Volkswagen Cabriolet DIY Guide

Transcription

Volkswagen Cabriolet DIY Guide
Relay/Fuse Diagrams & Electrical System
Notes:
 1980-1982 cars use ceramic fuses!
 1980-1982 cars had a recall for the fuel pump relay. These cars should have a relay bypass adapter installed in the
original fuel pump relay location (position L), which is then connected to the fuel pump relay that has been relocated to
the top of the panel.
 If your car has factory-installed heated seats, the relays for this option are under each front seat (#443919533A).
 If your car has a factory-installed 2-stage after-run cooling fan system ('88+), the relay for this fan is mounted to the left
front fender (#141951253B).
 If your car has a factory-installed power windows, there is a control unit beneath the dash on the passenger side
(#191959875).
 If your car has a factory-installed power top, there is a covered thermo-fuse above the relay panel.
 Relays for options/equipment not shown in the diagrams (part numbers follow):
o Intake manifold heating ~ carburetor (#171906383)
o Intake manifold heating ~ EX, EW, DX engines (#191906383C)
o Daytime running lights (#701919505)
o Headlight washers (#701955200)
o Fog lamps (#141951253B)
o Power convertible top (#141951253B)
o Power windows ~ Europe (#141951253B)
o Temperature sensor (#191906086)
 ALL 1983-1993 Cabriolets have CE1 electrics.
Index:
1980 to 1982 Diagram (CIS)........................................................................................................................................... Page 2
1983 to 1984 Diagram (CIS)........................................................................................................................................... Page 3
1985 to July 1987 Diagram (CIS) .................................................................................................................................... Page 4
July 1987 to 1989 Diagram (to 1993 outside North America ~ CIS)................................................................................... Page 5
1990 to 1993 Diagram (Digifant)..................................................................................................................................... Page 6
Relay Panel Pin-outs (1980-1982) ................................................................................................................................... Page 7
Relay Panel Pin-outs (1983+) ........................................................................................................................................Page 10
How To Read Current Flow Diagrams .............................................................................................................................Page 15
Ground Locations ..........................................................................................................................................................Page 17
Wire Size Conversion Table............................................................................................................................................Page 18
© 2013 KamzKreationz/Cabby-Info.com
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Cabriolet Relay Diagrams & Electrical System
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Relay Panel Pin-Outs
