58231008a Sheet 32
94 PK
C510
D
120 OR 16
C110
4
C111
4
120 OR 16
C100
A
C101
A
120 OR 16
C510
B
890 VT 18
C110
2
C111
2
890 VT 18
C100
B
C101
B
890 VT 18
91 GY
C510
E
820 DG 16
C110
5
C111
5
820 DG 16
C100
F
C101
F
820 DG 16
92 VT
C510
C
830 RD 16
C110
3
C111
3
830 RD 16
C100
E
C101
E
830 RD 16
96 OR
C510
F
840 GY 16
C110
6
C111
6
840 GY 16
C100
G
C101
G
840 GY 16
WIPER
MOTOR
DG
L
RD
H
C207
C
BK
B
C207
D
YL
P
C208
A
BR
890 VT 18
143 YL
WIPER CONNECTOR
C110
8
510 BK/WT 16
WIPER POWER
C207
B
C207
A
25
GROUND
C111
8
510 BK/WT 16
GROUND
C100
J
C101
J
M
C206
A
M
510 BK/WT 16
500 BK 18
C206
B
WASHER
PUMP
Wiper Sys - Diagram 58231008a Sheet 11
G
8Wiper System
Standard and Cummins ISB4 Intermittent
STANDARD WIPERS
C510
D
120 OR 16
C110
4
C111
4
120 OR 16
C100
A
C101
A
120 OR 16
C510
B
890 VT 18
C110
2
C111
2
890 VT 18
C100
B
C101
B
890 VT 18
C110
5
C111
5
820 DG 16
830 RD 16
C110
3
C111
3
840 GY 16
C110
6
C111
6
C510
E
820 DG 16
C510
C
C510
F
C100
F
C101
F
820 DG 16
830 RD 16
C100
E
C101
E
830 RD 16
840 GY 16
C100
G
C101
G
840 GY 16
C207
B
C207
A
DG
L
RD
H
C207
C
BK
B
C207
D
YL
P
C111
8
510 BK/WT 16
C100
J
C101
J
BR
C208
A
C206
A
M
510 BK/WT 16
GROUND
500 BK 18
C206
B
WASHER
PUMP
WIPER POWER
510 BK/WT 16
C110
8
G
WIPER
MOTOR
890 VT 18
ROSTRA
CONTROL
LEVER
M
GROUND
THE CHASSIS-SUPPLIED TURN LEVER STALK IS REMOVED FROM THE
COLUMN AND REPLACED BY THE ROSTRA CONTROL LEVER.
Wiper Sys Itm - Diagram 58231008a Sheet 12
8Wiper System
ROSTRA
INTERMITTENT
WIPER
MODULE
(16100186)
INTERMITTENT WIPERS
GROUND
Intermittent Option (Non-Cummins ISB4)
26
500 BK 16
BLOWER
MOTOR
RELAY
ILLUMINATION
85
86
87
30
C331
1
DB/WT 12
POWER
DISTRIBUTION
280 LB/RD 18
C330
3
C330
4
C331
3
C331
4
LB 16
GROUND
530 BK 12
OR/WT 12
BK 16
LB 16
DB/WT 12
OR 16
C330
1
DB 16
700 DB/WT 12
BK 16
LB 16
POWER
DISTRIBUTION
BK 16
87a
BK 12
BK 12
DB/WT 14
OR 16
DB 16
B
L
BLOWER
SWITCH
M
H
BLOWER
MOTOR
RESISTOR
BK 12
BN 16
OR/WT 12
C
YL 16
M
BLOWER
MOTOR
27
Heat Only Sys - Diagram 58231008a Sheet 13
9Heater Only System
Cable Controls
HEATER ONLY SYSTEM
CONTROLLER
BK
RD/WT
M
RD/BK
LB
BK
DG
LG
HEAT ONLY ELECTRONIC CONTROLS
YL
OR
PK
RD
WT
YL/WT
YL/BK
DB/WT
DB/BK
DG/WT
DG/BK
BR/BK
BK
DB/WT
C333
1
C333
6
REC
VT
1
DB
20
GY
9Heater Only System
Electronic Controls
28
TEMPERATURE
CONTROL
PANEL LAMPS
M
VENT
LB
C334
C333
4
4
C334
C333
1
1
C334
C333
3
3
530 BK
700 DB/WT
C331
530 BK
C330
4
4
C331
C330
1
1
C331
C330
3
3
700 DB/WT
(GROUNDING)
(POWER
DISTRIBUTION)
731 DB
MODE SWITCH
1 OFF
2 PANEL
3 FLOOR/PANEL
4 FLOOR
5 FLOOR/DEFROST
6 DEFROST
7 A/C
8 A/C MAX
700 DB/WT
C334
1
C334
6
M
DEFROST
280 LB/RD
280 LB/RD
(POWER
DISTRIBUTION)
L
M
H
86
DB
87
YL
OR/RD
87a
731 DB
30
FAN SWITCH
1 LOW
2 MED LOW
3 MED HIGH
4 HIGH
700 DB/WT
85
C100
S
C100
T
B
C101
S
C101
T
M
FLOOR
500 BK
(SHEET 9)
DB/WT
SYSTEM POWER
RELAY
YL/RD
C332
8
C332
7
C332
5
DB
BR
85
OR
BLOWER
MOTOR
M
M
86
87
30
87a
2
1
4
3
WATER VALVE
BLOWER MOTOR RESISTOR
BLOWER HI
RELAY
BK
BK
Heat Elect Conrols - Diagram 58231212a Sheet 17
HVAC SYSTEM
DG 18
GY 18
C101
C
C209
A
TO COMPRESSOR
THERMO
SWITCH
ILLUMINATION
9HVAC System
Cable Controls
HI/LO PRESSURE
SWITCH
BLOWER
MOTOR
RELAY
A/C
SWITCH
C100
C
85
86
87
30
POWER
DIST
GROUND
280 LB/RD 16
530 BK 12
C331
1
C331
2
C331
3
C331
4
OR/WT 12
BK 16
BK 16
DG 16
DG 16
DG 16
DG 16
LB 16
BK 16
LB 16
C330
1
C330
2
