Diagnostic Aids
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- The following conditions may cause an intermittent malfunction:
- There is an intermittent open or short to ground in the backup lamp relay control circuit.
- There is high resistance in the relay coil.
- There are poor connections at the BCM, the underhood fuse block, or the backup lamp relay terminals.
- The backup lamp relay is open or shorted internally.
- If the backup lamp relay control circuit is shorted to ground, the backup lamp will remain ON at all times. If the backup lamp relay control circuit is open, the BCM cannot provide output control for the backup lamps for UTD and approach lighting functions, but standard backup lamp functions will still operate normally.
- If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while moving related wiring and connectors. This can often cause the malfunction to occur. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.