(1980-1982)
A
Left Harness
Pin
A2
A3
A4
A5
A6
A7
Circuit
Spare wire
Alternator Exciter/Charging Circuit
Turn Signals
Horns
A8
Fuel System
A9
A10
A11
A14
A15
A16
A17
A18
A19
A20
Side-marker Lights
Horns
Brake Lights
Back-up Lights
Brake Lights
Back-up Lights
Headlights
Headlights
Emergency Flashers/Turn Signals
C
Pin
C1
C5
C6
C7
C8
C9
C11
C12
C13
C15
C16
C17
C18
C19
Goes To
Wire Color
Blue/Brown
Blue/Green
Blue
Blue/Green
Black/White
Brown
D4 internally
A5
D+ on alternator
A3
Left front indicator light
Control pressure regulator; Auxiliary air regulator; fuel pump; fuel pump
relay pin L14
Left running light
C10 and E17 internally
Horns
Brake light switch
Reverse light switch
Brake light switch
Reverse light switch
Left headlight pin 56a
Left headlight pin 56b
Emergency Flasher Switch Terminal L to Turn Signal Switch; C19; E6; D11
Black/Green
Gray/Black
Black/Yellow
Red/Yellow
Black
Red/Black
Black/Green
White/Black
Yellow/Black
Black/White
Right Harness
Circuit
Cooling System
Wipers/Washers
Wipers/Washers
Side-marker Lights
Headlights
Wipers/Washers
Headlights
Oil Pressure Warning
Wipers/Washers
Ignition System
Wipers/Washers
Wipers/Washers
Turn Signals
Ignition System
Goes To
Coolant temperature switch
Wiper motor pin 31
Wiper motor pin 53
Right running light
Right headlight pin 56b
Wiper motor pin 53e
Right headlight pin 56a
Oil pressure switch
Wiper motor pin 53a
Series resistance for coil
Wiper motor pin 53b
Washer motor/pump
Right front indicator light
Ignition coil pin 1
Page 7 of 18
Wire Color
Blue/Yellow
Brown
Green/Black
Gray/Red
Yellow
Green
White
Blue/Black
Black/Gray
White/Lilac
Green/Yellow
Green/Red
Black/Green
Black
D
Pin
D1
D2
D3
D4
D5
D7
D8
D9
D10
D11
D12
D14
D15
D16
D17
D18
D19
D20
D21
D22
Dashboard Harness
Circuit
Instrument Cluster
Instrument Cluster
Headlights
Parking brake, seat belt warning lights
Horns
Headlights / Load Reduction
Instrument Cluster
Headlights
Headlights
Ground
Emergency Flashers
Instrument Cluster/Dash
Instrument Cluster
Rear Window Defroster
Headlights
Instrument Cluster
HVAC
Emergency Flashers
Emergency Flashers
Instrument Cluster
E
Pin
E1
E2
E3
E5
E7
E8
E9
E10
E11
E12
E13
E15
E16
E18
E19
E20
E21
E22
Headlights
Ignition System
Emergency flashers
Headlights
Wipers/Washers
Headlights
Emergency flashers
Horns
Instrument Cluster
Wipers/Washers
Wipers/Washers
Wipers/Washers
Emergency flashers
Wipers/Washers
Wipers/Washers
Emergency Flashers
Goes To
Headlight switch pin 58L
Ignition switch pin 15
Emergency flasher switch pin 49a
Headlight switch pin 58R
E20
Wiper switch pin J
Headlight switch pin 58
Emergency flasher switch pin 56b
Horn relay pin 87
Harness plug at terminal 8 (fuel gauge)
Rear window defroster switch pin +
Wiper switch pin 53a
Wiper switch pin 53e
Wiper switch pin 53
Emergency flasher switch pin L
E7; wiper switch pin T
Wiper switch pin 53b
Emergency flasher switch pin R
Wire Color
Gray/Black
Black
Black/White/Green
Gray/Red
Green/Red
Brown/Black
Gray/Green
Yellow
Brown
Lilac/Black
Black/Yellow
unknown
Green/Black
Green
Black/White
Green/Red
Green/Yellow
Black/Green
Rear Harness
Circuit
Running Lights
Fuel System
Running Lights
Interior Lights
Running Lights
Turn Signals
Back-up Lights
Turn Signals
Brake Lights
G
Pin
G1
G2
G3