C330
3
C330
4
DB/WT 12
DB/WT 12
DG 18
OR 16
700 DB/WT 12
DB 16
POWER
DIST
BK 16
710 DG 18
87a
LB 16
BK 12
BK 12
DG 16
DB/WT 14
OR 16
DB 16
B
L
BLOWER
SWITCH
M
H
BLOWER
MOTOR
RESISTOR
BK 12
BN 16
OR/WT 12
C
YL 16
M
BLOWER
MOTOR
29
HVAC Sys - Diagram 58231008a Sheet 14
PANEL
LAMPS
CONTROLLER
COMPRESSOR CLUTCH
1
M
BK
RD/BK
RD/WT
BK
LB
VT
DG
SWITCH A
OPENS @ 460 PSI
CLOSES @ 22 PSI
NORM CLOSED
YL
OR
PK
RD
WT
YL/WT
YL/BK
DB/WT
DB/BK
DG/WT
DG/BK
BR/BK
LG
GY
DB
20
BK
DB/WT
C333
1
C333
6
REC
TEMPERATURE
CONTROL
9HVAC System
Electronic Controls
30
HVAC ELECTRONIC CONTROLS
M
VENT
A/C CLUTCH
DB
85
85
30
M
H
FAN SWITCH
1 LOW
2 MED LOW
3 MED HIGH
4 HIGH
86
DB
87
YL
30
1
1
1
C331
C330
C331
C330
3
3
3
C331
C330
C331
5
5
5
(GROUND)
530 BK
700 DB/WT
(POWER
DISTRIBUTION)
(POWER
DISTRIBUTION)
3 280 LB/RD
C330
(POWER
DISTRIBUTION)
5 715 OR/WT
87
87a
OR/RD
87a
4
C330
1
86
700 DB/WT
L
4
C331
C101
S
C101
T
B
731 DB
M
C330
C331
4
C330
C100
S
C100
T
DB
FLOOR
C330
4
C331
500 BK 18
(GROUND)
DB/WT
SYSTEM POWER
RELAY
YL/RD
C332
8
C332
7
C332
5
LB
C331
731 DB
MODE SWITCH
1 OFF
2 PANEL
3 FLOOR/PANEL
4 FLOOR
5 FLOOR/DEFROST
6 DEFROST
7 A/C
8 A/C MAX
700 DB/WT
C334
1
C334
6
M
DEFROST
BR
DE-ICING SWITCH
OPEN 29°F
CLOSED 35°F
85
OR
BLOWER
MOTOR
M
86
87
30
87a
2
1
4
3
M
WATER VALVE
BLOWER MOTOR RESISTOR
BLOWER HI
RELAY
BK
BK
HVAC Elect Controls - Diagram 58231212a Sheet 18
BLK .08
250
C118
(GM FORMAT)
C118
BODY BUILDER
CONNECTOR
(SHEET 14)
(L31/L35)
B
A
A/C CMPR
REFRIG PRESS
SWITCH
C118
A
DK GRN 0.8
603 (L31/L35)
TO VCM J3-30 (L31/L35)
A/C CMPR HIGH PRESS
CUTOFF SW
C118
B
LT BLU 0.8
C115
C115
203
DK GRN/WHT 0.8
A
DK GRN/WHT 0.8
762
B
C115
TO VCM J3-25 (L31/L35)
J1-2 (E.D. L57/NB6)
762
B
GRA 0.8
922
1.1 K OHM (L31/L35)
.75 W
BODY BUILDER
CONNECTOR
(L57/NB6)
899
BLK 0.8
899
450
DK GRN/WHT 0.8
762 (L57)
A/C CMPR
RELAY
15A "ENG-BAT" FUSE
ORN 0.8
C119
540
30
A/C CMPR
CLU COIL
C119
DK GRN 0.8
DK GRN 0.8
59
87
59
C166
A
899
C119
85
C119
20A "GAUGE" FUSE
PINK 0.8
39 (L31/L35)
85
899
C119
86
C166
BLK 0.8
BLK .08
BLK .08
250 (L57)
250
250
C119
86
DK GRN/WHT 0.8
459
B
TO VCM J3-1(L31/L35)
J3-5(E.D. L57/NB6)
DENOTES MECHANICAL DIESEL ONLY
31
E.D. DENOTES ELECTRONIC DIESEL
Chasis Prep AC - Diagram 58231008a Sheet 15
10Chassis Supplied A/C Prep
CHASSIS SUPPIED A/C PREP PACKAGE
A/C CMPR
REFRIG PRESS
SWITCH
C204
B
C204
E
C204
A
C204
C
C204
D
C204
F
C205
B
C205
E
C205
A
C205
C
C205
D
C205
F
230 BR 18
230 BR 18
500 BK 16
500 BK 18
235 GY 18
235 GY 18
HEADLAMP
FEED CONNECTION
C713
A
C713
B
C713
C
LEFT
TURN SIGNAL
240 LG/BK 18
239 DB 16
239 DB 16
C711
B
C711
A
C711
C
LEFT
HEADLAMP
235 YL 18
242 RD/BK 16
240 LG/BK 18
233 DG 18
230 BR 18
242 RD/BK 16
239 DB 16
500 BK 16
C202
D
C202
C
C202
A
C202
E
C202
B
C203
D
C203
C
C203
A
C203
E
C203
B
242 RD/BK 16
240 LG/BK 16
C710
C
C710
A
C710
B
RIGHT
HEADLAMP
C712
C
C712
B
C712
A
RIGHT
TURN SIGNAL
C714
B
C714
A
RIGHT
SIDEMARKER
240 LG/BK 18
233 GY 18
233 GY 18
500 BK 16
500 BK 18
230 BR 18
230 BR 18
233 GY 18
230 BR 18
GROUNDING
LEFT
SIDEMARKER
240 LG/BK 18
242 RD/BK 16
242 RD/BK 16
C200
A
C200
C
C200
D
C200
E
C200
B
C200
F
C715
A
C715
B
500 BK 16
Forward Lamp Wiring (Canadian DRL) - Diagram 58231008a Sheet 17
11Front Light Wiring
235 GY 18
With Cummins ISB4 Diesel Engines
NOTE: This schematic is for all vehicles
with the Cummins ISB4 diesel engine.
