Question about Jeep Grand Cherokee

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My son's 96 grand cherokee kill's the battery when engine is shutoff and also when running the volt meter will be o.k. for a bit and then nose dive to 0 volts. had alt. checked o.k.. seemed to start acting up when it rains??

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Measure battery volts with a meter. It should be 12 or higher. Keep measuring when starting. It shouldn't drop below 10-11 volts roughly while starting ( or the battery is stuffed) while running you should have 13.5 or higher. If not, check and clean battery terminals and alternator charge cable connection on back of alternator (the big wire)
After all that, if it still does it (and your battery is good) it could be the alternator or engine computer

Posted on Aug 12, 2014

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Start the vehicle up and unhook the pos cable from the battery if it dies its going to be a bad alternator or the battery has gone bad.one sure way to know if its the alternator is to un hook the pos cable while the car is running.they can test good even when they arent.

Posted on Aug 18, 2008

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that dash meter is a volt meter.
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1 Answer

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