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2000 impala 3800engine when sits battery drains

Has new battery alt. charging

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If the battery goes dead in a few days, something is "on" and draining it.
Someone will need to check the circuits to find the drain. You can pull all of the fuses or check each circuit one at a time with a test light.

Posted on Dec 09, 2012


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Posted on Jan 02, 2017

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SOURCE: Battery dies after car is sitting for 2 days. Alt

I assume you have replaced the battery? If not have it tested.

Check to see if a glove box light, trunk light or under hood light is staying on. Also you can remove the negative battery cable and then reinstall it. When reinstalling it, if you see a spark (other than just a very small one) there is a current draw on the battery. This current draw can be isolated by pulling one fuse at a time to see when the battery stops sparking on reconnect. It is possible you could have a shorted voltage regulator causing the current draw also. Many things can cause this problem.

Posted on Sep 24, 2009

  • 2 Answers

SOURCE: battery drains quickly

the starter could be draining it

Posted on Feb 28, 2009

  • 2 Answers

SOURCE: I have a 2000 chevy metro 4 cyl 1.3 the vehicle

thats a good question. very hard problem to fix. i had a 2005 colorado i went through 4 batteries in 3 years. chevy could not find problem. they said i had a drain. never did find it sold vechicle.

Posted on Feb 25, 2009

  • 115 Answers

SOURCE: 2000 caravan not charging. R&R alt, and batt.

Have the computer checked. On your vehicle the computer is what tells the alternator to turn on to start charging. If the alterantaor is not getting that signal from the computer you will have to replace the computer.

Posted on Dec 17, 2009

  • 66 Answers

SOURCE: Have a short or something draining battery.

Get a multimeter then disconnect the positive side of the battery. Measure the amp(current) between the terminal you just disconnected and the positive battery while the car is off. and have someone get a tweezer and pull out one at a time each fuse in the fuse box. When the amp goes down on the multimeter then you found out where in your car there is a short. Note the fuse you pulled out in your car manual. It could be radio shorting, domelight shorting. Sometimes kids drop pennys or coins in the radio disk slots shorting the radio or amplifier in the car is always on.

Posted on Mar 27, 2010

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Have the battery load tested to determine it's ability to take & hold a charge. It could have a bad cell that will drain the good cells. Your local auto parts will test the battery free of charge.
I hope this helps.

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you should remove your alternator and take it into an auto parts store and they can test it for you.
this alt had an internal regulator which can be replaced easy.
your auto parts store will be able to full feld your alt to bypass the regulator. this is how you test it to see if the regulator is bad.

you didnt say how many miles are on this truck .
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on the back side of the alt you will see the replaceable regulator.

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