I left my trailering wire plugged in and pulled it from the junction box on the RV - I got it all reconnected, but don't have left blinker, brake lights, and my trailer brakes come and go. I cannot figure out where the yellow wire goes (if it goes anywhere) and not sure if I grounded it correctly. Anyone know of a diagram of the trailer wiring that comes from the RV, not just to the plug, but the RV junction box in the neck?