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Old 08-01-2010, 09:20 PM   #1
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Unhappy Battery Gauge

So finally fixed my issue with the tac meter and rpm's of course something else has to break.... Battery Gauge Looks Good On Start Up, after driving a few miles gauge drops to the left into the red. Check gauges light comes on. Any suggestions?

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Old 08-01-2010, 09:22 PM   #2
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Could be the alternator not charging properly while you drive, which in return is now draining the life from your battery. Thats why your gauge reading takes a plunge. You may need a new alternator, maybe even a new battery too.
How has your Jeep been starting lately? Any rough start ups?

If you have an Auto Zone near you they will do free alternator tests...Might as well take advantage.

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Old 08-01-2010, 09:25 PM   #3
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Has always started rough, but yesterday we put a brand spankin new alternator into it. so idk what it could be.
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Old 08-01-2010, 09:26 PM   #4
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Do battery test...your old beat up alternator could have been too hard on the battery. Might need a new one.
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Old 08-01-2010, 09:34 PM   #5
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Lol let me go from the start, brought it to autozone, told me i had a weak alternator, bought new alternator replaced it, tested battery, battery good, happy me, gauge's eat S***, unhappy me.
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Old 08-01-2010, 10:40 PM   #6
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lol, OK. Nevermind then, Im at a loss as well. Electronics and problems give me high blood pressure.
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Old 08-02-2010, 11:16 AM   #7
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OK I had a similar [roblem recently....Did a new alternator since it was old. Did a new belt it was old too. Did a new battery since it was losing power. Still had a gauge problem. Took and cleaned ALL the battery cables....including the ones to the relay box and waaa laaaa all fixed. It may sound goofy but if those connections aren't tight they cause a lot of problems and it's very easy to do. Good luck.
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Old 08-02-2010, 11:20 AM   #8
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could be a bad alternator that you bought too.....(just b/c its "new" doesn't mean its "good")
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Old 08-02-2010, 12:27 PM   #9
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Quote:
Originally Posted by mrcarcrazy View Post
could be a bad alternator that you bought too.....(just b/c its "new" doesn't mean its "good")
X2...most aren't new anyway, they are refurbs.
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Old 08-02-2010, 03:43 PM   #10
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As Bobthegod said its probably best to go through and recheck every connection and then the alternator because the gauge drop is a symptom of charging system failure so it should be some where in there.
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Old 08-04-2010, 11:32 AM   #11
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How would i go about cleaning the cables?
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Old 08-04-2010, 05:37 PM   #12
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Just remove them, clean them with a wire brush, do the inside and outside of the battery terminal and connectors with a cleaning brush (specifically made for cleaning terminals and cables, can be bought at any auto parts store under $10). Google "Clean battery cables" for easy instructions. You can even use a toothbrush and baking soda.

Then make sure you clean tighten the cables that go to the relay box. There is a small plastic cover that protects the bolt and cables. Make SURE IT"S TIGHT....this is the most common place for the problem.

After that then check and clean the starter end and ground end.

The start it up and check it out.....should be fixed.

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