Hi, When I installed the Tekonshia Primus IQ brake controller in our 2015 Windsport 27K I used a cable that was made for installing that controller in a F53 chassis. I ordered both the controller and cable at the same time from the same supplier. There were may different cables available for the various chassis.The hardest part of the installation was getting to the chassis connector witch I found taped to the right side of the steering column up under the dash. I think I got everything from Etrailer.com but I am not positive. Good luck.
John
Willard,OH
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