Electrical Diagrams

Anti-Lock Brake System (Quattro)

Tracks 1-10:

Tracks 10A-20:

Tracks 21-30:

Tracks 31-40:

Fuse And Relay Panel:

Auxiliary Relay Panel:

Description Current Track
ABS combi-relay 24-30
ABS control unit 2-26
ABS hydraulic unit 14-24
ABS return flow pump 21
ABS return flow pump relay 22-24
ABS solenoid relay 19-20
ABS solenoid valve, LF side 17
ABS solenoid valve, LR side 15
ABS solenoid valve, RF side 16
ABS solenoid valve, RR side 14
ABS speed sensor, LF wheel 9-10
ABS speed sensor, LR wheel 7-8
ABS speed sensor, RF wheel 5-6
ABS speed sensor, RR wheel 3-4
ABS switch 31-32
ABS warn. lite 14
Alternator warn. lite 11
Brake lite switch 1
Differential lock switch, front 36
Differential lock switch illumination 39
Differential lock switch, rear 34
Front differential lock indicator lite 35
Rear differential lock indicator lite 34

Wire connectors
T1 - single, Scotch-lok, behind inst. panel
T1a - single, behind instrument panel
T1b - single, behind instrument panel
T2 - double, eng. compart., left
T2a - double, under rear seat, left side
T2b - double, eng. compart., right
T2c - double, under rear seat, right side
T2d - double, yellow, under instrument panel
T2m - double, under rear seat
T2n - double, in engine compartment
T3d - three point, brown, behind center console
T6 - six-point, brown, behind inst. panel
T8 - eight-point, green, behind inst. panel
T12/ - twelve point, at instrument cluster
T14/ - fourteen point, at instrument cluster

Ground connectors
8 - behind instrument panel
9 - engine compartment, left
14 - under rear seat
32 - behind instrument panel, left

Welded wiring harness points
E - terminal 15, inst. panel wiring harness
A2 - terminal 15, inst. panel wiring harness