For domestic vehicles without the ISB-4
engine, see the following pages. To
identify the engine of a vehicle, see page
6. (This is schematic is also the same
one used in all Canadian vehicles.)
32
230 BR 18
FORWARD LAMP WIRING (W/DRL CANADA)
C204
B
C204
E
C204
A
C204
C
C204
D
C205
B
C205
E
C205
A
C205
C
C205
D
230 BR 18
230 BR 18
500 BK 16
500 BK 18
235 GY 18
235 GY 18
242 RD/BK 16
240 LG/BK 18
242 RD/BK 16
HEADLAMP
FEED CONNECTION
235 YL 18
C200
242 RD/BK 16
C200
240 LG/BK 18
C200
233 DG 18
C200
230 BR 18
242 RD/BK 16
500 BK 16
C202
D
C202
C
C202
A
C202
E
C202
B
C203
D
C203
C
C203
A
C203
E
C203
B
242 RD/BK 16
240 LG/BK 16
LEFT
TURN SIGNAL
C711
B
C711
A
C711
C
LEFT
HEADLAMP
C710
C
C710
A
C710
B
RIGHT
HEADLAMP
C712
C
C712
B
C712
A
RIGHT
TURN SIGNAL
C714
B
C714
A
RIGHT
SIDEMARKER
240 LG/BK 18
233 GY 18
233 GY 18
500 BK 16
500 BK 18
230 BR 18
230 BR 18
233 GY 18
230 BR 18
GROUNDING
C713
A
C713
B
C713
C
240 LG/BK 18
500 BK 16
C200
LEFT
SIDEMARKER
500 BK 16
33
Forward Lamp Wiring W/O DRL - Diagram 58231008a Sheet 16
11Front Light Wiring
235 GY 18
C715
A
C715
B
Without Daytime Running Lights
NOTE: This schematic is for domestic
vehicles without the Cummins ISB4
diesel engine. For vehicles with the
ISB-4 engine, see page 32. To identify
the engine of a vehicle, see page 6.
230 BR 18
FORWARD LAMP WIRING (W/O DRL)
C101
S
C101
D
DG
RD
FORWARD LAMP WIRING (W/DRL-DOMESTIC)
DRL
MODULE
(16511938)
BK
GROUND
230 BR 18
WT
C204
B
C204
E
C204
A
C204
C
C204
D
C210
A
C210
B
OR
235 GY 18
C205
B
C205
E
C205
A
C205
C
C205
D
230 BR 18
230 BR 18
500 BK 16
500 BK 18
235 GY 18
235 GY 18
242 RD/BK 16
240 LG/BK 18
242 RD/BK 16
HEADLAMP
FEED CONNECTION
235 YL 18
C200
242 RD/BK 16
C200
240 LG/BK 18
C200
233 DG 18
C200
230 BR 18
242 RD/BK 16
500 BK 16
C202
D
C202
C
C202
A
C202
E
C202
B
C203
D
C203
C
C203
A
C203
E
C203
B
242 RD/BK 16
240 LG/BK 16
C713
A
C713
B
C713
C
LEFT
TURN SIGNAL
C711
B
C711
A
C711
C
LEFT
HEADLAMP
C710
C
C710
A
C710
B
RIGHT
HEADLAMP
C712
C
C712
B
C712
A
RIGHT
TURN SIGNAL
C714
B
C714
A
RIGHT
SIDEMARKER
240 LG/BK 18
233 GY 18
233 GY 18
500 BK 16
500 BK 18
230 BR 18
230 BR 18
233 GY 18
230 BR 18
GROUNDING
LEFT
SIDEMARKER
240 LG/BK 18
500 BK 16
C200
C715
A
C715
B
500 BK 16
Forward Light Wiring (DRL Domestic) - Diagram 58231008a Sheet 18
11Forward Light Wiring
BATT PWR
C100
S
C100
D
Daytime Running Lights (Domestic)
NOTE: This
schematic is for
domestic vehicles
without the
Cummins ISB4
diesel engine. For
vehicles with the
ISB-4 engine, see
page 32. To
identify the engine
of a vehicle, see
page 6.
