[buzzinhalfdozen]

As I stated earlier all of the trailer wiring issues can be diagnosed using a battery and some jump leads. Leaving the truck out of the equation eliminates confusion, if everything checks out at the trailer(which I'm fairly sure it will not) it would be an issue of incorrect wiring positions. I've found that breaking problems down to sub categories helps make the diagnosis easier. Start with JUST the trailer it avoids confusion. Good luck and let us know the outcome. Joe