1993 MERCURY TRACER, 1.9L SOHC. IGNITION CAUGHT ON FIRE. BURNT UP EVERYTHING INCLUDING THE STARTER, IGNITION SWITCH, START SAFETY SWITCH. THIS CAUSED SMOKE IN THE CAB AND ENGINE COMPARTMENT. THEN WHEN I PULLED THE KEY OUT AND WENT TO UNHOOKED THE BATTERY CABLE THE CAR TRIED TO START ITSELF.*AK