DIY...PART 2 wiring harness...1997 Chevy C3500 24 valve Cummins swap

[@JoseHernandez-xl2no]

Hello .. how is your progress on your truck

[@justincopeland7220]

I wanna do the same to mine flowing

[@wileycoyote7878]

Can you tell me what wires need constant power from the battery and what wires are key switch on for the PCM?

[@hervaciomata2861]

Give me til the weekend and I'll edit this comment. There is only 1 wire that requires 12v. I just want to make sure before I post