G4
Wire Color
Blue/Red
Blue
Red
Blue/Brown
Black
Black/White
Blue/Yellow
Red/Yellow
White
Brown
White
Red/Gray
Red
White/Green
White/Black
Blue/Black
Black/Red
Black/Blue
Red/White
Blue/white
Dashboard Harness
Circuit
F
Pin
F9
F10
F12
F13
F14
F15
F16
F18
F19
F20
Goes To
Harness plug at terminal 2 (turn indicator light)
Harness plug at terminal 10 (charging warning light)
Three-terminal connector for warning lights and e-brake light switch
Horns relay pin 86
Headlight switch pin X
Harness plug at terminal 1 (coolant temperature gauge)
Headlight dimmer switch pin 30
Headlight dimmer switch pin 56a
Emergency flasher switch pin 49
Clock; cigarette lighter
Harness plug at terminal 4 (tachometer)
Rear window defroster switch pin 86
Harness plug at terminal 11 (oil pressure warning light)
Blower motor switch pin +
Harness plug at terminal 3 (hi-beam indicator light)
Goes To
Left rear running light
Rear window defroster
Fuel gauge sender
License plate lights
Interior courtesy light
Right rear running light
Right rear indicator light
Reverse lights
Left rear indicator light
Brake lights
Wire Color
Gray/Black
White
Lilac/Black
Gray/Green
Red/Green
Gray/Red
Black/Green
Black
Black/White
Black/Red
Individual Circuits
Circuit
Radiator Cooling Fan
Wipers/Washers
Seat Belt Warning
Lighting
Goes To
H; internally to G6 via fuse 15
Internally to E7; relay M at pin 20
Seat belt relay terminal 15; seat belt warning light
Internally to fuse 12 and pin F13
Page 8 of 18
Wire Color
Red
Black
G5 Alternator Excitor Circuit
G6 Radiator Cooling Fan
G7 Ignition System / Load Reduction
G8 Headlights
G9 Oil Pressure Warning System
G10 -
H
Pin
H
H
H
H
Internally
Internally
Internally
10
Internally
Internally
Internally
to A4, D2, C2
to G1 via fuse 15; radiator fan thermo switch
to E13; load reduction relay; D5 & E15 via fuse 11; D19 via fuse
to C11 via fuse 4, A18 via fuse 3, D10, D22
to C12, D18
to D17
Red/Black
-
Individual Circuits – Battery Power
Circuit
-
Goes To/Comes From
Battery
Fuel injection power supply relay
Ignition switch
Radiator fan
Page 9 of 18
Wire Color
Red
Red
Red
Red
Relay Panel Pin-Outs
(1983+)
www.cabby-info.com
A
Dashboard Wiring Harness
Pin
A01 Dash Lights
Description
A02 Wiper Switch
A03
A04
A05
A06
A07
A08
A09
Instrument Cluster
Instrument Cluster
Wiper Switch ~ High Speed Signal
Wiper Motor Switch
Ignition System
-
A10 Emergency Flashers
A11
A12
A13
A14
A15
A16
A17
A18
Wiper Switch ~ Intermittent Signal
Emergency Flasher Switch
E-brake Warning Light
Instrument Cluster
Instrument Cluster
Emergency Flashers
A19 Wiper Switch ~ Washer
A20 Emergency Flashers/Turn Signals
Blue Plug
Goes To
Wire Color
G8; Dash Wiring Harness; Dimmer Switch Terminal 58b (A/T only)
Gray/Blue
Intermittent Wiper Relay Terminal 53S; Intermittent Wiper Switch Terminal
Green
53
Up-shift Relay Terminal L; Up-shift Indicator Light
Blue/Yellow
Oil Pressure Warning System; G6; D1
Blue/Black
D9; Intermittent Wiper Switch Terminal 53b
Green/Yellow
D17; Intermittent Wiper Switch Terminal 53e
Green/Black
Emergency Flasher Switch Terminal R to Turn Signal Switch; C8; D25; E11
Black/Green
Ignition Switch Terminal 15; Airbag Control Unit Terminal 18 (1990+)
Black
M1, G7
White/Black
Emergency Flasher Switch Terminal 49a to Turn Signal Switch; Flasher
