Rear Wiper/Washer System

Rear Wiper/Washer System Description and Operation

The rear wiper module controls rear wiper motor operation. Battery voltage supplied to the module is used to operate the wiper motor in all modes and to return the rear wiper arm to the park position after the ignition is turned off. Accessory voltage supplied to the rear wiper/washer switch is used to supply the rear window wiper and washer switch signal circuits. The rear wiper switch has two selections for the operation of the rear wiper. Each selection is a different delay mode. When moving the switch to the first notch, the rear wiper will activate on time and then will delay for 25 seconds and activate again. The second notch will activate the wipers one time and there will be a 6 second delay between sweeps. The rear wiper switch does not have a selection for running the wipers constantly on high or low speed. A second wash switch contact is used as the washer pump relay control circuit and the washer pump relay will remain energized for as long as the rear washer switch is pressed. The liftgate ajar switch signal circuit provides information to the rear window wiper module about the status of the liftgate. If the liftgate or liftglass is open the rear wiper operation is not performed.