CONSUMER COMPLAINED ABOUT AN ELECTRICAL PROBLEM. THE HORN DID NOT BLOW AND THE VEHICLE CAUGHT FIRE. THE VEHICLE WAS PARKED AND UNATTENDED WHEN IT IGNITED INTO FLAMES. THE FIRE DEPARTMENT WAS NOTIFIED. *AK THE HORN STOPPED BLOWING AND THE VOLUME ON THE STEERING WHEEL STOPPED WORKING THE DAY BEFORE THE TRUCK CAUGHT FIRE. *SC *JB