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Possible voltage regulator issue

Tiny
MATTNITZ1280
  • MEMBER
  • 1995 PLYMOUTH VOYAGER
  • 3.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 176,000 MILES
So I have a new alternator and battery. When hooked to a computer it is saying voltage regulator. But in one of your answers on this site you said the computer is very reliable and it should be the last thing to replace. So what should I do? Is there a fuse that may be bad? Is there something else that could be wrong to give it that reading of "bad voltage regulator"? The computer is $200.00 or more to replace. So hoping there is another way to fix the voltage regulator without installing a brand new computer all together. Please help!
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Monday, April 20th, 2020 AT 9:49 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
I need you to check something for me. I want to confirm the alternator isn't actually charging the battery. Here is a simple test to help with testing. All that will be needed is a volt meter or a multi meter. Follow this link:

https://www.2carpros.com/articles/how-to-check-a-car-alternator

https://www.2carpros.com/articles/how-to-use-a-voltmeter

________________________________________

Do that and let me know what voltages are found. I will tell you that the regulator is integral in the PCM, so it isn't serviceable. Let me know what you find.

Joe
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Monday, April 20th, 2020 AT 10:02 PM

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