I am afraid that you will have to have someone install it for you. Most of us use 4 on the ground towing and have other braking devises. If you tow with a dolly, be sure the dolly is equipt to handle electric brakes. Most of them I have seen do not have brakes. Also your coupling for your running lights and break lights lights are fuse protected inside the fuse box under the dash. A crossed wire can blow a fuse and its hard to get at.