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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 96 (Fixed & MOVEABLE Window Systems) >> Diagnostic Information and Procedures >> Power Window Inoperative - Passenger Door (Rear) >> Circuit/System Testing

Circuit/System Testing

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Rear Power Window Inoperative

  1. Disconnect the rear power window switch.
  2. Verify that a test lamp illuminates when connected from battery voltage to the ground circuit terminal in the switch connector.
    • If the test lamp does not illuminate repair the ground circuit for an open/high resistance.
  3. Ignition on and the rear window lockout function off, verify that a test lamp illuminates when connected from the lockout signal circuit to ground.
    • If the test lamp does not illuminate test the lockout signal circuit for an open/high resistance. If the circuit tests normal replace the BCM.
  4. Verify that a test lamp illuminates when connected from the switch supply circuit to ground.
    • If the test lamp does not illuminate repair the supply circuit for an open/high resistance or short to ground.
  5. Disconnect the power window motor connector and connect the power window switch connector.
  6. Verify that a test lamp illuminates when connected across the window motor control circuit terminals while the switch is operated in both directions.
    • If the test lamp does not illuminate test the motor control circuits circuit for an open/high resistance or short to ground. If the circuits test normal replace the power window switch.
  7. If the circuits test normal replace the power window motor.

Rear Power Window Inoperative from Driver Door Switch

  1. Install a scan tool and display the Driver Door Switch Inputs data list.
  2. Activate the rear window switches in both directions and verify that the rear window switch parameters display the correct parameter in relation to the actual switch position.
    • If the switch parameter is incorrect, replace the DDS.
  3. Activate the rear window lockout function on and off and verify that the scan tool parameter displays on and off.
    • If the rear window lockout parameter is incorrect, replace the DDS.
  4. Display the BCM Doors data list.
  5. Activate the rear window switches in both directions and verify that the rear window switch parameters display the correct parameter in relation to the actual switch position.
    • If the switch parameter is incorrect, replace the BCM.
  6. Disconnect the inoperative rear power window switch connector.
  7. Verify that a test lamp illuminates when connected from the up and down signal circuits to ground while the DDS rear window switch is operated up and down.
    • If the test lamp does not illuminate test the appropriate signal circuit for an open/high resistance. If the circuit tests normal replace the BCM.
  8. If the circuits test normal replace the rear door power window switch.
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