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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1642 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> Rear Wiper System Malfunction >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The rear wiper is controlled based on an input from the rear wiper/washer switch. When closed, the wiper ON and wiper DELAY switches provide a unique voltage signal to the rear window wiper motor indicating the desired speed. Each switch has a unique resistor that drops the voltage to a specified value which is interpreted by the rear window wiper motor as ON or DELAY. The rear wiper motor receives B+ voltage from the underhood fuse block and accessory voltage from the body control module (BCM).

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