Just can not get any easier. I had the seat removed for someother work , so it just made it more easier.

Easy to install but when you get to where it say's remove seat, DON'T. Just feed it through with a hanger. Had this installed in an hour.

We went with the plug and play GL1800 kit that gives 5 wires. 1-ground, 2-brakes, 3-running lights, 4-left turnsignal, 5-right turnsignal. I must say that this unit was very easy to install on a friends bike and I liked the plug and play wiring. The relay was easy to stuff into the open area in the upper inner fender under the top box. We used a stiff wire to fish the power and ground wires from the battery to the rear fender without removing the seat. I don't know why they wanted you to remove the seat. You still have to by your own connectors for the trailer and the bike ends. Get the 5 wire flat ones, They are normally used for trailers with brakes, but the Quick KampII that we were hooking up had modular taillights and we were able to light them all up. The relay is encased in resin so I don't expect any problems with it. Everything went as instructed in the directions and It was successfully installed. I'd use one of these kits on my bike if I ever decided to pull a trailer.