DROVE VEHICLE TO A STORE, WHILE INSIDE AN ELECTRICAL FIRE STARTED UNDERNEATH FUSE BOX WHILE THE VEHICLE WAS PARKED. FIRE MEN STATED VEHICLE WAS ATTEMPTING TO START ITSELF WITHOUT KEYS AND WITHOUT BEING ON. HEADLIGHTS N DASH REMAINED ON AND VEHICLE BEGAN TO SMOKE VERY BADLY, WOULDN'T QUIT UNTIL BATTERY WAS DISCONNECTED AND NEEDED TO BE EXTINGUISHED. ELECTRICAL FIRE PROGRESSED TO DASH AND MELTED WIPER SHIFTER OFF.