I PURCHASED A NEW TRAILER TO PICK UP MY NEW TRACTOR. I TESTED THE TRAILER BRAKES KNOWING I WAS PULLING A LARGE LOAD AND DIDN'T WANT AN ACCIDENT. THE BRAKES APPEARED TO APPLY BUT DUE TO IT NOT BEING LOADED WHEN TESTING I HAD IT SET TO 5(OUT OF 10). WHILE PULLING IT BACK HOME ON THE INTERSTATE TOWING MY TRACTOR BEHIND ME THERE WAS TRAFFIC STOPPING AHEAD. I ALWAYS DRIVE IN THE RIGHT LANE TO NOT SLOW OTHERS...THANK GOD I DID. I HAD TO DRIVE OFF THE ROAD ONTO THE SHOULDER TO MISS HITTING OR DRIVING OVER CARS AHEAD OF ME! THE BRAKES TURNED UP TO 10 DID NOTHING TO EVEN SLOW ME DOWN. I WAS TOWING 4 TONS AND 3 TONS FOR THE TRUCK TOTALING 7 TONS, SOMEONE WOULD'VE BEEN KILLED! TOYOTA NEEDS TO FIX THESE TRAILER BRAKES! I CAN'T TOW MY TRACTOR ANYWHERE FOR WORK DUE TO THE BRAKES BEING UNSAFE!