VEHICLE WAS PARKED FOR THE WEEKEND IN MY DRIVEWAY AND ON MONDAY MORNING ABOUT TO LEAVE FOR WORK THE TRUCK STARTED CRANKING OVER. THE TRUCK WAS LOCKED AND THE KEYS WERE INSIDE MY HOUSE. BEING A STANDARD WHILE IT WAS CRANKING IT WAS HEADING IN REVERSE. NO VISUAL FLAMES WERE SEEN BUT HEAVY WHITE SMOKE WAS POURING OUT FROM UNDER THE HOOD. HAD TO USE MANUAL KEY TO UNLOCK THE DOOR AND PUT TRUCK IN NEUTRAL, I THEN ROLLED THE TRUCK DOWN MY DRIVEWAY AND THEN UNHOOKED THE 2 BATTERIES AND SMOKING STOPPED. AFTER THINGS CLEARED I COULD SEE BURNT/MELTED PLUG ENDS FROM WIRING HARNESS TO FUSE BOX. THE TRUCK HAS BEEN AT DEALERSHIP FOR (6) WEEKS NOW. END OF WEEK 5 THEY GOT IT TO START UP BUT NOTHING ON THE COMPUTER PAST THE FIREWALL READS. TO DATE THEY HAVE REPLACED (3) WIRING HARNESSES, THE FUSE BOX AND A CLUSTER AND STILL AT A LOSS AT WHY COMPUTER WILL NOT READ ANYTHING. AS OF TODAY THE ENTIRE INTERIOR IS OUT OF THE TRUCK AND THEY ARE CHECKING EVERY CONNECTION, RELAY AND WHAT EVER ELSE THEY CAN TO GET IT FIXED. THERE WAS ALSO AN INSPECTOR THRU CHRYSLER CARE WHO INVESTIGATED IT BEFORE WORK WAS STARTED. THEY BASICALLY TOLD ME TO OPEN AN INSURANCE CLAIM. THANKS FOR THE HELP.