Question about 2000 GMC Savana

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Battery keeps draining down after sitting for a few hours

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It might be a shorted diode in your alternator.
when the engine is cold,
put a battery charger on the battery, set it to a low amp setting, like 10 amps.
leave it on for half an hour or so.
feel the alternator to see if it gets warm,
if it is warmer than the surrounding components, it might be drawing current from the battery.
at this point you might wanted to get it tested.

Posted on Aug 06, 2010

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SOURCE: my battery keeps getting drained

have the the battery checked to see if its good. Could be just a bad battery.. Also have the alternator checked.

Posted on Jul 15, 2009

  • 9 Answers

SOURCE: battery dies after sitting for a few hours.

disconnect battery put a test light between neg of battery and neg of cable if it lights u have a draw if so take out inter lamp fuse if still there put test light back on batt and cable and start removing fuses till lamp goes out then u know what cirit is drawing
common causes glove box lamp int lamp trunk lamp radio good luck

Posted on Nov 26, 2009

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You should check if alternator is fully charging up the battery after it has run, and then turned off. But if you don't have a voltmeter handy, try this: When you shut if off to sit overnight, take the negative battery terminal off the battery. When you get ready to start it, hook up the battery and see if battery is no longer weak. If battery is now good, you do have an unintended drain. If battery is weak again, check charging system, battery cables and connections, alternator connections-a loose connection will prevent battery from charging.
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