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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clear the DTC, ignition OFF, park lamp switch OFF, disconnect the park lamp pcb relay at the underhood fuseblock terminals C3 pin 16 and C2 pin 22
  2. Verify a test lamp illuminates between the negative battery terminal and the park lamp relay control circuit.
    • If the test lamp does not illuminate replace the underhood fuseblock.
  3. Test for a short to voltage in the park lamp relay control circuit.
    • If all circuits/connections test normal, replace the BCM.
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