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.
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Tuesday, December 15th, 2020 AT 5:27 AM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
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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