How Does An Alt. Go Bad - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 07-28-2006, 12:27 PM Thread Starter
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How Does An Alt. Go Bad

Last week i put a 6 pos. chip in and ran w/ it a couple days then i went on vacation, well today i got back and went to drive my truck and the batt. light is on. I replaced my alt. about 2k miles ago and it fixed it. My alt. can't be bad already can it
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post #2 of 5 Old 07-28-2006, 12:38 PM
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Have your batteries tested. If you have one bad one and one good one, your alternator will work overtime trying to keep up and burn out your voltage regulator.
I found this out the hard way and had to replace my batteries and alt.
Test your Batteries and if ones bad, replace both!

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel




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post #3 of 5 Old 07-28-2006, 01:42 PM
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bad batts. will kill a good alternator.

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05 f350 crew, longbed, 4x4, 68k, lariat
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post #4 of 5 Old 07-28-2006, 05:24 PM
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High resistance in the wiring will also. The big cables that run to the starter, batteries, and altenator should have ZERO resistance. If a cable that big has any resistance at all, its just a big energy sucker......test the batteris and check the cables VERY well......
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post #5 of 5 Old 07-29-2006, 10:57 AM Thread Starter
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After i made this post i went out and drove some more and the light didn't come on again but today i drove it and it came on for about 10 sec. then it went off. It sounds to me like a conection so i'll check that sometime. Any other sugestions?
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