Trailer Wiring Diagram For 4 Way, 5 Way, 6 Way and 7 Way 6 Way System, Rectangle Plug. 3/4 inch by 1 inch 6 way rectangle connectors right turn signal (green), left turn signal (yellow), taillight (brown), ground (white). The red and blue wire can be used for brake control or auxiliary. Use on a small motorcycle trailer, snowmobile trailer or utility trailer. 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting In order to install a 7-way trailer connector on your 2002 Ford F-450, I recommend using the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring part # HM40975-11998. Unfortunately, we do not have any plug and play trailer connectors compatible with your vehicle therefore hardwiring will be your only option. Roadmaster Brake-Lite Relay Kit for Towed Vehicles - e trailer Since the 7-way connector is much more common than the 6-way I would recommend replacing the 6-way on your trailer with a 7-way that matches your vehicle directly. Easy solution for that is the part # A10-7081VP. I attached a diagram for 7-ways for you to check out as well as one for a 6-way to help make the transition easy. view full answer..
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