Question about 2000 Pontiac Grand Am GT

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2000 grand am se not charging, what could be the problem? changed battery and alternator, checked #49 fuse in the fuse block.

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Check the voltage at the alternator, then the wire going to the battery, you should be getting 14.4 volts or thereabout, inspect the grounda at the battery and frame and engine, then make sure the alternator is grounding on the engine

Posted on Jul 29, 2010


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First, it can damage your alternator to try to charge a dead battery by just driving or running the car. The alternator is designed to maintain the state of charge already in a battery.
Old (pre mid 60's cars with generators could do that).
Have your battery charged and tested. if it checks out, then have the charging system in the car tested. On most newer Jeeps, the regulator is not in the alternator it is part of the computer. If the alternator checks as good but it is not charging, that may be why.
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Who told you the alternator is O.K.? How much voltage is it producing? Take a volt meter , start car & make sure the alternator is charging properly. Attach meter to the posts & see what it reads. All readings over 13.2 to 14.5 O.k. less means new alternator. Also make sure battery cable connections are clean & tight.

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The alternator is not charging the battery. Could be alternator, voltage regulator (which is usually in the alternator) , dirty/loose connections. First I would inspect all relevant electrical connections, clean & tighten. If no change -- replace alternator.

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Alternator not exciting

Hi ' If you changed the battery and alternator,
Check the voltage at the red wire on the alternator. if there a less than 12 volt.
Check the fuse link, that goes in the starter positive bolt.
If the fuse is bad replace and recheck the charging system.
IF charging normal. good.
If not, che the fuse in the fuse box, "" cluster".
If the fuse is blow out, replace. and check again.

OK. I hope this work for you.

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