Wiring diagram 87 w201(anti lock brakes)

[lanny]

Good day Guys. am in a bind here and need help. On start up all dash lights go out but after a few minutes the anti-lock light comes on and stays on,it doesn't go out until the car is switched off. On investigation I noticed the differential wiring not attached and there is no wires hanging loose anywhere under the car. Can someone provide the wiring diagram for the system so I could trouble-shoot it Thanks a mil..

[Dr. Sternschnuppe]

See the attached image (sorry for low resolution ).
1 - ABS control unit
2 - ABS hydraulic unit
3 - return pump
4 - rear axle solenoid valve
5 - front right wheel solenoid valve
6 - front left wheel solenoid valve
7 - return pump relay
8 - solenoid valves relay
9 - battery
10 - overvoltage protection relay
11 - front left wheel-speed sensor
12 - front right wheel-speed sensor
13 - rear-axle wheel-speed sensor
14 - ABS malfunction indicator lamp

Ciao!