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 LH turn signal monitor circuit.
- The turn signal switch or the hazard switch is shorted internally or is sticking.
- The BCM needs to detect voltage oscillations on the LH turn signal monitor circuit in order to de-energize the LH DRL relay. If the BCM detects continuous voltage on the LH turn signal monitor circuit, the BCM interprets this as a short to battery positive voltage. The BCM will continue with normal DRL operation, and the LF turn signal will remain inoperative.
- 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.