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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

battery not charging

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Old Jul 26, 2014 | 03:13 PM
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battery not charging

Can help me? My battery isn't being charged by the alternator. Its a new alternator and the battery is still good. When i pop the negative off the battery the engine cuts right out. any suggestions?
 
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Old Jul 26, 2014 | 03:29 PM
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Take it back

I would take the alternator back. Sounds bad. We all get new parts that are bad from time to time. Sucks, but it happens.
 
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Old Jul 26, 2014 | 03:44 PM
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I did that already and I'm still having the same problem
 
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Old Jul 26, 2014 | 04:19 PM
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"Not charging" - it's worse than that - check for good ground(s) and proper connections... your alternator ain't alternatin'. At all.

Can almost believe two bad alternators in a row these days, but that's probably not the way to bet (hopefully) yet? Have you done anything else to the truck recently?

Truck is running exclusively off battery instead of the charging system for whatever reason. That's why it dies when you remove cable. Remember the battery has only one purpose (basically...) and that's to start the engine. After that the alternator runs everything. Btw this condition will frag your battery right quick, it's important to get it on an outboard charger till you get things sorted out.
 
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Old Jul 26, 2014 | 06:56 PM
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I haven't had the truck long so this is the first thing I've done to it
 
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Old Jul 26, 2014 | 09:03 PM
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Check your voltage regulator. unless you have done the 3G upgrade it will be located on the front crossmember between the radiator and the battery. They are external on these trucks
 
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Old Jul 27, 2014 | 02:42 PM
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Replaced volt reg when I put the new alt in.
 
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Old Jul 27, 2014 | 03:20 PM
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check with a meter and make sure everything is doing what it is supposed to. The cheap china regulators are very hit or miss on if they will work out of the box. Track the power. find out where it stops and then determine why it stopped.
 
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Old Jul 27, 2014 | 03:27 PM
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When all else fails, return alternator and regulator and pull a 3G from the junkyard. One of the best mods you can do to these trucks. (Or any old ford)
 
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Old Jul 27, 2014 | 08:49 PM
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figured it out

after some research and wire chasing I found out the wire that runs from the ignition to the voltage regulator had been cut by the previous owner and after reattaching it my issue has been resolved
 
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Old Jul 27, 2014 | 09:03 PM
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Ya gotta ask yourself why they would have snipped such an important wire.
 
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Old Jul 27, 2014 | 10:25 PM
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That'd do it.

Sent from my iPhone using IB AutoGroup
 
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Old Jul 27, 2014 | 10:42 PM
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Originally Posted by Tman_417
Can help me? My battery isn't being charged by the alternator. Its a new alternator and the battery is still good. When i pop the negative off the battery the engine cuts right out. any suggestions?
Taking the battery cables off a running vehicle as it sits *might* be the same as doing the old hillbilly *generator* test, which can blow out the diodes in your alternator. So, I'd think twice about doing it.

Orich
 
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