No electrical power to fuel pump starter or gauges

Tiny
SMILLS98823
  • MEMBER
  • 1997 GMC C3500
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
I came home one day turned off my truck went inside to do something came back out tried to start it and I have no power to the starter the fuel pump or my gauges. The radio has power the courtesy lights have power. I have checked all grounds and positive cables. I have checked all fuses and relays. What am I missing?
Sunday, August 12th, 2018 AT 1:50 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,621 POSTS
Hello,

It sounds like the ignition switch is not working right. To confirm the issue here is a guide to help you check for power and the wiring diagrams to help you see which wires to test:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please let us know what you find.

Cheers, Ken
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Tuesday, August 14th, 2018 AT 11:30 AM

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