Question about 1994 Jeep Grand Cherokee

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Battery won't stay charged while running. Alternator is fine tho.

I have a '94 Grand Cherokee and it died while going down the road one day. I jumped it and got it home a short distance away. I put a volt meter on the battery while it was running and watched the voltage steadily drop until it died again at 6 volts. It took maybe 10 minutes. I had the alternator checked and they said it was fine. The battery is only two months old. The only advice so far is that my power distribution center is bad. I don't know exactly how to check or if that's my ghost. Any advice?

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  • yadayada
    yadayada May 11, 2010

    I have had batteries one month old fail (more than once) have the battery tested before u do anything else.

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Using the voltmeter check the voltage on the battery with the engine running, this will show you the charge it is recieving from the alternator. At 1500rpm it should be between 13.6volts-14.7volts. If not replace the battery and do it again if it is still the came then the problem lies with the alternator or the wiring between the battery and alternator. hope that helps.

Posted on May 21, 2009

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It seems that your battery is not getting its charging amount from the rectifier which comes from the dynamo when the engine is in running condition. So just your rectifier and check the output of the dynamo to be sure thats OK............sodeep

Posted on May 21, 2009

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