I have a nice '86 HMMWV driven regularly with only 9,000 miles. I drove it yesterday and it was fine. Today, the WAIT light won't do out and it will only turn over and not start even after waiting a couple of minutes. It's 65 degrees out so I'd think it would start anyway but... Thoughts? Thank you very much?
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Glow Plug Warm-up
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Hummer Guy
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It seems like you most likely have a bad smart start box, its more than likely that it fried your glow plugs. You should test your smart box and see if that's the issue. This is a pretty good video on how to test it
I'll definitely change the glow plugs too, but don't make an attempt to start it until you know your smart box is good or until you get another one. A bad smart box would fry your glow plugs pretty quick, even if its new plugs
Hummer Guy
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Around $70, its best to get the anti swell glow plugs too, also get the glow plug extractor because if your plugs are swell than they ain't going to come out by just unscrewing them, that extractor made the job a lot easier, its around $60 but if you got a few swollen plugs then its a must have
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Until you have a good starter box, do not hook up the glow plugs. You will only blow them out again. If you replace them, which you should, do not make the electrical connections. Not until you have a new control box