1989 FORD ESCORT HATCHBACK - A PASSENGER EXITING THE VEHICLE FROM THE REAR SEAT STEPPED ON AN ELECTRICAL CONNECTOR LOCATED UNDER THE CARPET WHICH CAUSED THE +12V AND GROUND WIRES TO SHORT TOGETHER. THIS CONNECTOR IS PART OF THE ELECTRIC FUEL PUMP HARNESS. THE CONNECTOR MELTED, THE WIRE HARNESS BURNED AND THE CARPET SINGED. THERE WAS SMOKE INSIDE THE VEHICLE. *JB