Its pretty easy to do. Lay on your back and look up into the rear corner on each side of the bumper. You will see a dirt covered grey clip type object with a buch of wires coming out each side. Put some safety glasses on, use a small screwdriver to lift the locking tab, and pull apart. The new harness has a fitting that now goes between the two halves of the pulled apart original. (the glasses are to keep the dirt out of your eyes, believe me you will need them). The original wire harness clip was a bit difficult to pull apart, and definately watch out for the spare tire hole. I had the wires all nicely wire-tied to my hitch and then when I went to drop the spare it was like <img src="/forums/images/graemlins/angry.gif" alt="" /> DOH!