I WAS COMPLETING A 3 HOUR DRIVE OF APPROXIMATELY 120 MILES (I HAD LESS THAN 5 MILES TO GO TILL I ARRIVED AT MY DESTINATION) WHEN MY SENSORS STARTED LIGHTING UP MY MESSAGE BOARD AND DASH SYSTEM. I WAS IN THE LEFT TURN LANE TO ENTER THE ON-RAMP TO US65 SOUTH WHEN THIS HAPPENED SO I PULLED OFF TO THE SHOULDER TO INVESTIGATE. I HAD JUST PUT MY TRUCK IN PARK WHEN A CAR PULLED UP AND SAID THAT MY ENGINE WAS ON FIRE. WHEN I GOT OUT TO LOOK, THE FIRE WAS ROLLING OUT FROM UNDER THE DRIVERS SIDE WHEEL WELL. AS WELL, THERE WAS EITHER A FLUID OR MELTED PLASTIC DRIPPING DOWN TO THE ASPHALT THAT WAS ALSO ON FIRE. THE FIRE APPEARED TO PUT ITSELF OUT, FOR THE MOST PART, PRIOR TO THE FIRE COMPANY ARRIVING WITHIN THE NEXT 10 MINUTES. I HAD, WHAT I BELIEVED TO BE AT THE TIME, RECALL WORK DONE BY MIKE RAISOR FORD IN LAFAYETTE, IN, LESS THAN 1 YEAR AGO. IN THAT RECALL WORK, I THOUGHT THE BLOCK HEATER WAS DISCONNECTED SO AS TO PREVENT AN ENGINE FIRE SUCH AS THIS. NOW, I AM HAVING DOUBTS AS TO WHETHER THIS WAS COMPLETELY DISCONNECTED. NHTSA CAMPAIGN NUMBER IS 18V894000 AND FORDS RECALL NUMBER IS 18S45.