When you shut the car off something is staying on in the vehicle, causing a current draw on the battery, causing it to go dead over night. something that would cause this would be like a under the hood light, trunk light, interior light staying on. visually check it. and if you don't find anything you might want to buy a fluke/ volt meter, to check for unwanted current draw when the vehicle is off. your local mechanic could help. it could become more extensive then this but most likely not by the sounds of it.
Testimonial: "Thank you. I will try this out."
Either engine cooling fans stay running or blower motor stay running either one will run down battery.have dealership fix you could fault in the engine cooling fan control module or blower motor control module.
SOURCE: Car Battery draining over night
Something is shorted and it could be very difficult to find sometimes. It could be something as simple as a button being pressed when it shouldn't turning on a light or feature that runs all the time, but in a 2001 that is unlikely as it should turn off all lights after a certain period of time. It could be something in the radio. What I suggest is to pull one fuse at a time for accessories, check your manual for what each fuse powers. If the battery still drains with that fuse out then put it back in a pull another. When you find the fuse that allows your battery to keep it's charge then you will have a much smaller field of offending components.
For example, if you pull the fuse that powers the radio and heater, and the battery keeps it's charge then you know it is either the heater or radio causing your problem.
This can take a few weeks to do completly but won't cost you a penny to do.
SOURCE: electrical
If you have a volt meter check to see if there is a drain on the battery when the car is off, you can then pull each fuse to see which circuit is causing the draining. Sounds easy, but I have also seen cases where somone left change (a penny) in the cigarette lighter causing a short cirucit.
SOURCE: 1983 Oldsmobile Delta 88 Electrical problem. I AM STUMPED
It goes thru the dash circuits. Yes! add a wire from the alternator
output to the plus battery . The charge lite may be inoperative -
either on or off. You might want to put a fuse in that new line.
A cheap volt-ohm-meter would help you see if the alternator is charging
14-14.8 volt and the alterantor field is being energized.
SOURCE: car cutting off ,battery or the alternator
i work for advanced auto
the altiniator can bee goood but the voltige regulator is bad
SOURCE: I have a 1998 Isuzu Trooper. The battery keeps
Well, not necessarily a fuse, but a current draw. You need to find the draw.
Pull the fuse for the interior lights (so you can open doors and not alter your tests) and clock. Take off negative battery cable and put the volt meter or test light in series between batt terminal and cable. If the light lights or volts higer that a couple of volts, disconnect items one at a time and re test.
Start with the alternator, it is the most likely. It has a series of diodes that change current from alternating to DC, when one fails it leaks current. The unit may still charge, but not as well as with good diodes. The only test for diodes is a scope, or take it apart and test them individually. Use ohms and current flow in one direction, reverse test leads and no current. Failed diode will flow or connect in both directions.
Anyways, you will have an answer pretty quick if you test battery current draw and disconnect one system at a time and retest.
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My car would go dead after two days and the rear left door will be unlocked!!. I stopped locking the car and the battery stays good. So I guess there is a leak in the vacuum system of locks and the vacuum pump is constantly working. See if any of your car doors are unlocked after the battery is dead.
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