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Battery drain from alternator by pgold
Started on: 02-16-2015 09:47 AM
Replies: 6 (211 views)
Last post by: Gall757 on 02-16-2015 09:55 PM
pgold
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Report this Post02-16-2015 09:47 AM Click Here to See the Profile for pgoldClick Here to Email pgoldSend a Private Message to pgoldEdit/Delete MessageReply w/QuoteDirect Link to This Post
I have been having this problem with my battery draining for some time.
I did manage to trace it back to the battery charge wire on the alternator.
I just replaced this alternator and it can't even have 20 miles on it.
Is there any parts inside that could be bad that would cause this battery drain?
If so can they be replaced without replacing the whole alternator?
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fierosound
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Report this Post02-16-2015 10:11 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
It's usually the diode trio or rectifier. There are rebuilt kits. (Rockauto has individual pieces too).
This is all you'd need provided there's nothing wrong with the stator or field windings.
http://delcoremy.com/Docume...ACEMENT-PARTS-1.aspx

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n7vrz
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Report this Post02-16-2015 10:55 AM Click Here to See the Profile for n7vrzClick Here to Email n7vrzSend a Private Message to n7vrzEdit/Delete MessageReply w/QuoteDirect Link to This Post
Only 20 miles on the alt???
Take it back to where you got it. Explain the problem and ask for a replacement. Don't forget the original purchase receipt.
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rogergarrison
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Report this Post02-16-2015 06:43 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post
I had an alternator go bad in the parking lot, killing the battery in a few minutes so bad it wouldn't recharge.
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85 SE VIN 9
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Report this Post02-16-2015 07:23 PM Click Here to See the Profile for 85 SE VIN 9Click Here to Email 85 SE VIN 9Send a Private Message to 85 SE VIN 9Edit/Delete MessageReply w/QuoteDirect Link to This Post
I have a new alternator that I haven't installed, but the instructions point out numerous times that if you have electrical problems they need to be fixed first, before installing the new alternator. Easier said than done no doubt, but worth considering. If you have the old alternator maybe you should have it tested.

It appears my car eats batteries. At higher speeds it overcharges. Otherwise it appears to work fine.

It sounds like you have a similar problem. How do you know it's the alternator draining the battery? It sounds like things aren't hooked up right. What about the electrical system is non-stock, damaged, or decayed? I went to Walmart to get a battery once. They insisted on doing a battery and charging system test first. It turned out both were fine. (This was on the other car). They didn't charge me anything for this. Maybe you should go just for the test to see what's actually happening.
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pgold
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Report this Post02-16-2015 09:11 PM Click Here to See the Profile for pgoldClick Here to Email pgoldSend a Private Message to pgoldEdit/Delete MessageReply w/QuoteDirect Link to This Post
I diagnosed the problem by connecting a test light between the negative battery terminal and negative post of the battery. when the light is connected the test light lights up showing that there is a ground somewhere in a circuit. I pulled the fuses one at a time to see what circuit the ground is in. Finally when i pulled the battery charge wire off the alternator the light went out. Pretty sure now that I'm getting a ground thru the alternator. A mechanic friend told me that my regulated was bad.
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Gall757
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Report this Post02-16-2015 09:55 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
It should test bad at the store where you bought it....and they should give you another one.
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