1992 TOYOTA CELICA Electrical System Problems

WHILE DRIVING, MY CAR IT STARTED FILLING UP WITH SMOKE. THE SMOKE WAS COMMING OUT OF THE AMPLIFIER, LOCATED UNDER THE PASSENGER SEAT OF MY VEHICLE. TURNING OFF THE VEHICLE DID NOT STOP THE ELECTRICAL CURRENT, THE CAR KEPT FILLING UP WITH SMOKE AND STRANGE NOISES WERE COMMING OUT OF THE SPEAKERS. ALSO, THE RADIO WOULD NOT TURN OFF. NO FUSES BLEW. DISCONNECTING THE BATTERY CABLE FINALLY STOPPED THE CURRENT AND EVERYTHING SHUT OFF . LUCKLY I WAS CLOSE TO HOME, AS THE VEHICLE DID NOT COME EQUIPPED WITH A WRENCH TO DISCONNECT THE BATTERY CABLE IN THE EVENT OF A ROGUE ELECTRICAL CURRENT. PART OF THE CIRCUT BOARD INSIDE THE AMP WAS MELTED. I WOULD LIKE TO WARN OTHERS, WITH THIS PART IN THEIR TOYOTA, OF WHAT TO DO IN THE EVENT THIS HAPPENS TO THEM. THE SITUATION COULD DEFINATELY HAVE TURNED OUT MORE DAMAGING. I WAS LUCKY. I...