Trailer blinker isn't working

[uchi]

Hey guys, I've got an 09 Sierra, my eight hand side blinker isn't working in my trailer, I've got three trailers actually, two with the four pin and one using the big plug on the truck, all of their running lights work but none of them have a working right hand side blinker. Two of them have new bulbs and we tested one of them on my buddies car a few days ago and all was well. I checked the plug where it goes out the bumper on the truck at the spare tire side and it looked clean. So I'm a little lost as to why it wouldn't be working. Any help or direction would be great

[uchi]

Happened to do some reading on a duramax forum I'm on and someone else had the same issue, turns out gm puts separate fuses for each light on the trailer and one of mine was blown. No idea why, I ran the lights and blinkers and it Seems fine now. Under hood fuses for anyone who runs in to this issue ithe future and finds this post