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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Lighting Systems) >> Diagnostic Information and Procedures >> Rear Compartment Lamp Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the rear compartment courtesy lamp.
  2. Ignition ON, verify a test lamp illuminates between the control circuit terminal A and ground.
    • If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  3. Ignition OFF, connect the harness connector at the rear compartment courtesy lamp. Disconnect the harness connector at the rear compartment lid latch.
  4. Test for less than 10 ohms of resistance between the ground circuit terminal 3 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  5. Ignition ON, verify the rear compartment courtesy lamp is not illuminated.
    • If the rear compartment courtesy lamp is illuminated, test the control circuit terminal 1 for a short to ground.
  6. Install a 5A fused jumper wire between the control circuit terminal 1 and ground. Verify the rear compartment courtesy lamp is illuminated.
    • If the rear compartment courtesy lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the test the rear compartment courtesy lamp bulb.
  7. If all circuits test normal, test or replace the rear compartment lid latch.
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