34
IGN PWR
C204
B
C204
E
C204
A
C204
C
C204
D
C204
F
C205
B
C205
E
C205
A
C205
C
C205
D
C205
F
230 BR 18
230 BR 18
500 BK 16
500 BK 18
235 GY 18
235 GY 18
HEADLAMP
FEED CONNECTION
C713
A
C713
B
C713
C
LEFT
TURN SIGNAL
242 RD/BK 16
240 LG/BK 18
239 DB 16
239 DB 16
C711
B
C711
A
C711
C
LEFT
HEADLAMP
235 YL 18
242 RD/BK 16
240 LG/BK 18
233 DG 18
230 BR 18
242 RD/BK 16
239 DB 16
500 BK 16
C202
D
C202
C
C202
A
C202
E
C202
B
C203
D
C203
C
C203
A
C203
E
C203
B
242 RD/BK 16
240 LG/BK 16
C710
C
C710
A
C710
B
RIGHT
HEADLAMP
C712
C
C712
B
C712
A
RIGHT
TURN SIGNAL
C714
B
C714
A
RIGHT
SIDEMARKER
240 LG/BK 18
233 GY 18
233 GY 18
500 BK 16
500 BK 18
230 BR 18
230 BR 18
233 GY 18
230 BR 18
GROUNDING
LEFT
SIDEMARKER
240 LG/BK 18
242 RD/BK 16
C200
A
C200
C
C200
D
C200
E
C200
B
C200
F
C715
A
C715
B
500 BK 16
35
Forward Lamp Wiring (Canadian DRL) - Diagram 58231008a Sheet 17
11Forward Light Wiring
235 GY 18
Daytime Running Lights (Canadian)
NOTE: This schematic is for
all Canadian vehicles (with or
without the Cummins ISB4
diesel engine).
230 BR 18
FORWARD LAMP WIRING (W/DRL CANADA)
230 BR 18
C622
A
238 GY 18
238 GY 18
500 BK 18
500 BK 18
230 BR 18
230 BR 18
C637
C
C637
B
C637
A
LEFT
STOP/TURN/TAIL
LAMP
C638
B
C638
C
LEFT
BACK-UP
LAMP
LICENSE PLATE WIRING CONNECTORS 620 & 621
ARE UTILIZED WHEN REAR LIGHTING IS LOCATED
OUTSIDE THE KICKPLATE AREA(I.E. KIDNEYS
OR SIDEMETAL).
238 YL 18
500 BK 18
230 BR 18
BACK-UP
ALARM
(OPTION)
236 LG 18
REAR LAMP
FEED CONNECTION
238 YL 18
C634
E
C634
B
C634
C
C634
A
236 LG 18
500 BK 18
236 LG 18
500 BK 18
C610
B
C610
G
C610
A
230 BR 18
234 RD 18
C633
E
C633
B
C633
C
C633
A
C633
D
236 LG 16
230 BR 18
230 BR 16
C621
A
500 BK 18
C610
F
C610
C
LICENSE
PLATE
LAMP
LICENSE PLATE
LAMP(OPTION)
234 RD 16
232 DG 18
230 BR 18
236 LG 18
234 RD 18
236 LG 18
230 BR 18
500 BK 16
500 BK 18
232 DG 18
C631
D
C631
A
C631
C
C631
B
C631
E
500 BK 18
C632
A
C632
C
C632
B
C632
E
C620
A
LICENSE PLATE
LAMP(OPTION)
C636
C
C636
B
RIGHT
BACK-UP
LAMP
C635
A
C635
B
C635
C
RIGHT
STOP/TURN/TAIL
LAMP
236 LG 18
230 BR 18
230 BR 18
500 BK 18
500 BK 18
232 GY 18
232 GY 18
GROUND
TO FRAME
RAIL
230 BR 18
C623
A
LICENSE
PLATE
LAMP
Rear Lamp Wiring Std - Diagram 58231008a Sheet 19
12Rear Light Wiring
Standard
36
REAR LAMP WIRING - STANDARD
500 BK 18
230 BR 16
HIGH MOUNT
LICENSE PLATE
GROUND
TO BODY
238 YL 16
236 LG 16
230 BR 16
500 BK 16
234 RD 16
232 DG 16
C418
2
C419
2
238 YL 18
238 YL 18
C418
5
C419
5
236 LG 16
236 LG 16
C418
3
C418
6
C419
3
C419
6
230 BR 16
230 BR 16
C412
13
C413
13
234 RD 16
234 RD 16
C418
1
C419
1
232 DG 18
232 DG 18
500 BK 18
230 BR 18
230 BR 18
500 BK 18
236 LG 18
C637
C
C637
B
C637
A
LEFT
STOP/TURN/TAIL
LAMP
C638
B
C638
C
LEFT
BACK-UP
LAMP
C636
C
C636
B
RIGHT
BACK-UP
LAMP
C635
A
C635
B
C635
C
RIGHT
STOP/TURN/TAIL
LAMP
500 BK 16
500 BK
234 RD 16
CHMSL LAMP
(OPTIONAL)
236 LG 18
500 BK 18
236 LG 18
236 LG 16
230 BR 16
O
C101
238 YL 18
500 BK 18
236 LG 18
SEE SHMSL
C100
238 YL 18
12Rear Light Wiring
Routed through Interior
REAR LAMP WIRING (ROUTED THROUGH INTERIOR)
TRANSMISSION
SWITCH
O
