Question about 2002 Pontiac Grand Am

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Car draining the battery , alternator is new, car starts fine but the battery light is on, battery is new also, don't even know... please help pontiac grand am 1996 v6... there is a broken wire , but both ends are tight together ...

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It looks like the wiring needs to be checked, you mentioned a wire that is reconnected, maybe it is damaged in another place, the light comes only if the alternator does not work or is not properly wired.

Posted on Aug 20, 2010

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BATTERY DRAIN ON KIA SPORTAGE 99


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Battery light comes on even though battery has been replaced


Take the car to your electrician to check whether the alternator is charging,or not. Because from your saying looks like the alternator is not charging and if this is the fault,is going to drain your new battery.

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I can't imagine how changing the belt would have any effect on the electrical system if the alternator is working.
The way you check for a drain is to disconnect the battery ground cable and use a test light to make the connection between the battery and ground. If there is something drawing power from the battery the light will glow.
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1 Answer

New battry keeps running down


If your battery runs down when the car is off and not running, then you probably have a 12volt drain
killiongthe battery. If your problem occurs even when the car is being driven and used, then your alternator may be the culprit, it may not be charging enough. Attach a voltmeter across the + and - battery terminals. Start the car and let it idle without any accessories on. If you get a reading somewhere between 13.75 - 14.75 volts, your alternator is ok.
To check for a 12volt drain, disconnect the negative battery terminal and slowly scrape it on
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3 Answers

Picture of battery lights up on dash panel, car starts and runs, coolants/fluids are fine


Your alternator is likely bad. Start the car, disconnect the battery, if it stops you need a new one - or head down to the parts store to ask them to test it on the car for you.

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1 Answer

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you not only should be getting tired of jump starting your car, you battery is also .. modern batteries can only be deep discharged a few times .. so each time you allow it to do that you have removed a significant portion of the batteries life ... usually the problem is caused by a light not turning off ... like the trunk or under hood light .. even the glove box light .. in your case of overnight discharge i would guess that something is drawing about 7 amps .. thats more than most lamps .. now since you have had trouble with your rear defroster i am suspecting that it is staying on .. there is a relay that controls that .. that relay may be stuck on .. feel the defrost element to see if its warm . you can disconnect that defroster or pull its fuse to test that theory .. also you can remove bulbs to see if thats the problem .. once in a while yoiu see a shorted diode in t he alternator (even new ones) .. that should have been tested when they installed or tested the alternator .. since the current is so high then whatever is drawing that much will be warm to the touch .. until you find the problem, you have little choice but to disconnect the battery each night or hook up a charger .. one way to trouble shoot if you dont have equipment is to do the following:
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3. if somethng is drawing lots of current then the bulb will glow brightly .. disconnect things one at a time until the bulb dims.

many auto parts stores have test equipment that can test for leakage .. they wont have time to troubleshoot but they can tell how much leakage there is ... that service is often free ..

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first off never never never trust a tow truck driver they are idiots, it takes a BMW 15 mins to go into a sleep mode before a draw can be mesured, as for the dealership they should have caught that using the Midtronics batt/alt tester that is standard from BMW 2.5 years for a batt replacement is reasonable especially in a BMW based on the high demand on the electrical system, I just replaced an alt on an M54 enginge just today so they do go bad, have them give you a print out from the midtronics with your VIN on the printout showing your alt is bad and what the batt is.

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