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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 >> DTC B3922 >> Circuit/System Testing

Circuit/System Testing

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. Ignition OFF, disconnect the C3 harness connector at the turn signal/multifunction switch.
  2. Ignition ON, verify the scan tool Windshield Wiper Switch parameter is not Switch Fault.
    • If Switch Fault, test the windshield wiper switch low signal circuit terminal N for a short to ground. If the circuit tests normal, replace the BCM.
  3. If all circuits test normal, test or replace the turn signal/multifunction switch.
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