Posting for my buddy has a 95 f350 with a 7.3. He took it to a shop for front end work and when he went to pick it up they told him they couldn't get it to start from the key, but they could get it to start and run by jumping the starter relay. He replaced the neutral safety switch and ignition switch. Don't have wiring diagram of the start circuit but by just visually tracing what can see cant find a break etc. is there a fuse link inline somewhere or something else to check? Or maybe someone out there has a wiring diagram?? Any help appreciated

 

Diagnosis is a very important part to fixing something.

Are you getting power to the trigger wire on the solenoid?