The Wiring Schematic that we use is:
Pin 1 - Yellow Wire - Left Turn Signal
Pin 2 - Green Wire - Right Turn Signal
Pin 3 - Brown Wire - Running Lights
Pin 4 - Red Wire - Brake Lights
Pin 5 - White Wire - Ground
We use a 5 wire round plug on all our trailers unless
otherwise specified. The bike end harness comes with
your new trailer purchase as well.