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Old 05-06-2011, 11:20 PM
Njdub Njdub is offline
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Join Date: May 2011
Location: Dallas,tx
Posts: 48
W115 300d glow plug light stays on

I just bought a 1976 300d. Fires up and runs great but the glow plug light doesn't go out. Today it was 74 outside and the light stayed on for 2 minutes. I shut her off after she fired up and the glow ug light was again on for ~2 mins.

I have the old loop style glow plugs which I just replaced. I have continuity through the glow plugs and I have power at the wire at the firewall.

The only things I have no checked are the ground strap at the 1st plug and the glow plug relay.

Could anyone lend me some advice here. I've googled the light staying on but no one seems to have this same problem.
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