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 short to battery positive voltage in the backup lamp relay control circuit.
- There is low resistance in the relay coil.
- There are poor connections at the BCM, the underhood fuse center, or the backup lamp relay terminals.
- The backup lamp relay is shorted to battery positive voltage internally.
- If the BCM is open internally, or if the backup lamp relay control circuit is shorted to voltage 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.