I have had trouble with my glow plug relay . Sometimes not working, short glow time ect. Verified that when the light was not on the plugs were not on either. all plugs good, fuse ect. I bought a used relay and installed it, now rhe relay works but the light doesn't light. before I pull the instrument panel I would like to test the circuits to the light from the relay. The question is what wire goes from the relay to the indicator light. I want to test this circuit to see if it is the lamp or the relay. I find it hard to believe that the lamp just happened to burn out when i changed the relay, but you never know.
Jon J
81 240D
325000 mi.

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Jon J.
81 240D