Glow Plug System Diagnosis

If the system does not operate as described in "Circuit Operation," perform the Glow Plug System Check. It provides a fast way to determine if the glow plug system is working properly. Use this procedure, whenever there is doubt about correct system operation. Refer to System Diagnostic Tables / Diagnostic Tables. Testing and Inspection

CAUTION: Do not manually bypass the glow plug relay. Do not jump start with more than a 12 volt system. The glow plugs could be damaged.