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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Saturn Outlook, 2008 GMC Acadia, and 2008 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the harness connector at the cargo lamp.
  2. Connect a test lamp between the courtesy lamp control circuit terminal C and ground.
    • If the test lamp illuminates, locate and repair a short to voltage in the courtesy lamp control circuit.
    • If the test lamp does not illuminate, locate and repair a short to ground in the courtesy lamp control circuit.
  3. If all circuits test normal, test or replace the BCM.
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