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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the appropriate harness connector at each component fed by the inadvertent power courtesy lamp circuit.
  2. Ignition ON, with a scan tool clear the DTC.
  3. Operate the vehicle within the Conditions for Running the DTC and verify the DTC does not reset.
    • If the DTC resets, test the inadvertent power courtesy lamp circuit for a short to ground. If the circuit test normal, replace the BCM.
  4. Connect each component one at a time and verify that the DTC does not reset as current.
    • If the DTC resets, test or replace the component responsible for setting the DTC.
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