Alternator problems

[early 99 pwrstroke]

Well my alternator went out the other day again. This makes the 5th one I have put on the truck since I have had it . And I've had it for 5 years now. Do you think it is a grounding issue with the truck or is these trucks just prone to this problem? I thought about running a ground from the engine to the frame and one from the cab to the frame. What do y'all think?


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[Tj Krawler]

Originally Posted by early 99 pwrstroke

Well my alternator went out the other day again. This makes the 5th one I have put on the truck since I have had it . And I've had it for 5 years now. Do you think it is a grounding issue with the truck or is these trucks just prone to this problem? I thought about running a ground from the engine to the frame and one from the cab to the frame. What do y'all think?


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Where are you buying these alternators from? Rebuilt or new? Any extra electrical devices? (Stereo, lights...)

[early 99 pwrstroke]

They are new from Napa.

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[2000-7.3L]

Shoulda bought an alternator from me lol


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[Tj Krawler]

Originally Posted by early 99 pwrstroke

They are new from Napa.

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Really... I haven't heard too many problems with them. I know there has been some problems with the rebuilt units, but not the new ones. I put a new Napa one on my truck last December. Almost 4k on it, still holds ~14.5-14.7v at idle.

You could go with a high output alt, but the most I've seen is a 2 year warranty and I have heard quite a few cases of them not lasting. I believe the large case ones are better. I assume you at least have a lifetime warranty?

How old are your batteries? Bad batteries can eat an alternator... I've heard of a few people adding an extra ground from each battery to the frame.

Originally Posted by Autofair Diesel parts

Shoulda bought an alternator from me lol


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I wanted to go OEM... My dealer quoted me almost 3x the price as one with a lifetime warranty. To be fair though, the OEM one did last 12 years and almost 100k miles. Of course I'm sure your prices are better than that!

[2000-7.3L]

Originally Posted by Tj Krawler

Really... I haven't heard too many problems with them. I know there has been some problems with the rebuilt units, but not the new ones. I put a new Napa one on my truck last December. Almost 4k on it, still holds ~14.5-14.7v at idle.

You could go with a high output alt, but the most I've seen is a 2 year warranty and I have heard quite a few cases of them not lasting. I believe the large case ones are better. I assume you at least have a lifetime warranty?

How old are your batteries? Bad batteries can eat an alternator... I've heard of a few people adding an extra ground from each battery to the frame.






I wanted to go OEM... My dealer quoted me almost 3x the price as one with a lifetime warranty. To be fair though, the OEM one did last 12 years and almost 100k miles. Of course I'm sure your prices are better than that!

My prices are better than ur dealer! I have the beat prices on here!


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[early 99 pwrstroke]

The batteries are about 2 years old and they check out good . I don't have anything extra drawing any power either. At idle the new one is putting out 14.3 volts. I just thought maybe the grounds would help .