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Apr 2, 2014 | 06:35 PM

Mezman

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Trailering

Joined: Jan 2012

Posts: 21

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Electrical

85 - 6.9 F250. 4x4. Alternator went out so I bought a new one now its over charging. Probably what caused the old one to burn out, any ideas?

Apr 2, 2014 | 08:14 PM

Macrobb

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Joined: Dec 2011

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Quote:

Originally Posted by Mezman

85 - 6.9 F250. 4x4. Alternator went out so I bought a new one now its over charging. Probably what caused the old one to burn out, any ideas?

First, overcharging? What voltage?

Second, these alternators have an external regulator. It's about a 3" square box, 1" tall with a 4-wire connector coming out of it on the passenger side inside fender.
Either it's failing, or you've got grounding issues.

Whether you replace it or not, I suggest running a nice ground lead from the engine block to the casing of that regulator(or whatever it's bolted to).

Apr 4, 2014 | 08:27 AM

Perk85F250

Senior User

Joined: Jun 2013

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An over charging alternator can cause the acid level to drop in your batteries. You may want to check the fluid level just to be safe. I hope they didn't get fried by your old alternator...

Apr 4, 2014 | 10:21 PM

genscripter

Cargo Master

Joined: Oct 2012

Posts: 3,072

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From: California

Mezman, you need to be a bit more descriptive, both in your titles and the content of your threads.

Seriously.... "electrical" ?

also, what's your vehicle? what year? I'd love to tell you what I think your problem is (the VR), but if you have a newer IDI, then you probalby have an internal regulator.