Black/White/Green
Relay Terminal 49a
Emergency Flasher Relay (internal)
Intermittent Wiper Relay Terminal J; Intermittent Wiper Switch Terminal J
Brown/Black
Fuse 19; Emergency Flasher Switch Terminal 15
Black/Blue
E7
C12; E-brake Warning Light Switch
Blue/Brown
Battery Warning Light; G4; C2; D4
Blue
Turn Signal Indicator Light; A10
Blue/Red
Emergency Flasher Switch Terminal 49; Flasher Relay Terminal 49
White
Intermittent Wiper Relay Terminal T; Intermittent Wiper Switch Terminal T;
Green/Red
D5; G10; C9
Emergency Flasher Switch Terminal L to Turn Signal Switch; C19; E6; D11
Black/White
Page 10 of 18
Fuse 21; Fuse 22; Headlight Dimmer/Flasher Switch Terminal 56b
Canada 1990: M2; Headlight Switch Terminal TFL via DRL Resistor
Canada 1991+: M2; DRL Relay via DRL Resistor; Headlight Switch Terminal
TFL
Fuse 13; Rear Defroster Switch
Fuse 14; HVAC Blower Fan; Headlight Switch Light
Light Switch Terminal 58; Fuse 7
G5; G2; D7; L1; Console Gauges
A/T 1990+: Relay 6
G9; E1
Up-shift Relay Terminal 2 (internal)
Hi-beam Indicator Light; C16
A21 Headlights
A22 Rear Window Defroster Switch Power
A23 HVAC System
A24 Light Switch
A25 Horns; Gauges
A26 Lights
A27 Up-shift System
A28 Instrument Cluster
B
Pin
B01
B02
B03
B04
B05
B06
B07
Dashboard Wiring Harness
Description
B08 Ignition System
B09 Wiper Switch Power
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
B25
B26
B27
B28
Load Reduction/Ignition System
Cigarette Lighter, Radio, Amplified Speakers
Instrument Cluster
Headlights
Key-In Power
Gauge Cluster (Oil Pressure Light Controller)
Fog Light Switch
Seat Belt Warning System
Up-shift System
Instrument Cluster
Fog Light Switch
High Beam Switch, high beam output
Light Switch Power
Horns
Light Switch
Light Switch
Emergency Flasher Switch Power
C
C01
E13
E10
Fuel Gauge; E5
E4
(no pin)
Fuel Pump Relay Terminal 8 (internal)
Coolant Temperature Gauge; D29
Ignition Switch Terminal 50; Fuel Pump Relay Terminal 7 (internal); Airbag
Control Unit (1990+); C18; D24
D20; Intermittent Wiper Relay Terminal 15; Intermittent Wiper Switch
Terminal 53a
Load Reduction Relay Terminal 86; Light Switch Terminal X
Fuse 3; E3; B12; Cigarette Lighter; Radio
Digital Clock; E3; B11
Headlight Dimmer/Flasher Switch
K5
High Oil Pressure Switch
Fuse 6, C22
Seat Belt Relay Terminal L; Seat Belt Warning Light
Upshift Relay Terminal G (internal); D3
Up-shift Relay Terminal 1; Tachometer; Fuel Pump Relay (internal); D26
Fog Light Relay Output
E15; Rear Window Defroster Switch Terminal 86
Fuse 9; Fuse 10; Headlight Dimmer/Flasher Switch Terminal 56a
Light Switch Terminal 30
C11
C15; L2
B27; A24; Fuse 8
B26; A24; Light Switch Terminal 58; Fuse 20; Relay 7 (internal)
Fuse 4; Emergency Flasher Switch Terminal 30
Engine Compartment/Management, Left
Pin
Description
Brake Light Switch, Cruise Control, A/T Shiftlock
Control Unit
C02 Alternator Exciter Circuit/Charging System
C03 Brake Lights
C04 Running Lights ~ Left
C05 Headlights ~ Lo-beam
C06 Headlights ~ Lo-beam
C07 Radiator Cooling Fan
Black
Blue/White
Wire Color
Green/White
Violet/Black
Yellow/Red
Red/Black
Black/Gray
Black/Yellow
Red/Gray
Red
Red/Yellow
Yellow
White/Yellow
White/Violet
Red/Black
Green/Yellow
White/Green
White
Red
Brown/Black
Gray/Green
Gray/Green
Red/White
Yellow Plug
Goes To
Wire Color
