I got mine at etrailers.com. They have a kit, easy to find for the wiring. I've got a '16 and it was just a plug in of a couple relays in the passenger footwell and another plugs into the rear of the truck near the bumper. Instructions are included, as well as a helpful video online.Finally bought a Frontier!! Now I need to get the tow package activation wiring (118525?) done by next weekend! Can anyone tell me the cheapest and fastest way to get 'er done? Thanks!