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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows >> Diagnostic Information and Procedures >> DTC B3819, B3820, B3822, or B3823 >> Circuit/System Testing

Circuit/System Testing

B3819 00 or B3822 00

  1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
  2. Ignition ON, test for 0 volts between the power window switch rear up signal circuit terminal B and ground
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  3. Test for more than 10 volts between the power window switch rear up signal circuit terminal B and ground while commanding the rear window UP with a scan tool.
    • 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 the circuit tests normal, replace the rear window switch.

B3820 00 or B3823 00

  1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
  2. Ignition ON, test for 0 volts between the power window switch rear down signal circuit terminal C and ground.
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  3. Test for more than 10 volts between the power window switch rear down signal circuit terminal C and ground while commanding the rear window DOWN with a scan tool.
    • 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 the circuit tests normal, replace the rear window switch.
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