Battery and Alternator

2000 CHEVROLET 3500
160,000 MILES • 5.7L • V8 • 2WD • MANUAL
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JUSTIN BLACKWELL
  • MEMBER
  • 1 POST
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??
Dec 26, 2019 at 7:29 PM
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ASEMASTER6371
  • ✓Experienced 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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Dec 26, 2019 at 10:52 PM
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