from what i see that is a lot like the one i purchased for 45$ but keep in mind that you still have to tie into your wiring somewhere,somehow. that is what makes the kayuraka? kit so nice it's a direct plug between that's right under your seat. other's you will have to splice, or use the line connectors that leave your wiring harness cut? not sure if cut is the right use, but you will have to break the wires protective cover to get in and make the connection.

 

I built an isolation device for my old Caravan when I used to pull my camper with it. Went to the U-Pull-It junkyard and got a handfull of relays. Needed 4 of them (LT/Stop, RT/Stop, Marker, Backup). Had some of the 4 colored wire left over from rewiring my utility trailer. Bought a length of 10ga power wire, a fuse holder, and some spade connectors.

Works really well, and I further modified it by putting a relay inline of the power feed so I could turn it off the feed if I didn't need it.

 

Look around for the best price on a Hoppy 46255 isolator, then get it. It's $59.95 right now on amazon.com, maybe you could find it cheaper somewhere else. I doubt you could homebrew one for less once you include the time and hassle.