NHTSA complaint: 1998 CHEVROLET TAHOE — ELECTRICAL SYSTEM
DRIVER SIDE WINDOW SWITCH CAUGHT FIRE SHORTLY AFTER USE (SEVERAL HOURS). A LIGHT RAIN STORM CAME WHILE THE WINDOWS WERE DOWN. SOME RAIN ENTERED THE INSIDE OF THE VEHICLE, SOME WATER LIKELY GOT INTO THE SWITCH ASSEMBLY. THIS ALL HAPPENED WHILE VEHICLE WAS PARKED ON THE CURB AND IGNITION WAS OFF. I TOWELED OFF THE INTERIOR AND SWITCH ASSEMBLY OFF, IT DIDN'T APPEAR MUCH WATER ENTERED THE SWITCH. THE VEHICLE WAS PARKED AND "OFF" THIS WHOLE TIME. I TURNED IGNITION ON TO ROLL WINDOWS BACK UP, AND PROMPTLY TURNED THE IGNITION BACK OFF. SOME HOURS LATER, THE SWITCH ASSEMBLY CAUGHT FIRE AND THE VEHICLE WAS A TOTAL LOSS. THIS FIRE WASN'T DISCOVERED UNTIL THE NEXT DAY AS IT SELF-EXTINGUISHED. THE BATTERY WAS NOT DISCHARGED AFTER THE FIRE, SO IT WAS NOT A DEAD SHORT IN THE WIRING. I BELIEVE THE AUTO-DOWN CIRCUIT BOARD OR THE ELECTRIC MIRROR SWITCH WAS THE CAUSE. AFTER THE FIRE, THE PASS SIDE MIRROR WAS FULLY EXTENDED AWAY, AT SOME POINT THE CONTACTS WERE CLOSED CAUSING THE MIRROR TO MOVE, DESPITE THE IGNITION BEING "OFF". THIS HAPPENED EITHER DURING THE FIRE, OR THE SWITCH WAS THE CAUSE OF THE FIRE. THE IGNITION WAS ONLY "ON" FOR ABOUT 30 SECONDS THAT WHOLE DAY PRIOR TO THE FIRE, JUST LONG ENOUGH TO ROLL UP THE WINDOWS.
National Highway Traffic Safety Administration — Office of Defects Investigation