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No set thing.. Take it to a garage. The alternator may be faulty: only voltage of 13 or 13.5 (which is listed as acceptable but is not sufficient to start the battery as well as run headlights etc.), rather than 14 or greater (as is needed for this particular make and model). Another thing you should check is grounding. Be sure connections & ground straps are good. Be sure you have good battery cables & connections.

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โˆ™ 2008-11-18 23:37:35
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Q: What could make a 92 Grand Prix lose power and damage the alternator or the battery repeatedly?
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1999 grand am se Check the altinator to see if it's charging the battery?

First start the car then pull off the positive on the battery if the car dies than you need a new alternator if the car keeps running u may need a new battery. A word of caution, testing an alternator that way can cause damage to the alternator. The alternator needs power to make power unlike the old generators from the past.


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What would make a 1999 Jeep Grand Cherokee lose power when driven and won't start when it sits there it will start and will run then lose power again?

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