AddendumMy error... inertia switch in in UP position.

Ignition Switch replaced... nothing's changed.The mystery continues. I replaced the ignition switch and still there is a no start situation. What continues to boggle me is the scent of burnt wire/electrical that still is in the cab almost a week after the engine shut down. The same scent...

No dice with the new Ignition Control Module!Well... Replacing the Ignition Control Module did nothing. The truck still turns over, but does not start. My hunch now is to try and figure out what could go bad in the cab (recall the smell of burning wire which still lingers in there). I've...

Thanks!Much appreciated feedback guys... I'll take a look at both. Can the ignition switch just "go out" as after the truck started, I released the key. It was about 20 seconds later that the engine abruptly shut off (it was a bit surprising to me how almost immediate it died).

My ultra-reliable 1992 F250 started as usual yesterday morning, but after about 20 seconds abruptly died out (as if a light switch was flicked off). There was no sputtering, no coughing, just a short cutoff. Soon thereafter I could clearly smell what seemed to be overheated wiring in the cab...