what would make the computer burn up in a 94 lighting? on 1994 Ford F-150 Lightning

Truck was running fine just shut off with the smell of a a coil burning in cab.

Asked by for the 1994 Ford F-150 Lightning
there is a short somewhere whether it is a coil or wiring. thats needs to be repaired before replacing the ecu. failure to do so will result in the new one burning out