6-Way Round Connectors are very common on horse trailers. The 6-way square connectors are more common on campers. In order to make the 6-Way Round Connectors work, you must know how to install it properly to the trailer. There are several functions and color coding for 6-Way Round Connectors. For Right turn the color for that will be green and the minimum suggested wire gauge is 16 and you need to attach the 6-Way Round Connectors to the right turn of the vehicle’s wiring harness and attach the 6-Way Round 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 16 and you need to attach the 6-Way Round 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 12 and you need to attach the 6-Way Round 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 brown and the minimum suggested wire gauge is 16 and you need to attach the 6-Way Round Connectors to the Taillight of vehicle's wiring harness and attach that to the Trailer's taillights. For the brake the color code for that is blue and the minimum suggested gauge is 12 an you need to attach the 6-Way Round Connectors to vehicle’s electric brake control, power for brakes and attach that to the trailer’s Break away switch. And for the Battery, the color code for that is red and the minimum suggested wire gauge is 12 and you need to attach 6-Way Round Connectors to Vehicle’s Fuse block or FUSED battery Lead and attach to the trailer’s Break away kit, interior lights and battery charger.