Diagnostic Aids
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
If no problem is found, check for temperature related mechanical problems or binding. Components may not move freely in extreme heat or cold (ice) conditions.
An intermittent problem can be caused by misrouted harness, rubbed-through wire insulation or broken wire inside insulation.