How Does An Alt. Go Bad - Ford Powerstroke Diesel Forum
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Old 07-28-2006, 11:27 AM
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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
Aaron
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Old 07-28-2006, 11:38 AM
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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!
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Old 07-28-2006, 12:42 PM
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bad batts. will kill a good alternator.
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Old 07-28-2006, 04:24 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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Old 07-29-2006, 09:57 AM
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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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