are you sure you unpluged the fuel heater or did you unplug that other plug right by it??...had a guy do that very thing the other day, thought he had unplugged the heater but didnt....if i remember right its a white plug pretty good size plug....i still think its the fuel heater....its on the same fuse with the PCM which keeps it from starting if the fuse is blown

 

the fuel bowl heater would be pretty much the only thing to blow the fuse.. I just snipped my wire going to the heater, the wire was damaged bad anyways, and I actually just bought a new harness.

 

I also need the fuse box assignments both under the dash board and under the hood. Again my truck is a 1999 F-350 single axle 4X4 7.3 DIT Thank you all, your advice has enlightned me greatly!

 

so did you get it fixed?

 

I got the fuse box assignments yesterday and watched football the rest of the day. Ihave other work tday and tomorrow but should be back on my 350 tuesday i will let you know how it works out. thanks

 

If you look in the tech section I have a link to on line owners manuals, you can print them for future use...

 

I just want to thank everyone for their help and advice. My problem is resolved It was a bad golw plug on the right bank. thanks again ps I have already downloaded the manuels as suggested.

 

Bad glow plug was causing the PCM fuse to blow? Thats a first for me???

 

 

The fuse that kept failing at key on was the 30 amp fuse located under the dash. Since replacing glow plug relay, fuel heater and now bad glow plug on the right bank i haven't had a 30 amp failure. All of this was new to me and i would not be using my truck if not for everyone who replied and of course this website. thanks you all