I have a 2016 Colorado diesel and I can’t figure out what’s wrong with the signal going to the trailer. Everything works except the right turn/brake signals. The right running light works fine on trailer. So I figured out it is the truck and not the trailer. So I unhooked the harness from behind bumper to test there and still to right turn/brake signals. I swapped fuses from right to left and everything works on left side still. I also swapped a F24 to F27 one said trailer and other was itbc I think either way still not working. Where would be my next step to finding a fix?