LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 191 (Fixed & MOVEABLE Window Systems) >> Diagnostic Information & Procedures >> DTC B3819, B3820, B3822, or B3823 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
  2. Ignition ON, test for greater than 9 volts between the signal circuit terminal A and ground while commanding the rear window UP by using the window switch on the driver master control.
    • If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
  3. Test for greater than 9 volts between the signal circuit terminal C and ground while commanding the rear window DOWN by using the window switch on the driver master control.
    • If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
  4. If all circuits test normal, replace the rear window switch.
scientia non olet · About LEMON Manuals