ECM fuse no power?

1991 CHEVROLET CAPRICE
190,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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OPERATOR707
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  • 1 POST
No power to ECM fuse.
Sep 21, 2018 at 11:37 PM
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JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
Hi and thanks for using 2CarPros.com.

Did you check the ECM/fuel pump in-line fuse? Take a look at the attached pictures and let me know if it helps. Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

Joe
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Sep 22, 2018 at 6:21 PM
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KASEKENNY
  • CAR REPAIR CONTRIBUTOR
  • 18,907 POSTS
Take a look at the wiring diagram below. This ECM/Fuel pump fuse is getting power directly from the battery junction block which is hot at all times. So if the fuse has no power then we need to perform a continuity check from the fuse to the battery junction block. More than likely you will just have to run a new wire to the fuse terminal and that will re-establish the power to the fuse.

https://www.2carpros.com/articles/how-to-check-wiring

Please see the diagram below. Let us know if you have other questions. Thanks
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Jul 5, 2021 at 7:00 PM