Same problem. 98 ford expedition. Everything worked until I hooked up a new-to-me snowmobile trailer. The pigtail off the hitch got extremely hot. Didn't think anything of it. Drove 3 hours and a motorist yelled at me and said my blinkers don't work. I tested the trailer and all of the lights, blinkers and brake lights work. The blinker and brake lights don't work on the truck. I also checked all of the under dash fuses and the fuse box in the engine compartment...nothing blown. Does anyone have any suggestions?
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Couple of questions. Is the hook-up to snowmobile trailer a 4 wire, 5, 6, or 7.? Does the vehicle your towing with have different lens for brake & signal, such as amber for signal & red for stop?
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