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Electrical night mare! Help Alternator!!

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Old Jan 12, 2012 | 05:34 PM
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Electrical night mare! Help Alternator!!

2004 excursion 6l power stroke. Had 4 alternators install over the last 4 years.2 just last year.truck will not start after stitting over night,jump it checked alt output was only 12,4 v, should be 14 plus.Check after 3 mins of running and bam 14.4 v? Return truck to shop where the alternators were under warrenty, they check both alt, and batteries and said everything is good.Seems like this comes and goes.If anyone has a problem like this pls let me know what you have found to solve it tx
 
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Old Jan 12, 2012 | 06:35 PM
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Sounds like you have a parasitic drain. Forget how you do the test but I'm sure someone will chime in.
 
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Old Jan 12, 2012 | 08:40 PM
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I have also had 4 alternators in as many years. One day it's fine, next poof. I have no idea what's causing it.
 
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Old Jan 12, 2012 | 08:41 PM
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Also, after a full battery charge, it's fine for a few weeks, then bam, again. It's really annoying. I've also noticed this time it happens after a super cold night.
 
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Old Jan 12, 2012 | 09:39 PM
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Bingo Jay its fine for a few weeks and now its cold and dead.No idea whats is cause it ?
 
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Old Jan 13, 2012 | 03:53 AM
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What alternators are you using? Oem or aftermarket. I will tell you that oriellys alternators only last about 4 months then poof! There out.
 
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Old Jan 13, 2012 | 04:13 AM
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I have used rebuilds from 3 different shops.
 
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Old Jan 13, 2012 | 05:18 AM
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I wonder if their using USA parts or import.

Ive had the same problem ever since my oem alternator went out on my 7.3 ex. Bought a top of the line alternator from oriellys and had problems ever since. Was going to buy a new oem from ford but got a 6.0 alternator off fte that I'm going to try.
 
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Old Jan 14, 2012 | 01:41 PM
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The garge said everything was fine again!!.told them to keep it over night and chesk alt. when they frist fired it up in morn. Got a call at 8;30 am,they found the diode was faulted in the alt!! replaced once again. The replacment is made by AC Delco.Hope this last until i sell the truck this summer tx
 
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