CHASSIS COWL
CONNECTOR
230 BR 16
4
232 DG 16
5
6
3
2
230 BR 18
230 BR 18
500 BK 18
500 BK 18
232 DG 18
232 DG 18
C621
C620
LICENSE PLATE LOCATED
IN KICK PLATE
1
P
H
N
G
M
F
L
E
D
C
K
B
J
A
238 YL 16
9 BR
CHASSIS IP
HARNESS
19 DG
18 YL
37
GROUND
Rear Lamps Thru Interior - Diagram 58231008a Sheet 20
238 GY 18
500 BK 18
230 BR 18
BACK-UP
ALARM
(OPTION)
236 LG 18
234 RD 18
C633
E
C633
B
C633
C
C633
A
C633
D
C634
E
C634
B
C634
C
C634
A
C634
D
238 GY 18
234 RD 18
500 BK 18
500 BK 18
230 BR 18
230 BR 18
C637
C
C637
B
C637
A
LEFT
STOP/TAIL
LAMP
C642
B
C642
A
LEFT
TURN
LAMP
C638
B
C638
C
LEFT
BACK-UP
LAMP
236 LG 18
234 RD 18
500 BK 18
238 GY 18
500 BK 18
CHASSIS
REAR LAMP
FEED CONNECTION
C610
B
C610
G
C610
A
238 YL 18
236 LG 18
236 LG 16
230 BR 18
230 BR 16
C621
A
500 BK 18
C610
F
C610
C
LICENSE
PLATE
LAMP
* LICENSE PLATE
LAMP(OPTIONAL)
234 RD 16
232 DG 18
230 BR 18
236 LG 18
500 BK 18
234 RD 18
236 LG 18
230 BR 18
500 BK 16
500 BK 18
232 DG 18
C631
D
C631
A
C631
C
C631
B
C631
E
C632
D
C632
A
C632
C
C632
B
C632
E
234 RD 18
236 LG 18
232 GY 18
500 BK 18
230 BR 18
230 BR 18
500 BK 18
500 BK 18
232 GY 18
234 RD 18
GROUND
TO FRAME
RAIL
IN ORDER TO SPLIT THE STOP LAMP
CIRCUIT OFF OF THE TURN SIGNAL LAMPS, THE STOP
LAMP FEED (WHITE WIRE #17) AT THE STEERING
COLUMN HAS BEEN CUT AND TAPED BACK ON THE
CHASSIS HARNESS. THIS SYSTEM ALSO SEPARATES
4-WAY FLASHERS FROM THE STOP LAMPS.
LICENSE PLATE WIRING CONNECTORS 620 & 621
ARE UTILIZED WHEN REAR LIGHTING IS LOCATED
OUTSIDE THE KICKPLATE AREA (I.E., KIDNEYS
OR SIDEMETAL).
230 BR 18
C620
A
* LICENSE PLATE
LAMP(OPTIONAL)
C636
C
C636
B
RIGHT
BACK-UP
LAMP
C641
A
C641
B
RIGHT
TURN
LAMP
C635
A
C635
B
C635
C
RIGHT
STOP/TAIL
LAMP
C623
A
LICENSE
PLATE
LAMP
Rear Lamp Wiring (Split Lights) - Diagram 58231008a Sheet 21
12Rear Light Wiring
C622
A
Split Taillights
38
230 BR 18
REAR LAMP WIRING (SPLIT TAILLIGHTS)
HIGH MOUNT
LICENSE PLATE
GROUND
TO FRAME
RAIL
238 YL 18
234 RD 18
500 BK 18
500 BK 18
230 BR 18
230 BR 18
236 LG 18
238 YL 16
236 LG 16
230 BR 16
500 BK 16
234 RD 16
232 DG 16
234 RD 18
C419
2
238 YL 18
238 YL 18
C418
5
C419
5
236 LG 16
236 LG 16
500 BK 18
C418
3
C418
6
C419
3
C419
6
230 BR 16
230 BR 16
236 LG 18
C412
13
C413
13
234 RD 16
234 RD 16
C418
1
C419
1
232 DG 18
232 DG 18
236 LG 18
234 RD 16
500 BK 18
234 RD 18
0B
23
236 LG 18
R
16
O
C101
LEFT
STOP/TAIL
LAMP
C642
B
C642
A
LEFT
TURN
LAMP
C638
B
C638
C
LEFT
BACK-UP
LAMP
C636
C
C636
B
RIGHT
BACK-UP
LAMP
C641
A
C641
B
RIGHT
TURN
LAMP
C635
A
C635
B
C635
C
RIGHT
STOP/TAIL
LAMP
500 BK 16
500 BK
SHMSL LAMP
(OPTION)
SHMSL
C100
500 BK 18
238 YL 18
C418
2
C637
C
C637
B
C637
A
236 LG 16
TRANSMISSION
SWITCH
O
C620
4
P
6
3
2
1
H
G
F
L
232 DG 16
5
N
M
E
500 BK 18
230 BR 18
230 BR 18
500 BK 18
500 BK 18
232 DG 18
234 RD 18
C621
LICENSE PLATE LOCATED
IN KICK PLATE
230 BR 16
232 DG 18
IN ORDER TO SPLIT THE STOP LAMP
CIRCUIT OFF OF THE TURN SIGNAL LAMPS, THE STOP
LAMP FEED (WHITE WIRE #17) AT THE STEERING
COLUMN HAS BEEN CUT AND TAPED BACK ON THE
CHASSIS HARNESS. THIS SYSTEM ALSO SEPARATES
4-WAY FLASHERS FROM THE STOP LAMPS.
