The rear wiper / washer system has three operating modes ( delay, normal and wash). This system incorporate a wiper motor, washer pump, a solid-state control board in the rear wiper/washer module, and the rear wiper/washer switch. The system will operate any time the ignition is in ACC or RUN.

Voltage is provided to the switch through CKT 393 (WHT). When the switch is placed in the DELAY position, voltage is provided to the rear wiper motor through CKT 391 (GRY) and to the rear wiper/washer module through CKT 97 (LT BLU). Since the rear wiper/washer module is grounded through CKT 150 (BLK) to G400, the wiper motor takes a single sweep and returns to the park position until signaled by the rear wiper/washer module to make another sweep.

The solid state control board, in the rear window wiper/washer module, controls the time interval. This time interval is approximately 9 seconds and is non-adjustable.

In the ON position, the rear window wiper/washer switch supplies voltage to the wiper motor through CKT 391 (GRY) and to the rear wiper/washer module through CKT 97 (LT BLU), since the wiper motor is grounded through the rear wiper/washer module, the wiper runs at normal speed.

When the rear window wiper/washer switch is turned to OFF, the rear window wiper/washer motor runs at normal speed until the wiper blade reaches the PARK position. Then, the park/run relay opens and signals the rear window wiper/washer to stop the wiper blade immediately. The wiper blade remains in the PARK position.

The rear window wiper motor has a circuit breaker that protects the motor when the wipers are blocked. The resulting high current opens the circuit breaker which resets upon cooling.

When the rear window washer switch is pressed, voltage is supplied through CKT 392 (DK GRN) to the solid state control board in the rear window wiper/washer module. The rear window wiper/washer switch also supplies battery voltage through CKT 392 (DK GRN) to the rear window washer pump motor. This starts the wiper cycle and the wash cycle. The washer continues to run as long as the switch is held down. The solid state control board keeps the wipers on for six seconds after the washer goes off.

If the washer is switched on during DELAY operation, the wipers run in low speed for six seconds. When the wash cycle is completed, the wipers return to the DELAY operation.