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Old 02-14-2009, 01:38 PM   #1
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Flaky Voltmeter in Dash

I have a 1997 Wrangler. The battery voltmeter in the dash is flaky. When I start the Jeep it displays 14 V. After about 5 minutes of driving the needle quickly nosedives and points to 9 V. It has done this 3 or 4 times in the past week.

With the needle pointing to 9 V and the engine still running, I measured the voltage at the battery posts using a digital voltmeter - it was 14 V, which meant the alternator was charging the batteries (thank goodness).

So what would make the battery voltmeter in the dash do this? A bad connection somewhere?

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Old 02-14-2009, 01:42 PM   #2
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Or possibly a short in the wiring somewhere.

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Old 02-14-2009, 01:44 PM   #3
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Bad ground perhaps?
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Old 02-24-2009, 01:01 PM   #4
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Quote:
Originally Posted by Ohio Patriot View Post
I have a 1997 Wrangler. The battery voltmeter in the dash is flaky. When I start the Jeep it displays 14 V. After about 5 minutes of driving the needle quickly nosedives and points to 9 V. It has done this 3 or 4 times in the past week.

With the needle pointing to 9 V and the engine still running, I measured the voltage at the battery posts using a digital voltmeter - it was 14 V, which meant the alternator was charging the batteries (thank goodness).

So what would make the battery voltmeter in the dash do this? A bad connection somewhere?
I have been having the same problems except my voltmeter just totally dies. I did replace the battery but I am still having the same problems, I am thinking about replacing the Alternator, did you ever figure out your problem?
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Old 02-24-2009, 01:23 PM   #5
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The first thing I do when there's an intermittent electrical problem like that is to remove both of the battery connections, clean the battery posts and inside of the connectors (use a wire brush), then securely reattach them. If you can't get them tight enough, which is common, look at the connector where you'll see two edges that come together that prevent it from getting any tighter. Use a Dremel blade or saw to remove a small amount of material (lead) on both sides so the clamp can be made to close around a smaller diameter so it can once again fit tightely enough around the battery post.
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