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Battery is Dead, Overcharging?

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xxShaneOmac

15+ Year Contributor
423
0
Jan 2, 2007
Everett, Washington
I replaced my alternator 6months ago when I got the dash lights come up on me.

3 Months later my car keep dieing after a weekend of not running. Then on really cold nights it would be dead the next morning.

After a While I started to see excessive corrosive build ups around the metal tie down the holds the battery. It got really bad and my car would not hold a charge.

I replaced the battery and my car was great for 2 weeks. This weekend I did not drive it and it was dead this morning.

I checked and the brand new battery was covered in white corrosive residue.


Is this a sign of overcharging?
 
I don't think that would be a sign of overcharging. I may be wrong though. When you replaced the battery did you clean up the battery terminals and tie downs? Some of the corrosion could be taking a charge from the battery draining it.
 
What you can also do iff you have access to a volt meter... is get the car started, and see what volts the battery i reading. It can give you a general idea of what the alternator is or isn't doing. But definitely clean the terminals up first.
 
Hot water is the best. Makes your battery terminals look brand new. That's right HOT WATER. Not necessarily a sign of overcharging,all battery's do this after some time.
You need a volt meter to check the alternator. Engine running all loads off charging voltage should be from 13.5 - 14.5V anything more than 15v is overcharging. With all loads on it should be about the same if not just a little lower than with the loads off. Make sure you battery terminals are CLEAN AND TIGHT. Make sure you can't wiggle them loose and there seated all the way down on the battery.
 
This is not normal.

1. The terminals look 100% fine, there is nothing on them.
2. The battery is brand new and is dead in less then 2 weeks use. After not driving it for a weekend it dies, same symptions of my old battery.
3. There is white corrosion covering the entire top of the battery, this is not normal after a week.
 
This is not normal.

1. The terminals look 100% fine, there is nothing on them.
2. The battery is brand new and is dead in less then 2 weeks use. After not driving it for a weekend it dies, same symptions of my old battery.
3. There is white corrosion covering the entire top of the battery, this is not normal after a week.

Did you check the voltages as I advised? If not I can't help you.
 
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