Diagnostic Aids
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The following conditions may cause an intermittent:
- Intermittent short to ground or open in White wire between BCM and rear defogger relay.
- Poor connections at BCM, instrument panel electrical center or rear defogger relay.
- Internal open or short in rear defogger relay.
If White wire between BCM and rear defogger relay is shorted to ground, rear defogger will stay on at all times. If White wire between BCM and rear defogger relay is open, rear defogger will stay off at all times.