E16; Brake Light Switch
A/T 1990+: Shift Lock Control Unit; E16; Brake Light Switch
Cruise Control: E16; Brake Light Switches; Vacuum Valve; Cruise Control
Control Unit
D+ on Alternator; A16; D4
Fuse 2; Brake Light Switch
Cruise Control: C1; Fuse 2; Brake Light Switches
E9; Front Parking Light; Side-marker Lights
Fuse 21; Left Headlight
Fuse 22; Right Headlight
Fuse 1; Air Conditioning Relay Terminal 4 (internal); Radiator Fan Thermo
Switch
Page 11 of 18
Black/Yellow
Black/Red
Gray/Green
Red Plug
Goes To
Fog Light Switch (Europe Only)
Instrument Cluster
Fuel System
Coolant Temperature Warning System
Yellow
Red/Black
Blue
Red/Yellow
Gray/Black & Gray
Yellow/Black
Yellow
Red
C08
C09
C10
C11
C12
C13
C14
C15
C16
C17
Windshield Washer
Brake Warning System
Horns
Running Lights ~ Right
Horns
Headlights ~ Hi-beam
Headlights ~ Hi-beam
Turn Signal Light ~ Right Front
G10; D5; A19; Windshield Washer Pump
(no pin)
B24
A15; Brake Fluid Level Switch
Fuse 16; Horns
Fuse 8; E18; Front Parking Light; Side-marker Lights
B25; Horns (ground)
Fuse 9; Right Headlight(s)
Fuse 10; Left Headlight(s)
Hot-start Pulse Relay Terminal 50; E-brake Warning Light; Thermo Time
Switch; Fuel Pump Relay (internal); B8; D24
Turn Signal Light ~ Left Front; A20; E6; D11
Fuse 15; D16; Back-up Light Switch; Cooling Fan After-run Control Unit
(1990+)
Back-up Light Switch; E12 (A/T 1990+); D19 (A/T 1990+)
Fuse 6, B16
C18 Warning Lights
C19 Emergency Flashers/Turn Signals
C20 Back-up Lights
C21 Back-up Lights
C22 Fog Lights
D
Engine Compartment/Management, Right
Pin
Description
D01 Low Oil Pressure Switch
D02 Fuel System
D03
D04
D05
D06
D07
D08
D09
D10
D11
D12
D13
D14
D15
Up-shift Indicator
Alternator Exciter Circuit/Charging System
Intermittent Wipers
Idle Stabilizer Control Unit; Seat Belt Warning;
Oil Temperature Gauge
Up-shift Indicator
Wiper Motor ~ High Speed
Wiper Motor ~ Low Speed
Fuel System
Resistance Wire, Coil Pin 15 (Europe only)
D16 Back-up Lights
D17
D18
D19
D20
D21
D22
Wiper Motor Switch
Back-up Lights
Wiper Motor Switch
Oil Pressure Warning System
Wiper Motor
D23 Ignition System
D24 Ignition System
D25 Emergency Flashers/Turn Signals
D26 Ignition System
D27 D28 D29 Coolant Temperature Warning System
Red/Black
Black/White
Black
Black/Blue
White/Yellow
White Plug
Goes To
Oil Pressure Switch (1.8 bar); G6; A4
Fuse 17
Digifant I: Fuse 17; R1
Up-shift Switch Terminal 5; B18
Oxygen Sensor Mileage Counter Box; A16; G4; C2
A19; G10; C9
(no pin)
Wire Color
Blue/Black
Black
White/Green
Blue
-
G2; G5; A25; Coolant Low-level Control Unit (A/T 1990+)
Black/Blue
Up-shift Vacuum Switch; Up-shift Control Unit Terminal US
A5; Wiper Motor Terminal 53b
(no pin)
E6; C19; A20
Wiper Motor Terminal 53; Intermittent Wiper Relay Terminal 53
Fuel Pump Relay Terminal 6 (internal); Digifant Control Unit Terminal 3
(no pin)
D23
C20
1990+ A/T: Fuse 15; Back-up Light/Starter Cut-out Switch; Shift Lock
Control Unit; Starter Interlock Relay
A6; Wiper Motor Terminal 53e
(no pin)
E12; C21; Back-up Light Switch/Starter Cut-out Switch (A/T only)
Fuse 11; Wiper Motor Terminal 53a
Oil Pressure Switch (.3 bar); B15
Main Panel Ground
Coil Terminal 15; D15
Digifant I: D25; Ignition Coil Power Stage
B8; C18; Fuel Pump Relay Terminal 7; Starter Terminal 50, or Auto. Trans.
