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Old 07-22-2012, 08:48 PM   #1
70CHEVYBB
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fuel gauge not reading with lights on

I had to pull my 72 tank out that had a hole in it. I replaced it with a 70 tank and sending unit. When I turn on the headlights the gas gauge drops to empty. I have checed the wire for crackes or grounding out some where. Any ideas????
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Old 07-22-2012, 09:38 PM   #2
Todd Hepler
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Re: fuel gauge not reading with lights on

I had this problem with mine last weekend- it was a burned ground trace on the cluster circuit board.

Easy fix was to run a ground wire from the 1/4" ground lug screw on the gauge cluster to a convenient spot in the dash.
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Old 07-22-2012, 09:52 PM   #3
70CHEVYBB
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Re: fuel gauge not reading with lights on

i will look at that, thanks
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Old 07-22-2012, 10:14 PM   #4
VetteVet
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Re: fuel gauge not reading with lights on

Pull the panel lights fuse out of the fuse panel and see if it still does the same thing.
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