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.
An intermittent short to voltage or short to ground in right door switch illumination control circuit (Gray wire) between RDCM and right door switch may cause an intermittent malfunction.
Using scan tool, select RDCM data and DOOR SWITCH PAD ILLUMINATION while rotating interior light dimming switch. Switch illumination level varies from 0-100 percent based upon dimming level information RDCM receives on the serial data line. This checks if RDCM is able to receive correct dimming information from serial data line.