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Chevrolet
2500
Electrical
Fuse Panel
Possible electrical short
1995 CHEVROLET 2500
200,000 MILES
MHARTSE
MEMBER
1 POST
FOLLOW
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.
Jul 13, 2018 at 7:13 AM
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STRAILER
CERTIFIED EXPERT
53,854 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
Jul 14, 2018 at 6:02 PM