ISX to X15 swap headache. PLEASE HELP

[Rawze]

(11-07-2023 )weissman379 Wrote:  It did have the red stop engine light, my mechanic friend cleared it but my batteries were low and didn't want to wait around. Some friend! I don't have insite right now my laptop isn't communicating with the truck. I tried to get a different USB adapter, but it was doing the same thing. I do get oil pressure about 10 psi while cranking, and I get fuel pressure when I crack the lines loose. I'm going to try to find somebody with insite to come over and help diagnose it, and go through the troubleshooting guide. I was just wondering if it wasn't starting because of the different file for that engine thanks again

whatever is the fault code for the red stop light is what you need to focus on.