JUST BOUGHT THIS TRUCK FROM HUBBARD TRAILERS, IN ARIZONA, WITH A RECEIPT FROM HAVING BOTH REAR BRAKES REDONE. DROVE IT HOME THEN TOOK IT TO THE LOCAL FL DEALERSHIP (NAMPA, ID) TO GET AN OFFICIAL INSPECTION. ON INSPECTION THE ABS AND BRAKE LIGHTS WERE ON. WORK WAS DONE, AND I WAS TOLD EVERYTHING WAS FINE ON THE TRUCK RE:BRAKES. I DROVE IT HOME, ABOUT 30 MILES AND NO PROBLEM. FIRST TIME I TRIED TO TAKE IT OUT ON A TRIP, THE REAR CALIPER LOCKED UP. CALLED NAMPA FREIGHTLINER, MULTIPLE TIMES, WHILE STOPPED ON SIDE OF ROAD. THEY ADVISED TO BLEED THE BRAKES, WHICH I DID. STARTED OFF AGAIN, REAR CALIPER LOCKED UP, PULLED TRUCK OVER AND FOUND FIRE IN THE REAR UNDERCHASSIS.