This US-made trailer wiring kit powers the lights on a trailer while protecting your bike's wiring system and, on newer bikes, the engine control module. It includes directions specific to the Softail from 2018 to present.
This kit is configured for trailers with 5-wire lighting systems. If you aren't sure which you need, check out this video that explains the differences between the two systems.
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2018 softail trailer wire harness
Works...perfect instructions...wires to the hitch needed to be longer was only issue at 119 bucks