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Old 03-28-2012, 10:24 AM
CF Beginner
Join Date: Mar 2012
Location: Kentucky
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Default Battery Gauge

Yesterday I was towing with my 95 Z71 and when I stopped at a light, I looked at the battery gauge. The needle was going back and forth in time with the turn signal. It was only a couple of marks back and forth, but I have never seen this before. What would cause this? I just had the alternator tested and it was okay; the battery is pretty new. Could the alternator be okay for regular use but not strong enough when the trailer is plugged in? It is the original alternator. Thanks!
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Old 03-28-2012, 12:13 PM
CF Pro Member
Join Date: Dec 2011
Posts: 672

That's caused by an "iffy" ground to the instrument cluster. Check all your body grounds.

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Old 03-28-2012, 01:04 PM
justimagination's Avatar
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Join Date: Mar 2012
Location: Monroe, Georgia USA
Posts: 109

Just a suggestion, make sure you have a seperate ground wire from the trailer wiring to the vehicle, the ball mount is not a perfect ground. Good luck and travel safe.
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Old 03-28-2012, 02:03 PM
CF Beginner
Join Date: Mar 2012
Location: Kentucky
Posts: 25

Thank you for your help! I just had to have the truck's wiring repaired and a new plug put in for the trailer. He wasn't sure exactly what I needed since the trailer wasn't there. He asked me some questions about the ground wire, but I had no clue. Guess I will run it back up there this weekend!
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