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1997 GMC SIERRA
250,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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JOHN LORCH
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  • 3 POSTS
There are two ignition fuses feed wires (brown), and one ignition feed (pink) that are not connected. From the firewall block in the engine bay, where do they assign to?
Jul 21, 2019 at 12:11 PM
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SCGRANTURISMO
  • CERTIFIED EXPERT
  • 4,897 POSTS
Hello,

The two wires are going to the Underhood Fuse/Relay Center(Pink) and I/P Fuse Block(Brown). I have included the Starting Circuit and Power Distribution Wiring Diagrams in the diagrams down below with all the pertinent wires highlighted for you. Please use these guides and get back to us with how everything turns out.

Thanks,
Alex
2CarPros
Jul 21, 2019 at 6:40 PM
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JOHN LORCH
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  • 3 POSTS
I dont know if I can't see it, but what I'm looking for is I have a pink wire from my connection block that attached at the firewall, on the engine bay side. The wire is pin as ignition-off, run, crank. And I dont know where that is suppose to be ran to.
Jul 21, 2019 at 6:57 PM
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JOHN LORCH
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  • 3 POSTS
Other thing, I'm not seeing or finding a crank fuse, and curious to where the location of 'circuit 1020".
Thank you
Jul 21, 2019 at 7:42 PM
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SCGRANTURISMO
  • CERTIFIED EXPERT
  • 4,897 POSTS
Hello again,

Okay, here it is again. As before, I have the two wires HIGHLIGHTED for you. If you look at the wiring diagram, the two big dashed boxes are the ignition switch, and the I/P fuse box. these are the wires you ask for. Here again, is the wiring diagram for the starting circuit. If you start at the battery and follow the HIGHLIGHTED wires you will see that the electrical path goes through Maxi Fuse 6(40A) of the Underhood Fuse Relay Box and Crank Fuse 8(10A) of the I/P fuse box. I have also included the diagrams and callouts for the fuse boxes in the diagrams down below as well. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
Jul 22, 2019 at 12:32 AM