battery keeps draining???

Mustang5L5 said:

Get a DMM that measures AMPs in DC current. Disconnect one lead of the battery and wire it in series. Tell us how many amps you are drawing with the car shut down.


Once a battery is drained, it doesn't hold a charge as well and is easier to drain down. If you have to constantly jump a battery...it's junk and should be replaced. However, determine if you have a parasitic drain on your car first before buying a new one

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You can also check it with a test light if you don't have a DMM. hook it up the same way as 5l5 said. If the test light lights up. Start unhooking the Alt. and starter. If it is still on start pulling fuse's untill the light goes out. What ever you unhook or what ever fuse you pull and the light goes out, that will be your draw.

Also who tested the battery? Had the local part house test one for me before and it keep going dead even with the battery unhooked from the car. Ended up having a dead cell.

IF you got lights in you sunvisor theres the problem..They stay on and drain the battery down to nothing. Check them may be your problem. If it is dissconnect the wire

Swap out batteries if you have a second vehicle.

When my alternator went on my 89 it would die when it sits with the battery connected, it charged fine when the car was running. Replaced the alternator and viola, problem solved.

is your battery light on

I guarantee its your alternator. Sounds exactly like my cars problem at one time.

red93gthb said:

autozone tested the battery, guy actually tested it twice.

sunvisor lamps dont stay on. i doubt it would be those it just started happening two days ago and the battery drains with minutes

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The testers that autozone and advanceauto (where I had mine tested) will not find the dead cell in the battery. Find a shop that has a good snapon or other type of tester and have them check it.

You need a new altenator...When that light comes on ur altenator is junk.....WHen i bought my car 2 yrs ago my light was on also..wouldnt charge...sure enough dead altenator...u can get one at autozone for under 100 bux...will need to give them your old one for a core.

While the car is running pull the positive cable. If the car dies, the alternator is bad.

If you change the alternator, don't superman the bottom mounting bolt or you will snap the ear off of your alternator bracket.

solution: stop killing batt.

I heard the problem is that the exciter gets stuck on in the alternator which still draws power from the battery, which is why the battery drains when its left off and connected. I could be wrong, god forbid I post wrong information on this damn forum. Otherwise I'll get someone PMing me to tell me I'm a fool or idiotic..............you know who you are.