Trailer marker , turn signal and stop light problems,

Hi, i have 09 pro star, my truck was sitten cpl months, yesterday when i hooked up a trailer, i noticed the trailer marker lights was not working, and i replaced the burned fuse, after i found on trlr both turn signals and the stop lights not working, i checked the all fueses are fine,there is no power coming in seven ways plug from truckside, except in trailer tail light and in abs pronge,,i open the circuit board @truck outside by steershaft there is no power coming for all three trlr markes,signal and stop light,,i also disconect the battery wires for 15 mins,
Any help please..

 

Yes, i will tell my mechanic to check it again @ morning,, also one more thing i noticed ,when i turned on lights the powers is continues coming in abs pronge in 7 ways plug..

 

I got fixed this problem today ,, it was bad body controller,, i swoped with another truck,, now all lights,turn signals and stop lights working on trailer..

 

Yes, today morning ,i took the to international dealer and they clear all active and inactive codes,but problem was still there, so i just swoped the body controller and everything start working,, now i will be try with another truck if bad controller works with that..otherwise i have buy another body controller.

 

How we can reflashed it ?