What he said ^^^
Wasn't there something about the fuel bowl heaters on those? There was a fuse for them and if it blew they wouldn't start. I can't remember if that was on just the obs trucks or if it was on the super duties too. It seems like more of the obs guys had that problem, but it might be worth looking at.
Just OBS trucks.
So does the pcm control the fuel pump relay? Is the pcm the box down by the drivers feet. What is the controller behind the headlight switch? IDM? Thanks for any help. Could someone also recommend a shop manual.
Not sure what powers up the relay, probably simply the ignition switch.
However, when my fuel pump quit on me a while back we had "no power" to it. Test light refused to register any power at the conections to the pump. I replaced the pump on a buddies word that "no power" is common when pumps quit, and hadn't had a lick of trouble since.
The pumps ain't cheap, I know. But get yourself a decent fuel-line removal tool, (10 bucks max) and a pump, and hook up the lines and power wires without actually installin the pump in that bracket. Flip the key and I bet your problem is solved.
If it ain't disconnect the pump ,should still look good as new, and take it back to the parts store. No fuel should get sucked into it if the wiring is in fact the issue.
I'm bettin it's the pump though.