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Voltage regulator

Tiny
CHJ
  • MEMBER
  • 1996 NISSAN 200SX
  • 1.6L
  • 4 CYL
  • 2WD
  • 350,000 MILES
Put the new alternator (not a refurbished one) on this morning. Got my voltage tester on it. When car is running and I touch the posts on battery, it reads 12.7. Same as when it is not running. But when running and I touch the hot wire on back of alternator and the negative post on battery, it reads 14.7. And touching same when it is not running, it reads 12.7
Does this mean the voltage regulator is working?
Thanks
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Sunday, September 2nd, 2018 AT 9:44 AM

1 Reply

Tiny
AL514
  • MECHANIC
  • 4,793 POSTS
Hello, and thanks for using 2CarPros. Com. Yes, it sounds like your voltage regulator is working, you would have high or low voltage if it was not. You are going to have to check the main power wire going from the alternator to the battery, it sounds like you may have corroded wires and connections, especially with the mileages you have, these things will start to happen just because of age. Just try to trace the wire between the two and see if you can visually find the problem.
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Sunday, September 2nd, 2018 AT 10:08 AM

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