2 new alternators Still not charging - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 07-13-2012, 05:38 PM Thread Starter
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2 new alternators Still not charging

I have an 03 that isnt charging. I replaced the alternator with a new one twice today (napa) with the same result. I am positive its not the alternator although my local napa is a small one and doesnt have a way to test the alternator itself other than to swap it out with another.
I am hoping there is something thats common other than the alternator which you guys can direct me to Thanks
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post #2 of 16 Old 07-13-2012, 06:39 PM
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Sure the batteries are good?

Mark
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post #3 of 16 Old 07-13-2012, 07:29 PM Thread Starter
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Sure the batteries are good?

Yes i load tested them tonight.
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post #4 of 16 Old 07-13-2012, 07:50 PM
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How many amps does your tester draw? Many (most) home testers are not capable of fully testing the batteries (and they need to be tested individually as well). I have a tester too, but I realize that while it can be a positive indication of a bad battery, it is not necessarily a positive indication of a good one (hope that makes sense).

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Last edited by bismic; 07-14-2012 at 04:06 AM.
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post #5 of 16 Old 07-13-2012, 09:34 PM
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You need to test the electrolytes in your batteries with a refractometer. load testing a battery is only a partial test of a battery. ive seen this countless times while load testing a battery it shows up good but checking the battery fluids they show up bad.

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post #6 of 16 Old 07-13-2012, 09:43 PM
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And ive seen your exact symptoms with no charging issue. batterys load test good fluid tests bad install new batteries problems gone.

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post #7 of 16 Old 07-14-2012, 08:23 AM
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Inspect all the cables. Make sure there aren't any brakes or corrosion buildup but I too am going with bad batteries.

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post #8 of 16 Old 07-14-2012, 10:07 AM
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Any codes being thrown?
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post #9 of 16 Old 07-14-2012, 10:41 AM Thread Starter
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Any codes being thrown?

Nope no codes. I am going to head into the next town over and get both alternators i have and both batteries tested. Will let you guys know when i know.
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post #10 of 16 Old 07-14-2012, 10:49 AM
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I had the same issue with my alternator. Ended up being a bad battery warning light on the dash. Weird how a little light will keep your alternator from charging

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