Possible electrical short

Tiny
MHARTSE
  • MEMBER
  • 1995 CHEVROLET 2500
  • 200,000 MILES
My test light is very dim, when testing the fuse box AC spot, when the fuse is out. I do have the truck running and AC going full blast.
Friday, July 13th, 2018 AT 7:13 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,432 POSTS
This sounds like it can be one of two things, first I would check the alternator output.

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

If it checks out I would wiggle the positive battery cable (truck running) to see if the voltage comes back if so the positive battery cable needs to be replaced.

Please let us know what you find.

Cheers, Ken
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Saturday, July 14th, 2018 AT 6:02 PM

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