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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 456 (Fixed And MOVEABLE Windows) >> Diagnostic Information and Procedures >> DTC B3819, B3820, B3822, or B3823 >> Circuit/System Testing

Circuit/System Testing

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  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.
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