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175a fuse was blown, no crank no start and my gauges do not Move?

Tiny
DYLMAN66
  • MEMBER
  • 2007 CHEVROLET SILVERADO
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
I woke up a week or so ago and my truck was completely dead. No dome lights, nothing in the dash with key on. Brought my meter out and found out my 175a fuse was blown. Replaced that and the drained battery. Now I have lights on my instrument cluster and center console, but no crank no start and my gauges don't move. I've seen people talk about replacing the fuse box, so I also replaced that in hopes it would fix something, but it didn't. Please help me find this issue.
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Wednesday, August 31st, 2022 AT 12:03 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,070 POSTS
The fact that the battery was drained kind of tells me the alternator may not be working or is shorted internally which will blow the 175-amp fuse, once you replaced the fuse is it okay or does it blow again? If so, disconnect the wiring from the alternator, disconnect the battery first. Also, check the IPC fuse # 48 or # 46 which powers the instrument cluster.

For the no crank no run problem there is a run/crank relay that we need to check or replace.

Here is a guide to help you test it and the relay locations well in the images below:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what happens.
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Wednesday, August 31st, 2022 AT 10:15 AM

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