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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 879 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> Windshield Wiper Washer System Malfunction >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. A short to ground in the following circuits will open the WPR fuse:
    • Ignition 1 voltage
    • Windshield wiper motor relay coil supply voltage
    • Windshield wiper switch high signal
    • Windshield wiper motor low speed control
    • Windshield wiper motor high speed control
  2. A short to B+ on any of the wiper/washer switch signal circuits will open the ground trace in the wiper switch.
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