Does your vehicle have a 7-Way Round Socket with flat blades and your trailer have a 7-Way Round Pin Plug? This adapter is your answer. It converts the vehicle’s 7-Way Round flat pin Socket to a 7-Way Round Pin Plug. Simply plug the adapter in to the 7-Way Socket and you are ready to plug in your trailer’s 7-Way Round Pin Plug.
- This adapter is wired for use with Heavy Duty Trucks.
- The wiring code is shown above in the pictures.
- Will not work with Semi Tractors or Trailers
- 77P on one end with a 87S on the other end.