Ford 7 Pin Trailer Wiring Diagram. White pin to your ground. In the round you can get a big size or a small size.
White pin to your ground. Purple for copy lighting. Green pin yellow pin for appropriate brake light and right turn markers.
The second diagram shows two brake lights two indicators two side lights and a fog light.
Usually the big is used on trucks or heavy machinery. Yellow pin for abandoned brake light and left turn mark. Yellow pin for abandoned brake light and left handed mark. Print the wiring diagram off plus use highlighters to trace the signal.