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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the information center telltale assembly.
  2. Ignition ON, verify that a test lamp illuminates between the appropriate voltage control circuit terminal listed below and ground:
    • Front - terminal 4
    • Rear - terminal A
    • If the test lamp does not illuminate, test the voltage control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module.
  3. Connect a test lamp between the voltage control circuit terminal 4 (front) or A (rear) and the appropriate LED control circuit:

    Front

    • Left amber LED - terminal 3
    • Center amber LED - terminal 2
    • Red LED - terminal 1

    Rear

    • Left amber LED - terminal B
    • Center amber LED - terminal C
    • Red LED - terminal D
  4. Command the appropriate LED ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the object alarm module.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the object alarm module.
  5. If all circuits test normal, test or replace the appropriate information center telltale assembly.
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