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Home >> Pontiac >> 2008 >> Torrent GXP, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 87 (Lighting Systems) >> Diagnostic Information and Procedures >> Courtesy Lamps Malfunction >> Circuit/System Testing >> Courtesy Lamps Malfunction - with UUC

Courtesy Lamps Malfunction - with UUC

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X3 and X4 harness connectors at the BCM.
  2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminals listed below and ground:
    • Terminal 2 X3
    • Terminal 2 X4
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, connect the X3 and X4 harness connectors at the BCM.
  4. Disconnect the harness connector at the inoperative courtesy/reading lamp assembly.
  5. Ignition OFF, scan tool OFF, doors CLOSED, interior lamps OFF, test for less than 5.0 ohms between the appropriate ground circuit terminal listed below and ground.
    • Dome lamp terminal B
    • Overhead console Courtesy/reading lamps terminal B
    • Cargo lamp terminal D
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  6. Ignition ON, verify that a test lamp illuminates between the appropriate control circuit terminal listed below and ground.
    • Dome lamp terminal A
    • Dome lamp switch terminal C
    • Overhead console courtesy/reading lamps terminal A
    • 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.
  7. Remove the INT LAMPS fuse from the I/P fuse block and verify the test lamp turns OFF.
    • If the test lamp remains illuminated, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  8. Install the INT LAMPS fuse at the I/P fuse block.
  9. Ignition OFF, doors CLOSED, operate the dome lamp switch between the ON and OFF positions. The cargo lamp, dome lamp, and overhead console courtesy/reading lamps should turn ON and OFF.
    • If the courtesy lamps do not turn ON and OFF when commanded, test or replace the dome lamp switch.
  10. If all circuits test normal, replace the inoperative courtesy/reading lamp assembly.
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