ALTERNATOR/VOLTAGE REGULATOR

  • Tiny
  • Judi Todd
  • 1987 Chrysler 5th Avenue
  • V8
  • 2WD
  • automatic
  • 109,000 miles

Alternator on 1987 Chrysler 5th Ave is cranking out 20 volts and burned out battery. New battery installed and still alt. Cranking 20 volts. Does this car have a votage regulator that can be replaced? Or an EMC?

Friday, December 24th, 2010 AT 8:15 PM

8 Answers

  • Tiny
  • saturntech9
  • Expert
  • 28,417 posts

It's a external voltage regulator then can be replaced.I posted a diagram of where it is.

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Friday, December 24th, 2010 AT 8:48 PM
  • Tiny
  • Judi Todd
  • Member

Thank you very much for your quick answer. This is what I was hoping, as my son can replace it for me now. I sure appreciate your answer. Merry Christmas to you. Judi

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Saturday, December 25th, 2010 AT 4:10 AM
  • Tiny
  • Judi Todd
  • Member

Thank ou saturntech9. Your answer is very much appreciated. Merry Christmas. Judi

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Saturday, December 25th, 2010 AT 4:12 AM
  • Tiny
  • saturntech9
  • Expert
  • 28,417 posts

Your welcome hope you had a merry christmas.

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Sunday, December 26th, 2010 AT 4:37 PM
  • Tiny
  • Judi Todd
  • Member

My son wanted me to ask you also, if pretty much it sounds like it IS the voltage regulator that is causing the alternator to crank out 20 volts instead of 12 to 13? I mean, it seems like that would be the only thing that it could be. What is an (and I might get this wrong), EMI or EMC? Or if the car has an external VR, it doesn't have this other EMI or EMC? Thanks again for helping with this.

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Sunday, December 26th, 2010 AT 9:16 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,417 posts

You have a external voltage regulator I posted the wire diagram to show you that.I also posted how to test the voltage regulator to see if it's bad. You could have a bad voltage regulator but I would do the test I posted to make sure that's what the problem is.

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Monday, December 27th, 2010 AT 5:34 PM
  • Tiny
  • Judi Todd
  • Member

Thank you again for your help. I will forward this info to my son. Again, Happy Holidays! Judi

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Tuesday, December 28th, 2010 AT 12:00 AM
  • Tiny
  • saturntech9
  • Expert
  • 28,417 posts

Your welcome that's what were here for happy holidays to you too.'

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Tuesday, December 28th, 2010 AT 2:01 AM

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