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Bad ground cable
I hope this post helps at least one person. I won’t go into all of my problems getting to this point, just the end result. I have a 99 Vantare H3, but this can affect all coaches. The ground cable from the engine block to the chassis broke so the 24V’s needed to get to the chassis so it took any route possible. In my case it tried to go through any and all braded lines. In doing so, I would lose air in the aux tank which ment the airbags for the radiator fan wouldn’t operate and the coach would go into overheat. It also took out my tach and speedometer. End result……..over $5000.00 at Prevost plus several service calls on the side of the interstate and a 100 mile tow to Prevost!!!! Please check your ground cables! Also, don’t just look at it, pull on it. Looking at mine it looked like it was ok but when they pulled on it it came apart. Hope this saves someone the BS I went through. Thanks, Cliff
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5 Replies
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Great info, and great post.
Thanks Cliff
Bill S.
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Cliff, for faster check, can you please post a pic of the cable/location?
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Thanks for the post.
Would it make sense to install a backup ground cable for redundancy?
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I thought about it but decided the 1st one lasted 16 years so it might just be a knee jerk reaction. It won’t hurt if you decide. Cliff
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Not to dimish the report of the defective ground strap, but to indicate this is the first time in my memory anyone has posted this problem.
Having said that I don’t think it is a bad idea for all of us to do a check to verify we do not have such a potential problem. At one time if my memory is not too far gone the 8V92 engines with the gear driven alternator had an issue with field wires because not enough slack in the wiring was provided and they would fail at the terminal.
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