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..

 

Body controller will send power to trailer light relays in the fuse/breaker panel in front of the passenger seat. Those relays should click when the lights turned on, stop or signals activated. There are also breakers that supply power to those relays. Make sure you check all that.

 

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..

 

The ABS is full time power.

 

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..

 

Sorry to hear that. I was hoping for something cheap. Did you boost the truck or something before this all started?

 

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.

 

Sometimes they do lose their programming and simply need to be reflashed.

 

How we can reflashed it ?