Cm Trailer Wiring Diagram. Brown pin for unwanted markers tail lamps and running lights. Purple for backup lights.
Green pin yellow pin for right brake light and right turn mark. The below information is for reference and is commonly used throughout the industry but can vary depending on who built the trailer. Blue pin for electrical brakes.
4 pin trailer wiring diagram.
Same as 4 way system listed above but adds a extra blue wire for brake. 600 800 lbs. Green pin yellow pin for right brake light and right turn markers. Also it must connect with things if included that use the aux power and back up lights too.