If you want lights and no trailer brakes......you can get a plug that T's ito your rear harness. And Viola! Instant trailer lights. You can get them at Wal-mart in the campng section.

 

most trucks that we build now come with the trailering package ('bout 90%), they might make a plug and go style for the newtrucks. the tail lights are all connected to a distribution block located on the driver side right behind the bumper. the top grey one is for the left taillight and the bottm black one is for the right...(03-04) left and right on 99-02