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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1293 (Lighting Systems) >> Diagnostic Information and Procedures >> Courtesy Lamps Malfunction >> Circuit/System Testing >> Door Open Switch Malfunction - Rear

Door Open Switch Malfunction - Rear

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the inoperative rear door latch assembly.
  2. Interior lamps OFF, test for less than 10.0 ohms between the appropriate ground circuit terminal listed below and ground.
    • Left rear door latch assembly ground circuit terminal 6
    • Right rear door latch assembly ground circuit terminal 3
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify a test lamp illuminates between the appropriate door open switch signal circuit terminals listed below and ground.
    • Left rear door open switch signal circuit terminal 5
    • Right rear door open switch signal circuit terminal 2
    • If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and ground. Verify the courtesy lamps illuminate and remain illuminated.
    • Left rear door open switch signal circuit terminal 5
    • Right rear door open switch signal circuit terminal 2
    • If the courtesy lamps do not remain illuminated, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, replace the inoperative rear door latch assembly.
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