Had the exact problem on Warrior trailer, tail lights worked, no brake lights, left blinker light dim but present. Stopped Wed. at Skeeter Boat Center to buy replacement, met Brandon. He said doubtful needs to be replaced. Said to take screwdriver to plug in from trailer and slightly pry the silver connector arms toward the center they apparently loosen from repeated on/offs (5 or 6 of them I think) than spray lightly with WD40 for corrosion, should be good to go. Try it. My Boats up North so have not tried yet.