CHASSIS COWL
CONNECTOR
D
C
K
B
J
A
238 YL 16
9 BR
19 DG
18 YL
39
GROUND
CHASSIS
IP HARNESS
Rear Lamp Wiring Interior Split Lights - Diagram 58231008a Sheet 22
12Rear Light Wiring
230 BR 16
500 BK 18
Split Taillights Routed through Interior
REAR LAMP WIRING ROUTED THROUGH INTERIOR -SPLIT TAILLIGHTS
13Roof Wiring
40
TYPICAL ROOF WIRING
ON/OFF
REAR
CARGO
SWITCH
(STANDARD UNIT)
7
8
2
3
DOOR
AJAR
SWITCH
(OPTION)
DASH
FAN
(OPTION)
CARGO
LIGHT
REAR CLEARANCE/I.D. LAMPS
M
SHMSL
LAMP
(OPTION)
"A" PILLAR
HARNESS
231 BR/WT 16
234 RD 18
220 YL/BK 16
257 RD 16
350 BK/PK 18
C413
2
C413
7
C413
13
C413
6
255 OR 16
220 YL/BK 16
231 BR/WT 16
220 YL 16
C415
A
C413
8
C413
9
C413
4
C413
5
520 BK 16
CARGO
LIGHT
200 DB 16
REAR CLEARANCE/I.D. LAMPS
CAB
LIGHT
200 DB 16
520 BK 16
350 BK 16
234 RD 16
231 BR/WT 16
Roof Wiring - Diagram 58231008a Sheet 23
14Clearance Lights
ROOF WIRING
C412
6
ROOF WIRING
C414
A
231 BR/WT 14
C411
6
C410
6
231 BR/WT 14
CLEARANCE LIGHTS
87
500 BK 18
86
87a
85
231 BR/WT 18
C113
5
C112
5
231 BR/WT 18
CLEARANCE
LIGHT
SIGNAL
30
170 RD 14
POWER
DISTRIBUTION
GROUND
41
Clearance Lights - Diagram 58231008a Sheet 24
15Panel Lights (HVAC Control Panel)
42
PANEL LAMPS
280 LB/RD 18
C303
C303
8
7
(AUX. SW #3)
280 LB/RD 18
C302
C302
8
7
500 BK 18
(AUX. SW #2)
PANEL LAMPS
280 LB/RD 18
C112
4
C113
4
280 LB/RD 18
C301
C301
8
7
(AUX. SW #1)
GROUND
C330
3
C331
4
C331
3
HVAC PANEL
ILLUMINATION
C330
4
530 BK 18
GROUND
Panel Lamps - Diagram 58231008a Sheet 25
16Stereo System
STEREO SYSTEM WIRING
150 RD 14
C112
2
C110
9
180 PK 16
C113
2
C111
9
150 RD 16
180 PK 16
C410
10
C410
15
C411
10
C411
15
150 RD 16
180 PK/BK 18
C412
10
C412
15
C413
10
C413
15
YL
RD
BK
BATT
WHT
BLU
WHT
BLU
WHT
WHT
ACC
BRN
GRN
GRN
RED
BRN
GRN
RED
IGN
HTR PWR
BRN
25A
HTR
15A
HORN/DM
20A
TAIL LPS
15
STP/HZD
10A
ACC-RADIO
GRY
C
B
GRY
A
U
X
RED
20A
ECM-BAT
20A
GAUGES
15A
1-3
15A
ENG-BAT
20A
ECM-1
30A
AUX.
25
WIPER
20A
ENG-1
5A
INST-LPS
10A
TRANS
FUSE/PLR
TURN
FLASHER
BK
WT
GY
STEREO STD
LEFT
SPKR
C413
10
C413
15
30A
PWR
15A
TURN-BU
BK
RIGHT
SPKR
RD
PK/BK
BK
BK/WT
BK/WT
DG
DB
LEFT
SPKR
STEREO OPT
RIGHT
SPKR
CHASSIS FUSE BLOCK
43
Stereo Sys - Diagram 58231008a Sheet 26
17Door Ajar System
44
DOOR AJAR
DOOR
AJAR
LIGHT
MAGNETIC
SWITCH
C413
7
C412
7
350 BK/PK 18
C411
7
C410
7
350 BK/PK 18
C113
9
C112
9
350 BK/PK 18
C661
A
CHASSIS OEM
SUPPLIED 12V
POWER
500 BK 18
350 BK 16
Door Ajar - Diagram 58231008a Sheet 27
18Supplemental High Mount Stop Lamp (SHMSL)
SUPPLEMENTAL HIGH MOUNT STOP
REAR LAMPS
OEM
STOP
LAMP
SWITCH
234 RD 16
SHMSL
LAMP
(OPTION)
C413
13
C412
13
234 RD 16
C411
13
C410
13
234 RD 16
C113
7
C112
7
234 RD 16
C645
A
LB 0.8
CLEARANCE LIGHTS
OR 0.8
OEM
STP/HZD
FUSE
45
Supplemental High Mount Stop Lamp - Diagram 58231008a Sheet 28
150 RD 14
C112
2
C112
11
130 RD 16
C113
11
130 RD 16
ACCESSORY
OUTLET
500 BK 16
150 RD 14
GROUND
BATT
WHT
BLU
WHT
BLU
WHT
WHT
ACC
BRN
GRN
GRN
RED
BRN
GRN
RED
IGN
HTR PWR
BRN
25A
HTR
15A
HORN/DM
20A
TAIL LPS
15
STP/HZD
10A
ACC-RADIO
GRY
C
B
GRY
A
U
X
RED
30A
PWR
15A
TURN-BU
20A
ECM-BAT
20A
GAUGES
15A
1-3
15A
ENG-BAT
20A
ECM-1
30A
AUX.
