Some trailer builders just connect this wire to the frame then connect the ground from all the other lights and accessories to the frame as well.
Ark trailer lights wiring diagram.
Also it must connect with things if included that use the aux power and back up lights too.
5 way trailer wiring diagram allows basic hookup of the trailer and allows using 3 main lighting functions and 1 extra function that depends on the vehicle.
4 way flat molded connectors allow basic hookup for three lighting functions.
Right turn signal stop light green left turn signal stop light yellow taillight license side marker brown and a ground white.
Though trailer lighting systems are available in an array of configurations the most popular is the 4 way system.
As the name implies they use four wires to carry out the vital lighting functions.
The four wires control the turn signals brake lights and taillights or running lights.
Trailer wiring diagrams trailer wiring connectors.
Trailer wiring diagrams 4 way systems.
An extra pin allows using another extra function.
4 way trailer connectors are typically used on small trailers such as boat snowmobile utility and other trailers that that do not use brakes.
It is referred to as such as the system needs a mere four wires for the trailer tail lights turn signals and brake lights to illuminate.
The 4 way system is designed so the right brake light wire and right turn signal are green.
Various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller backup lights or a 12v power supply for a winch or interior trailer lights.
They also provide a wire for a ground connection.