LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 873 (Fixed & MOVEABLE Window Systems) >> Diagnostic Information and Procedures >> DTC B3820 >> 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. Disconnect the left rear window switch connector and connect a test lamp from the down signal circuit to ground.
  2. Ignition ON, verify that the test lamp illuminates when the left rear down switch on the DDS is activated.
    • If the test lamp does not illuminate test the left rear window down signal circuit for a short to ground. If the circuit tests normal replace the BCM.
  3. If the circuits test normal replace the left rear window switch.
scientia non olet · About LEMON Manuals