25
WIPER
20A
ENG-1
5A
INST-LPS
10A
TRANS
FUSE/PLR
CHASSIS FUSE BLOCK
TURN
FLASHER
Accessory Outlet
- Diagram 58231008a Sheet 29
19Accessory Outlet (Cigarette Lighter)
46
ACCESSORY OUTLET
20Cab Dome Light
CAB DOME LAMP
GM ORANGE WIRE
CHASSIS
HEADLAMP
SWITCH
GM WHITE WIRE
BATT
WHT
BLU
WHT
BLU
WHT
WHT
ACC
BRN
GRN
RED
BRN
GRN
RED
BRN
GRN
RED
IGN
HTR PWR
25A
HTR
15A
HORN/DM
20A
TAIL LPS
15
STP/HZD
10A
ACC-RADIO
GRY
C
B
GRY
A
U
X
20A
ECM-BAT
20A
GAUGES
15A
1-3
15A
ENG-BAT
20A
ECM-1
30A
AUX.
25
WIPER
5A
INST-LPS
10A
TRANS
FUSE/PLR
47
CHASSIS FUSE BLOCK
200 DB 16
C110
1
C111
1
200 DB 16
C410
4
C411
4
200 DB 16
C412
4
C413
4
200 DB 16
C510
A
520 BK 16
C110
7
C111
7
520 BK 16
C410
5
C411
5
520 BK 16
C412
5
C413
5
520 BK 16
30A
PWR
15A
TURN-BU
20A
ENG-1
CAB
LIGHT
C510
G
TURN
FLASHER
Cab Dome Light - Diagram 58231008a Sheet 33
21Dash Fan
48
DASH FAN
5
3
6
7
8
9
10
11
12
13
14
15
M
DARK GREEN/WHITE
DARK GREEN
RED
FAN
OR
2
4
RD
1
ORNGE
DASH
FAN
C412
16511952a01
ON/OFF/ON
8
7
1
2
3
6
DASH FAN
SWITCH ON
DASH
(AUX. SW #2)
C302
1
256 DG/WT 14
C302
2
110 PK/BK 14
C302
3
254 DG 14
C302
8
280 LB/RD 18
C302
7
500 BK 18
GROUND
POWER DISTRIBUTION
POWER DISTRIBUTION
C410
8
C411
8
256 DG/WT 14
C412
8
C413
8
256 DG/WT 16
C410
9
C411
9
254 DG 14
C412
9
C413
9
254 DG 16
500 BK 18
280 LB/RD 18
110 PK/BK 14
WIRE COLORS USED ON THIS OPTION MAY DIFFER
BASED ON NUMBER OF OPTIONS ON THE UNIT
Dash Fan - Diagram 58231008a Sheet 34
22Power Vent
POWER VENT
ON/OFF
8
7
2
3
6
POWER VENT
SWITCH ON
DASH
(AUX. SW #3)
C303
1
258 LB/WT 14
C303
2
150 RD 14
C303
3
257 LB 14
C303
8
280 LB/RD 18
C303
7
500 BK 18
C410
12
C411
12
258 LB/WT 14
C412
12
C410
11
C411
11
257 LB 14
C412
11
POWER
VENT
SECONDARY SWITCH
M
GROUND
500 BK 18
POWER DISTRIBUTION
280 LB/RD 18
POWER DISTRIBUTION
150 RD 14
ON/OFF
8
7
2
3
6
POWER VENT
SWITCH ON
DASH
(AUX. SW #2)
C302
1
256 DG/WT 14
C302
2
110 PK/BK 14
C302
3
254 DG 14
C302
8
280 LB/RD 18
C302
7
500 BK 18
PRIMARY SWITCH
GROUND
500 BK 18
49
POWER DISTRIBUTION
280 LB/RD 18
POWER DISTRIBUTION
110 PK/BK 14
C410
8
C411
8
256 DG/WT 14
C412
8
C410
9
C411
9
254 DG 14
C412
9
C413
9/11
254 DG 16
AUXILIARY SWITCH #2 (C302) IS THE PRIMARY SWITCH FOR THIS OPTION,
BUT IF THIS SWITCH IS ALREADY IN USE, THEN AUXILIARY SWITCH #3 (C303)
IS THE SECONDARY SWITCH.
