System Diagram

Anti-Lock Brake System (Quattro)

Anto-Lock Brake System. Wiring Diagram:

Fuse/Relay Panel:

Auxiliary Relay Panel:

Additional Relay Panel:

Description Current Track
ABS combination relay 25-30
ABS control unit 1-27
ABS hydraulic unit 15-25
ABS return flow pump 22
ABS return flow pump relay 23-28
ABS solenoid valve, LF 17
ABS solenoid valve, R 15
ABS solenoid valve, RF 16
ABS solenoid valves relay 20, 21
ABS speed sensor, LF 10,11
ABS speed sensor, LR 8, 9
ABS speed sensor, RF 6, 7
ABS speed sensor, RR 4, 5
ABS switch 31-32
Brake lite switch 2
Cruise control switch 1
Differential lock indicator lite, F 36
Differential lock indicator lite, R 35
Differential lock indicator unit illumination lite 39-41
Differential lock switch, F 37
Differential lock switch, R 34
Dual horn relay 4

Wire connectors
T2 - double, gray, engine compartment
T2a - double, gray, under rear seat
T2b - double, yellow, behind instrument cluster
T2m - double, engine compartment left
T2n - double, engine compartment right
T2o - double, under rear seat, left
T2p - double, under rear seat, right
T3d - three point, behind console
T14/ - fourteen point, instmment cluster
T14a/ - fourteen point, instrument cluster
T14c - fourteen point, Kostal-connector -7-, foot well left
T35 - wire distributor, terminal 15
T38 - wire distributor, terminal 58
T40 - wire distributor, terminal 58d

Welded wiring harness points
A - terminal 30, wiring harness ABS
H1 - terminal 58d2, wiring harness instrument cluster
K1 - terminal 15, wiring harness ABS

Ground connectors
8 - behind instrument cluster
9 - engine compartment left
14 - under rear seat
35 - welded, wiring harness ABS