Starter Interlock Relay Terminal 31
C8; E11; A7
Ignition Coil Terminal 1; Idle Stabilizer Relay Terminal 1; Fuel Pump Relay
(internal); B19
(no pin)
(no pin)
Coolant Temperature Gauge Sender; Coolant Low-level Control Unit
(1990+); B7
Page 12 of 18
Black/Green
Green/Red
Blue/Red or Blue/Brown
Black/Yellow
Gray/Red & Gray
Brown
White
White/Black
White/Red
Green/Yellow
Green
Yellow/Blue and Red/Yellow
White/Violet
Black
Green/Black
Black/Blue
Black/Gray
Yellow
Brown
Black
Red/Black or Red
Red/Black
Yellow/Red or Yellow/Blue
E
Pin
E01
E02
E03
E04
E05
E06
E07
E08
E09
E10
E11
E12
E13
Rear Wiring Harness
Description
Lights
Interior Lighting
Instrument Cluster
Heated Seats
Running Lights ~ Left
Rear Fog Light (Europe Only)
Back-up Lights
-
E14 Fuel System
E15
E16
E17
E18
Brake Lights
Running Lights ~ Right
G
Individual Circuits
Pin
Description
G01 Power Windows; Heated Seats
G02 Idle Boost Control
G03 Heated Seat Control Units
G04 Alternator Exciter Wire
G05 Seat Belt/Brake Warning System
G06 Oil Pressure Warning System
G07 G08 Interior Lighting
G09 Lights
G10 Headlight Washer Relay (Europe only)
H
Pin
H01
H02
H03
H04
H05
H06
Fuse 12; E8; G3
D7; G5; A25; Idle Boost Control Unit
A/T only: G5; D7; A25; Fuse 18; Back-up Light/Starter Cut-out Switch
Fuse 12; E8; G1; Heated Seats Control Units; Heated Seats Switch
A16, D4
G2; D7; A25; Fuse 18; Seat Belt Indicator Light; E-brake Indicator Light
(A/T 1990+)
D1; A4
A9; M1
A1; Instrument Cluster Wiring Harness; A/T Shift Console Light; Power
Convertible Top Switch Light
A26; E1
A19; D5; C9
K05 Ignition Switch Key-In Power
White & Black
Black/Red
Gray/Red
Wire Color
Black
Black/Red and Black
Black
Gray/Blue
Green/Red
Wire Color
Red/Black
Red/Black and Black/Yellow
Red
Green
Black
Red/Black and Black/Yellow
White
Goes To
Seat Belt Relay Terminal G; Seat Belt Switch
Seat Belt Relay Terminal 2 (internal)
Relay Panel Power
Seat Belt Relay Terminal 86; Door Contact Switch (left); Seat Belt Switch
Ignition Switch Terminal SU; Seat Belt Warning Relay Terminal 85; Power
Convertible Top Switch; Relay 5 (internal)
Page 13 of 18
Red/Yellow and Red/White
Brown Plug
Goes To
A/C Relay; Fuse 1; C7; Cooling Fan Thermo Switch; Cooling Fan
HVAC Fan Switch Speed 1; HVAC Blower Fan; A/C Relay; H6
A/C Relay; Battery via Fuse 23
A/C Relay; A/C Thermostat; A/C Compressor Clutch; Idle Stabilizer Valve
HVAC Fan Switch Speed 4; A/C Relay (internal)
HVAC Fan Switch Speed 1; HVAC Blower Fan; A/C Relay; H2
Seat Belt/Coolant level Warning Wiring Harness
Description
Wire Color
Gray/Green
Red
Violet/Black
Black/White
Black/Gray
Gray/Black
Green/White
Black/Green
Black
-
Goes To
HVAC Wiring Harness
Description
Radiator Cooling Fan
HVAC System
HVAC System
HVAC System
HVAC System