Power Vent - Diagram 58231008a Sheet 35
23Heated Mirrors
50
HEATED MIRRORS
ON/OFF
8
7
2
3
6
HEATED MIRROR
SWITCH ON
DASH
(AUX. SW #3)
C303
1
258 LB/WT 14
C303
2
150 RD 14
C303
3
257 LB 14
C303
8
280 LB/RD 18
C303
7
500 BK 18
C410
12
C410
11
LEFT
HEATED
MIRROR
500 BK 16
254 DG 16
500 BK 16
254 DG 16
RIGHT
HEATED
MIRROR
SECONDARY SWITCH
GROUND
500 BK 18
POWER DISTRIBUTION
280 LB/RD 18
POWER DISTRIBUTION
150 RD 14
ON/OFF
8
7
2
3
6
HEATED MIRROR
SWITCH ON
DASH
(AUX. SW #2)
C302
1
256 DG/WT 14
C302
2
110 PK/BK 14
C302
3
254 DG 14
C302
8
280 LB/RD 18
C302
7
500 BK 18
C410
8
C410
9
C411
9/12
254 DG 16
GROUND
500 BK 16
PRIMARY SWITCH
GROUND
500 BK 18
POWER DISTRIBUTION
280 LB/RD 18
POWER DISTRIBUTION
110 PK/BK 14
Heated Mirrors - Diagram 58231008a Sheet 36
24Auxiliary Heater
AUXILIARY HEATER
ON/OFF/ON
8
7
1
2
3
6
AUX HEATER
SWITCH ON
DASH
(AUX. SW #2)
C304
1
253 DB/WT 14
C304
2
110 PK/BK 14
C304
3
255 DB 14
C304
8
280 LB/RD 18
C304
7
500 BK 18
C100
U
C101
U
256 RD 14
C340
B
C340
D
C100
V
C101
V
254 YL 14
GROUND
AUXILIARY
HEATER
C340
A
500 BK 14
LOCATED IN
CAB AREA AT
DRIVERS FEET
PRIMARY SWITCH
GROUND
POWER DISTRIBUTION
POWER DISTRIBUTION
500 BK 18
280 LB/RD 18
110 PK/BK 14
Aux Heater - Diagram 58231008a Sheet 37
51
25Spotlight or Strobe Light
52
SPOTLIGHT/STROBE LIGHTS
ON/OFF
8
7
2
3
6
SPOTLIGHT
SWITCH ON
DASH
(AUX. SW #3)
C303
1
258 LB/WT 14
C303
2
150 RD 14
C303
3
257 LB 14
C303
8
280 LB/RD 18
C303
7
500 BK 18
C410
12
C411
12
258 LB/WT 14
C412
12
C410
11
C411
11
257 LB 14
C412
11
SECONDARY SWITCH
GROUND
POWER DISTRIBUTION
POWER DISTRIBUTION
LIGHT
500 BK 18
280 LB/RD 18
150 RD 14
ON/OFF
8
7
2
3
6
SPOTLIGHT
SWITCH ON
DASH
(AUX. SW #2)
C302
1
256 DG/WT 14
C302
2
110 PK/BK 14
C302
3
254 DG 14
C302
8
280 LB/RD 18
C302
7
500 BK 18
PRIMARY SWITCH
GROUND
POWER DISTRIBUTION
POWER DISTRIBUTION
500 BK 18
280 LB/RD 18
C410
8
C411
8
256 DG/WT 14
C412
8
C410
9
C411
9
254 DG 14
C412
9
C413
9/11
254 DG 16
110 PK/BK 14
Spot/Strobe Light - Diagram 58231008a Sheet 38
Index
F
Fan, dash 40, 48
Federal Certification Label 7
Finding information 7
G
A
A/C. See HVAC
Accessory outlet 46
Address
National Highway Traffic Safety Administration 9
U.S. Department of Transportation 9
Utilimaster
Customer Service 10
Technical Publications 3
Air conditioning. See HVAC
Alarm, back-up 36, 38
Auxiliary heater. See Heater
B
Back-up. See Alarm and Light
Battery 9
Body serial number 7
Bumpers 10
C
Chevrolet chassis 6, 10
CHMSL (Center High Mount Stop Light). See
Light: Supplemental High Mount Stop
Light
Cigarette lighter. See Accessory outlet
Color code 11
Connectors 12, 13, 14, 15, 16, 17, 18
Cummins diesel 6, 14, 15, 16, 17, 25, 32
Cummins diesel ISB4 12
Customer service 10
D
Door ajar system 44
DRL 34, 35
E
Electrical components 10
Email 10
Glossary of terms 10
GM and GMC chassis 6, 10
Grounding system 20
H
Harness layout 18
Heated mirrors 50
Heater 10. See also HVAC
Auxiliary 51
System (no A/C) 27, 28
HVAC 29, 30, 31. See also Heater
L
Light
Back-up 36, 37, 38, 39
Cab 40
Cargo 23, 24, 40, 47
Center High Mount Stop Light
(CHMSL). See Light: Supplemental High Mount Stop Light
Clearance 40, 41
Daytime running (DRL) 34, 35
Forward 35
Front 32, 33, 34
Head light 32, 33, 34, 35
License plate 36, 37, 38, 39
Master three-way switch
22, 23, 24, 47
Panel 42
Rear 36, 37, 38, 39
Roof 40
Side marker 32, 33, 34, 35
Spot 52
Stop 36, 37, 38, 39
Strobe 52
Supplemental High Mount Stop Light
40
Tail 36, 37, 38, 39
Turn signal
32, 33, 34, 35, 36, 37, 38
53
M
U
Mirrors, heated 50
Unit serial number 7
Utilimaster Body Parts Manual 10
Utilimaster body serial number 7
Utilimaster Body Service Manual 10
Utilimaster Glossary of Terms 10
Utilimaster Quick Reference Parts
Guide 10
N
Numbers
Body serial number 7
Index 7
Phone 9, 10
Section 7
VIN 7
V
Outlet. See Accessory outlet
VACS 6
Vent, powered 49
VIN 7
P
W
Parts
Guide 10
Manual 10
Phone numbers 9, 10
Power distribution 19
Web site 3, 10
Wiper system 10
Intermittent 26
Standard 25
Workhorse chassis 6, 10
O
R
Revision 3
S
Safety 8, 9
Sections 7
Service manual 10
Spotlight 52
Stereo system 43
Strobe light 52
Switches
A/C 29, 30, 31
Auxiliary 21
Auxiliary heater 51
Blower 27, 28, 29, 30, 31
Dash 48
Heated mirror 50
Hi/Lo (A/C) 29, 30, 31
Master light switch 21
Master three-way (cargo) 23, 24, 47
Power vent 49
Spotlight 52
Strobe 52
Thermo (A/C) 29, 30, 31
54
Utilimaster Body Wiring Manual
Aeromaster on Workhorse Chassis
Part Number: 03102354-WY00EN
©
Utilimaster Corporation, 65906 State Road 19, P.O. Box 585, Wakarusa, Indiana, 465730585, USA

Workhorse Chassis--Body Electrical Wiring Manual

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