Can grounding point cause gauges to freak out? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 5 Old 06-02-2002, 11:24 PM Thread Starter
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Can grounding point cause gauges to freak out?

Got my car running finally after screwing with it all weekend. Turns out something isn't grounding correctly. I switched the locations of the grounding strap and the negative battery cable and finally got the car to run. They are both connected to a bolt on the front acc. bracket going into the head (or maybe not in the head).

Anyways, with the negative battery cable connected to the side of the timing chaing cover and the ground strap from the motor mount to the frame the car would not start. Just would power up and click. Sometimes it would click once, sometimes click-click-click. Once I switched the cables around it would start but the gauges are acting crazy. The oil pressure and temp gauges are maxed out. The voltmeter is showing really low and the lights are dim (inside and out). Also, when the car has a load on it, everything brightens up and starts to settle down. Is a poor ground still my problem? And do the stock grounding points have anything to do with why the gauges would act retarded? Any help would be great.


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post #2 of 5 Old 06-02-2002, 11:40 PM
 
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Definitely so, like I said in your other post the main grounding strap usually does it but you said yours was good. Try doing a search on gauge problems and ground problems. Might want to replace the battery terminal connectors if they are stock. I have heard about problems with them even if they look o.k.

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post #3 of 5 Old 06-03-2002, 08:01 AM Thread Starter
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I'm not so sure that my ground strap was okay as I replaced it with a different one and I got the car running again. I'm going to put another one on with some heavier wire and see if that works out. The terminals and cables are new so they for sure are good. I think I'm just not grounding well enough. Any other input?

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post #4 of 5 Old 06-03-2002, 11:45 AM
 
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Same syptoms mine had. Try what I wrote you in the other post.
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post #5 of 5 Old 06-03-2002, 04:41 PM
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I just fixed this exact problem. My main negative cable runs down to the timing cover, but I changed my motor mount to frame setup to this...

I ran a wire from a different timing cover bolt to an existing hole in the sheetmetal under the radiator (metal welded directly to front subframe). I put a bolt and nut through this hole to connect the wire to. I than ran another wire from the negative battery terminal to this same bolt, effectively chaining together engine, chassis, and battery. I'd been chasing this around since I had the engine out in January. Been perfect for a week.

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