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12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

voltage regulator

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Old Jul 10, 2010 | 10:43 PM
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Default voltage regulator
is the voltage regulator in the alternator or in the computer?
 
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Old Jul 10, 2010 | 11:47 PM
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Its in the PCM but you can wire in an external voltage regulator.

What kind of problems are you having?
 
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Old Jul 11, 2010 | 06:30 PM
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the gen light is on when im idling it maxes out on the guage but when under a load it goes into the normal range and turns the gen light off im not sure whats going on
 
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Old Jul 13, 2010 | 04:57 PM
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bump please help guys
 
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Old Jul 13, 2010 | 07:54 PM
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We need voltage numbers from the battery terminals.
 
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Old Jul 13, 2010 | 08:52 PM
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okay i tested the alternator and its putting out 14.61 volts could bad batterys cause this condition?
 
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Old Jul 15, 2010 | 05:46 PM
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okay so idle i am getting 14.1 volts and 2500rpm im getting 16.30 and bench tested alternator it is good on the tester
 
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Old Jul 15, 2010 | 06:47 PM
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The alternator and voltage regulator should be good then.

Weird. Check all your body/frame grounds. Clean all the mounting points. I think there are 7 or 8.
 
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Old Jul 15, 2010 | 06:54 PM
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okay ill look for one i might have broken one when replacing the drivers side fender
dang
 
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Old Jul 22, 2010 | 07:04 PM
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my pcm went out and i did the external voltage regulator, mine does the exact same thing.
 
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