Battery and Alternator

Tiny
JUSTIN BLACKWELL
  • MEMBER
  • 2000 CHEVROLET 3500
  • 5.7L
  • V8
  • 2WD
  • MANUAL
  • 160,000 MILES
My truck will voltage will be around 9 and when I give it a little gas it will go below 8 an try to cut itself off. I have replaced the alternator, Battery, Starter, new battery side post end. The truck still seems like the alternator is not charging the battery to the required voltage. I have got 3 alternators swapped out because I was told it sounded like it just not charging. Any help or suggestions on what else it could be?
Friday, December 27th, 2019 AT 3:29 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning,

What is the battery voltage with the engine off?

Is the serpentine belt tight?

I attached a diagram for you. Verify battery voltage to the heavy red wire to the alternator.

Does the alternator light come on with the engine off? Check the fuse I circled for power on both sides.

Roy
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Friday, December 27th, 2019 AT 6:52 AM

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