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Battery keeps Dying?

 
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Old 01-22-2009, 01:40 PM
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Battery keeps Dying?

I have a small problem that's been very persistent more now than ever, and its driving me crazy.

The battery in my car keeps dying, ive changed like 3 times already over a long period of time. But it only dies if i dont turn the car on for like 3 or 4 days, I dont use it every day, mostly only on the weekends.

I dont think its the alternator because if i jump start it, it charges the battery for the whole weekend per say. But if i don't turn it on for like 3 or 4 days, it wont start anymore so i have to jump start it again and i don't like doing that cause Ive heard i can ruin the computer...

Ive checked for leaks in the electrical system, found and fixed all we could find but it still happens.

The only thing that stays on is the little tiny blue LED light for the alarm, which always keep it in vale mode, but i really dont think its capable of draining my batery.

Any suggestions would be very helpful, thanks in advance.
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Old 01-22-2009, 02:58 PM
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Re: Battery keeps Dying?

how cold is it where you live? the cold weather does nasty stuff to batteries. it was 50 below here the other day. thats my guess.
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Old 01-22-2009, 04:13 PM
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Re: Battery keeps Dying?

i think you need a battery tender..
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Old 01-22-2009, 04:31 PM
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Re: Battery keeps Dying?

you should check for parasitic load... something is draining your battery most likely... remove the negative cable. then take a voltmeter and put it on the 20v setting. take one pointer of the meter and put it on the disconnected cable then take the other pointer and put it on the negative battery terminal... there shouldnt be more than about .2 volts showing up. if there is more than that that could be your problem
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Old 01-22-2009, 07:11 PM
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Re: Battery keeps Dying?

Quote:
Originally Posted by 94ludeguy View Post
you should check for parasitic load...

sounds simple enough, I'm going to give it a try...
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Old 01-22-2009, 07:13 PM
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Re: Battery keeps Dying?

have u checked ur alternator?? if the alternator isnt charging ur battery properly then it would go dead eventually
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Old 01-22-2009, 07:24 PM
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Re: Battery keeps Dying?

How fast is eventually? I'm guessing the alternator is still working because once I jump start it and take it for a spin, it charges the battery because i can see on the volt gauge, it measures about 12v average, and it lasts pretty much the whole day and the next with no problem. but if it goes about 2 or 3 whole days without turning it on, than it wont turn on...
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Old 01-22-2009, 09:19 PM
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Re: Battery keeps Dying?

Quote:
you should check for parasitic load...
Thats exactly what I was gonna say. Did you check it yet?
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Old 01-22-2009, 10:44 PM
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Re: Battery keeps Dying?

Quote:
Originally Posted by guti776 View Post
The battery in my car keeps dying, ive changed like 3 times already over a long period of time. But it only dies if i dont turn the car on for like 3 or 4 days, I dont use it every day, mostly only on the weekends.

I dont think its the alternator because if i jump start it, it charges the battery for the whole weekend per say. But if i don't turn it on for like 3 or 4 days, it wont start anymore so i have to jump start it again and i don't like doing that cause Ive heard i can ruin the computer...
from the 2nd thing you said that right there tells you its NOT the alternator. so you had that right. if the car is never turned on to charge the battery and its dying over time, that takes the alternator out of the equation. so its NOT the alternator. from the 1st thing you said, it sounds like you have a draw of some kind. the best way to narrow it down is to take the battery to autozone and have it tested. its quite possibly its got the beginings of a short. how old is the battery? over time the plates will corrode and deteriorate... its metal in an acidic solution... the corrosion brakes off and collects in the bottom and when pieces collect they can make a bridge that can connect a negative to a positive plate. that will short out a battery in no time. sometimes they will settle and brake the bridge... but then they build back up and create a new bridge. thats how you get intermittent problems. i had an ongoing problem like this for a month with my accord one time..

take your battery to autozone or something and get it tested. if its not the battery you have something drawing power.
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Old 01-23-2009, 12:41 AM
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Re: Battery keeps Dying?

Quote:
Originally Posted by 94ludeguy View Post
you should check for parasitic load... something is draining your battery most likely... remove the negative cable. then take a voltmeter and put it on the 20v setting. take one pointer of the meter and put it on the disconnected cable then take the other pointer and put it on the negative battery terminal... there shouldnt be more than about .2 volts showing up. if there is more than that that could be your problem
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Originally Posted by dbd6604 View Post
Thats exactly what I was gonna say. Did you check it yet?
yep, sounds like the trickle effect. I would guess the alarm. Even if you put it in valet mode and disconnect the LED, the unit itself is still monitoring it's sensors. You can get a small back-up battery for alarms for about $30 and maybe an extra $20 to have it installed. or DIY b/c it is a very simple install. Do you have anything plugged into a cigarette lighter or any other aftermarket electronics added?
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Old 01-23-2009, 04:06 PM
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Re: Battery keeps Dying?

The battery doesn't even have 3 months, like i said, its like the third battery in less that 3 years. I'm going to check for the parasitic load this weekend since a friend is going to let me borrow the voltmeter.

Ive always thought it could be the alarm but the thing is that Ive never wanted to disconnect it to see if its actually the one causing the problem... But its always been my primary subject. If in the end, its actually the alarm, im definitely getting that separate battery, didnt know you could do that.

I used to have a power plant with a sub woofer that was always in stand by, but i disconnected it long time ago, so i know its not that.
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Old 01-23-2009, 09:27 PM
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Re: Battery keeps Dying?

you can just pull the fuse to the alarm first as a test. It will be an in-line fuse on the heavy gauge red cable directly under the steering column. Depending on the alarm it could be a 15A fuse all the way up to a 30A. The red wire will be the one with constant power.
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Old 01-24-2009, 01:07 AM
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Re: Battery keeps Dying?

do you have the factory stereo or aftermarket?.most of the time its cause the stereo is installed incorrectly.
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Old 01-29-2009, 07:28 PM
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Re: Battery keeps Dying?

Ok, took a while but i was finally able to check for the parasitic load, there is definitely something draining the battery. I disconnected the fuses from the alarm and it there was still something else draining the battery.

I was going to go ahead and try disconnecting other stuff like the radio cause I'm guessing they connected it bad, or a few interior lights to see if one of those was the one draining the battery.

But thanks guys, this turned out to be very helpful!!! Thanks
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Old 01-29-2009, 10:56 PM
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Re: Battery keeps Dying?

Have you considered the fact that it may still be your alternator?

Have you had it load and RPM tested...with the regulator?

the reason I say this is, not only will a worn out alternator, that isn't properly charging your battery, (dipping under 11.5V @ load) cause a problem.. but MOST overlooked is an voltage regulator that is feeding it MORE than the maximum 14.5 Volts .

Hence the suggestion of a voltage test at high idle. You could be "burning" your batt prematurely.

your alternator is a complex, three phase AC current power "generator."

Read this: About Batteries and a very brief intro to alternators - about half way down the post.

*hint* diodes DO go bad.
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Old 05-31-2010, 10:08 PM
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Re: Battery keeps Dying?

did u ever figure out what the problem was?
i have the same symptoms
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Old 06-01-2010, 07:55 PM
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Re: Battery keeps Dying?

After a while with the problem, the car finally gave out, well sort of, it actually was the alternator dying, until it finally died and left me on the street. Turned out to be the alternator in my case. Replaced it and no more problem, for me, in this case. You were all right jeje
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