Finally got around to doing my trailer.
Only difference is I wired mine to my cab. It's wired in on the park lights so they will come on when you unlock the truck. There's a switch on the dash so I can then turn them off. I also wired out my running boards so everything lights up. I used a quick disconnect at the back of the truck where the 7 pin is and fished the wire through the existing wiring harness from the trailer. Can't wait to see it roll in the dark at the boat launch. The street lamp outside my house is too bright.
The pictures makes it look purple. It is blue.