Originally Posted by
tylus
Ford follows the standard wiring convention for 4 pin connectors. I went out and checked my Expy and F-250. They both follow the same color pattern
ground - White wire
left - Yellow wire
right - Green wire
brake - Brown wire
here is a good diagram for the standard trailer wiring setup
Trailer Wiring Diagrams | etrailer.com
Thanks. I was looking more for the internal wiring in the truck from the trailer connector to the fuses/relays, etc.