Overcharging

Tiny
LARRY LAFRANK
  • MEMBER
  • 1989 GMC C2500
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I've replaced the alternator, battery and ECM. It's still overcharging.
Tuesday, December 15th, 2020 AT 5:27 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

What is the charge rate?

There is no ECM involvement in this year. It is way too early.

It is all controlled by the alternator itself.

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

https://www.2carpros.com/articles/how-to-replace-an-alternator

Roy

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Tuesday, December 15th, 2020 AT 6:50 AM

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