PeachParts Mercedes-Benz Forum - View Single Post - Glow plug light off, doesn't feel like they're working. 87 300D

Crazy_Nate · #4 11-24-2010, 11:18 AM

Thanks for the reply John.

I don't think that it's a glow plug issue. The cabin light didn't dim when it happens. I finally got the car started (glow plug light came on, started pretty easily, slight stumbling).

When it happens (no glow plug light), I can crank and crank and crank, and it doesn't feel like there's a single bit of response (no firing, stumbling, etc). I can try replacing the strip fuse, but I might not be able to experience whether or not that fixes anything until it randomly happens again (which is usually exactly when I can't get a ride to work or to pick up parts). I'm looking at just replacing the relay and keeping a strip fuse on hand.

I can check the plugs now that I'm at work. I'm basically pulling the glow plug wiring harness from its connection at the relay and checking the resistance between the individual pins and the nearest ground point (engine block?). Sound right? I'll post up the resistances when I check it.