Wiper/Washer Systems: Testing
- Disconnect wiper motor connector at motor. Check for battery voltage at No. 15 (Violet/Black wire) on wiper control relay. Move wiper switch lever to lower position. Voltage should be present at Black/White wire at wiper motor.
- If voltage is present and motor is properly grounded, wiper motor should operate. If not, check fuse No. 5 (No. 11 on 528 and 535 series) and wiring (Violet/Black) if no voltage is present.
- Function control of solid state wiper control unit is by ground circuit completion at wiper/washer switch.