How to Wire up a 7 Pin Trailer Plug or Socket . Wiring up a 7 Pin Trailer Plug or Socket is a simple and easy process, especially with the following step by step instructions and video demonstration provided. Generally it is the same process with all brands of 7 Pin Trailer Plug or Sockets, however in this demonstration, we will be using the KT Range of Trailer Plugs &⦠ktcables.wordpress.com
