I enclosed the trailer top and bottom with wood sheets to give it more support. between these two sheets sat the wiring. I installed a hinge on one side so I could get at at them if I needed. I drove it down to the DMV and got it licensed as a platform.
Then I put the trailer body on top. and bolted it on. Then I drove it off to my first meet around the mountain at Mantan De Oro. In my driving back and forth between home and camp site the wires got cut by the hitch.
see my alubum
Now I just have Lights but no turn nor brake lights. I conected the broken wire from the truck put on a tester and all worked fine.
I then put on a new coupler on the trailer making sure each wire was with the correct wire color. hooked up the truck same problem. That means that one of the wires in the trailer body .... inside the sandwige of plywood and 2x4 sides.
I have two choises.
1. remove the upper part to which I have not quite figured how.
1a make a Deck to rest the upper body on
1b put it in the bed of my truck.
2. just run a new set of wires and connect to
2a existing lights
2b put in a separte set of LED lights just for brakes and turning.
Why do I like 2b? best, Maybe I'll get a set of Morris Miner lights.

At any...rate if you are making a triler make sure the wires are where you can get at them in emergancies.
The lights worked great and the trailer