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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 439 (Lighting System) >> Diagnostic Information and Procedures >> Door Sill Illumination Malfunction >> Circuit/System Testing

Circuit/System Testing

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WARNING:

DC and AC high-voltage is present. To reduce the risk of severe shocks and burns, the high-voltage system should be disabled any time service work is being performed on or around the high-voltage system. When in doubt, always disable the high-voltage system. The 12-volt system will still be active after the high-voltage system has been disabled.

  1. Ignition OFF, verify door sill plate lamp ground circuit 1150 is securely connected to the driver side kick panel ground stud.
    • If the door sill plate lamp ground circuit is not securely connected, repair the poor connection.
  2. Disconnect the X2 (blue) harness connector at the BCM.
  3. Using the appropriate test tool, connect a test lamp between the control circuit terminal 5 at the BCM and ground.
  4. Ignition ON, turn the door sill plate lamp ON and OFF by opening and closing the vehicle door. The test lamp should turn ON and OFF when changing between the selected states.
    • If the test lamp is always ON or OFF, replace the BCM.
  5. If all circuits test normal, replace the door sill plate lamp kit.
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