Diagnostic Aids

WARNING: This page is about a different car, the 2000 Chevrolet Corvette and 1999 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Following conditions may cause an intermittent malfunction:

Intermittent short to ground in right window motor circuits (Dark Blue wire or Brown wire).
Right window motor is shorted to ground internally.
Right window motor circuit is shorted to voltage, allowing operation in one direction only in certain directions depending on circuit affected.

Using scan tool, select RDCM inputs and monitor window motor load while operating right window up and down. If scan tool displays motor load a zero, check right window motor circuit for opens.