System Diagnostic Procedure

Glow Plug System Diagnostic Test Points:

Refer to the image for test lamp connections and glow plug system wiring harness test points referred to in the pinpoint tests. Perform only those services specified by the pinpoint tests.

Operation of the glow plug system is completely automatic. If, after completing a specific pinpoint test it is determined that a component must be replaced, the glow plugs should be disconnected until system has been re-checked to make sure the glow plug system works properly.