1991 7.3 IDI
Can someone give me wiring schematics to the glow plug controller?
I found a couple dead wires on the glow plug switch and I'm thinking that's the problem. They haven't worked since I got the truck. The guy who had it before me absolutely destroyed the wiring and my engine bay looks like a spaghetti bowl.

 

 

Thanks a lot man I've been dyin to get the GPs on the truck working since ive had it

 

What are the glowplugs doing? Do they energize with key-on? Have you swapped the glow plug controller? 8/10 times that's what it is with these trucks

 

no. no power gets to the controller when i turn the key on. like i said the wiring is like a spaghetti bowl.

 

Best of luck