5-Way connectors are available allowing the basic hookup of the three lighting functions and besides the ground, one pin is available to provide support for another function. Typically the 5-Way Flat is used for trailers with surge brakes or hydraulic brakes. The additional wire is tapped into the backup lights to disengage the hydraulic trailer coupler when the vehicle is reversing, thus turning off the trailer's brakes.In order to make the 5-Way Connectors work, you must know how to install it properly to the trailer. There are several functions and color coding for 5-Way Connectors.
For Right turn the color for that will be green and the minimum suggested wire gauge is 18 and you need to attach the 5-Way Connectors to the right turn of the vehicle’s wiring harness and attach the 5-Way Connectors to the trailer’s right turn signal. For Left turn the color code for that is yellow and the minimum suggested wire gauge is 18 and you need to attach the 5-Way Connectors to left turn of the vehicle’s wiring signal and attach it also to the trailer left turn signal. For the ground the color for that is white and the minimum suggested wire gauge is 16 and you need to attach the 5-Way Connectors to Vehicle ground point - metal, uncoated, rustproof and attach that also to the trailer’s ground point - metal, uncoated, rustproof. For the tail, the color for that is brownand the minimum suggested wire gauge is 18 and you need to attach the 5-Way Connectors to the Taillight of vehicle's wiring harness and attach that to the Trailer's taillights. And for the brake the color code for that is blue and the minimum suggested gauge is 18 an you need to attach the 5-Way Connectors to vehicle’s electric brake control, power for brakes and attach that to the trailer’s Break away switch.
