My 1986 Ford Bronco has passed all but the safety inspection. It failed because of the right rear passenger brake and signal light will not work. Everything else works except the blinker and brake portion of the light on that particular side. The back up light, regular driving lights work, but the filament inside the bulb for the brake and signal will not work. I have checked the socket, fuses, wires, and everything is getting power. I also tried every type of possible bulb with no success. Please if you have any suggestions respond. My Bronco is my daily driver and this posing serious transportation problems.