HVAC System
K
Pin
K01
K02
K03
K04
Black Plug
Goes To
License Plate Lights; Trunk Light; Fuse 20
Relay 11
Courtesy Light; B11; B12
B4
Fuel Gauge Sending Unit; B3
Turn Signal Light ~ Left Rear
A14; Relay 11
Relay 11; G3; G1
Fuse 7; C4; Tail Light
B2
Turn Signal Light ~ Right Rear
D19; C21; Back-up Lights; C21 (A/T 1990+)
B1
Fuel Pump; Transfer Fuel Pump; Aux. Air Regulator; Control Pressure
Regulator; Fuse 5 to Fuel Pump Relay; Oxygen Sensor (1988+)
B21; Rear Window Defroster Element
C1; Brake Lights ~ Left, Right, High-Mount in Trunk Lid
C14; Tail Light
Wire Color
Gray/Red
Gray & Black/Green
Brown/Red
L
Pin
L01
L02
L03
L04
Horn Wiring Harness
Description
Horns
Horns
Horns
Horns
M
Description
Goes To
Individual Circuit, Fuel Injection
Description
N
Fuel System Power ~ CIS
N
Fuel System Power ~ Digifant
P
Red Plug
Goes To
Fuel Pump Relay Terminal 87 and Fuse 5 (internal); Fuel Injection Power Supply
Relay Terminal 86
Fuel Pump Relay Terminal 87 and Fuse 5 (internal); Fuel Injectors
Individual Circuits, Battery Power
Description
Battery
Automatic Transmission (1990+)
Power Seat Height Adjust Fuse
Power Windows
Ignition Switch Power
Fuel System Power ~ CIS
Headlight Washer Relay (Europe only)
R
Wire Color
Red/Black
Red
-
Goes To
Wire Color
Red
Red
Red
Red
Red
Red
Red
Main Fusebox Battery Power
Starter Interlock Relay Terminal 30
Fuse 37 (Relay Position 17); Power Window Control Unit
Ignition Switch Terminal 30
Fuel Injection Power Supply Relay Terminal 30
ECU Power Supply Wiring Harness
Pin
Description
R01 Airbag System
R02 Digifant ECU, Injectors
Black Plug
Wire Color
-
A9; G7
A21
N
Pin
P
P
P
P
P
P
P
Wire Color
Black
Brown/Black
Brown
Brown/Blue
A25; Horns Relay Terminal 86
B25; Horns Relay Terminal 87
Horns Relay Terminal 30; Dash Wiring Harness
Horns Relay Terminal 85; Horn Button
Steering Column Switch or Headlight/Dimmer Switch Wiring Harness
Pin
M01 M02 Headlights
Pin
Black Plug
Goes To
Green Plug
Goes To
Digifant Relay Terminal 86; Airbag Control Unit; D2
Digifant Control Unit Terminal 14; Digifant Relay Terminal 87
Wire Color
Black
Black/Yellow
Please consult wiring diagrams for your particular car for precise wire routing and colors.
Page 14 of 18
How To Read Current Flow Wiring Diagrams
1
2
3
16
15
14
4
5
6
13
12
7
11
8
9
10
Page 15 of 18
1 -
Circuits
15: Originates at ignition switch. Supplies power when ignition switch is in ON or START position.
X: Load-reduction relay circuit. Originates at ignition switch. Supplies power only when ignition switch is in ON position. Circuit is
interrupted when starter is actuated.
30: Battery positive (+) voltage. Supplies power whenever battery is connected (i.e. not dependent on ignition switch position).
31: Ground; battery negative (-).
