Circuit Description
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
When operation of the rear wiper is selected, battery voltage from the rear wiper switch is applied to the rear wiper switch signal input of the body control module (BCM) circuit 94. The BCM responds by switching the rear wiper relay control circuit 2445 to ground. This action energizes the rear wiper relay, providing power to the rear wiper motor.