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I had some questions on why my truck wont charge i replaced pcm cause i heard they are famaous for the external voltage regulator problems and its still not charging it threw a crankshaft code and im not sure if that would mess with the ... JOIN NOW TO REMOVE TRACER

truck not charging when on

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  #1  
Old 11-12-2012, 12:34 PM
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Default truck not charging when on

I had some questions on why my truck wont charge i replaced pcm cause i heard they are famaous for the external voltage regulator problems and its still not charging it threw a crankshaft code and im not sure if that would mess with the charging please help!!!!!!
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Old 11-12-2012, 01:24 PM
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Have you put a multi-meter on the battery when running to check voltage? Or are you just looking at the guage?
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Old 11-12-2012, 03:00 PM
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Its reading 11.3 when running but the gauge in the cluster has no volts
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Old 11-12-2012, 03:38 PM
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Since you have already thrown a PCM at I would imagine we can eliminate it, I would have been more inclined to put an alternator on it, that would be my suggestion. Worst case scenario take it to one of the auto parts stores that test them and have it tested before you buy a new one.
Good Luck!
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Old 11-12-2012, 03:54 PM
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Could also be your external voltage regulator.......

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Old 11-12-2012, 04:13 PM
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Voltage regulator is built into the PCM as far as I know. In any event test the alternator as starting point.
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Old 11-12-2012, 05:05 PM
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I have a new alt in it and had it checked and the voltage regulator is in the pcm and i just changed the crankshaft positioning sensor but ive heard about people eliminating the voltage problem by puting a ford external voltage regulator i just dont know what i need or how to do that so i tryed everything else i could think of
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Old 11-12-2012, 06:11 PM
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Originally Posted by talan707 View Post
I have a new alt in it and had it checked and the voltage regulator is in the pcm and i just changed the crankshaft positioning sensor but ive heard about people eliminating the voltage problem by puting a ford external voltage regulator i just dont know what i need or how to do that so i tryed everything else i could think of
Okay you didn't mention the alternator before. Is the PCM remanufactured or junk yard?

Last edited by bg71361; 11-12-2012 at 06:25 PM.
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Old 11-12-2012, 07:39 PM
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The pcm is a reman
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