i finally went outside and tested the wiring. synopsis of the problem is that the wiring works, but i randomly blow tail light fuses. replace them and it works fine, even with the trailer plugged in. a few days later though, i notice the lights arent working again. it is always after the trailer has been plugged in. here is what the manufacturer of the trailer has to say about the wiring. my LT, RT, and GND are correct. when i use the brakes i get +12 on the running lights, when i turn on the running lights, i get -12 (however that happens), if i use running lights and brakes lights at the same time, i get 0. i dont get readings on the LT and RT when i use the brakes like i figure i should. i bought a harness for the truck so this is plug N play right now. do i need some type of converter? the strangest part of all, all of the trailer wiring works fine when i test it. if i actually tow the trailer with the wiring plugged in, somewhere throughout the drive it gets blown. ideas?