2 -
Connection designation ~ relay control module on relay panel
Shows the individual terminals in a multi-point connector.
3 -
Relay position number
4 -
Reference of internal connection continuation
Letters indicate where connection continues on the previous and/or following diagram
5 -
Connections at rear of panel
Designations of each pin connection. For example, C13 is referring to connector C, pin number 13. See page 3.
6 -
Wire size and wire color(s)
Color abbreviations are listed in a key on each diagram.
7 -
Terminal designation on component
8 -
Component
In this example, from left to right, the components are: Horns, horn button, fan motor, window heating element.
9 -
Ground connection locations
Locations are defined in the diagram index.
10 -
Current track number
11 -
Wire connection designation in wire harness
Locations are defined in the diagram index.
12 -
Connector in wire or wire harness
T1 = 1-point terminal connector; T2 = 2-point terminal connector; etc. Locations are defined in the diagram index.
13 -
Current track continuation
Number in box indicates the current track number where wire is continued.
14 -
Internal connection inside relay panel
D7 connects internally to G2, G5 and A25.
15 -
Terminal number on relay
85 = Ground side of switching relay
86 = Power-in side of switching relay
87 = Relay switch contact
87a = Normally closed switch contact
87b = Normally open switch contact
16 -
Fuse
Indicates fuse position number and amperage.
Multi-point
connector at
component
Internal connections
in component
How the horn circuit works (use illustration on
previous page): Pressing the horn button closes the
contacts sending an electrical signal to relay 6, which
triggers terminal 30 to contact terminal 87,
completing the path to ground, which closes the
circuit sending power to the horns making them honk.
Wire connection ~
fixed
Page 16 of 18
Wire connection ~
detachable
Wire connection in
wiring harness
Light bulb
Ground Locations
1980-1986
Main ground cables/straps:
 Battery to the left frame rail; frame rail to the transmission
o M/T: On bell housing to the right and rear (as looking at it from front of car) of clutch cable:
o A/T: On mounting stud behind ignition distributor:
 Valve cover to the ignition coil bracket
 Fender to hood
 A/C compressor to battery (or engine block)
 Ignition Control Unit to battery
Ground





locations:
Fuse/relay panel
Steering column
Cold-start valve (CIS only)
Trunk, rear left and right
Dash wiring harness
1987-1989
 Battery to the left frame rail; frame rail to the transmission (see examples above)
o M/T: On bell housing to the right and rear (as looking at it from front of car) of clutch cable
o A/T: On mounting stud behind ignition distributor
 Fender to hood
 A/C compressor to engine block (or alternator)
 Ignition Control Unit to battery
Ground






locations:
Fuse/relay panel
Steering column
Cold-start valve (CIS only)
Dash wiring harness
Engine bay, front left and right ('88+)
1990-1993
 Battery to the left frame rail; frame rail to the transmission (see examples above)
o M/T: On bell housing to the right and rear (as looking at it from front of car) of clutch cable
o A/T: On mounting stud behind ignition distributor
 Fender to hood
 Digifant ECU to firewall
 A/C compressor to engine block (or alternator)
Ground






locations:
Fuse/relay panel
Instrument cluster wiring harness
Steering column
Engine bay, front left and right
Horns ('91+)
Page 17 of 18
Wire Size Conversions
Metric Size
American Wire
Gauge (AWG) Size
0.35
22
0.5
20
0.75
18
1.0
16
1.5
14
2.5
12
4.0
10
6.0
8
16.0
4
25.0
2
General wire size guidelines
16 gauge: 10 amps max
14 gauge: 15 amps
12 gauge: 20 amps
10 gauge: 30 amps
8 gauge: 40 amps
If your runs are going to be longer than about 30 feet of total
wire length, bump up to the next size wire to reduce voltage
drop on a 12V system.
Page 18 of 18

Volkswagen Cabriolet DIY Guide

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