4 Wire Trailer Wiring Diagram. They also provide a wire for a ground connection. In this video we go over how easy and fast it is to convert a 4 flat harness to a 7 way. Depending on the size of your trailer and the number of lights you might want to check on the internet for the recommended gauge for your specific trailer.
They also provide a wire for a ground connection. 3 4 inch by 1 inch 6 way rectangle connectors right turn signal green left turn signal yellow taillight brown ground white. Buy a 4 pin wiring kit with wires at least twenty feet in length so it s long enough for your trailer. In this video we go over how easy and fast it is to convert a 4 flat harness to a 7 way.
While the basic configuration is a 4 way flat connector that features one female and three male ends you may come across connectors with up to seven pins for additional functions that require wiring including electrically actuated brakes power source for a winch etc.
4 wire trailers are probably the most common type of trailer and almost exclusively used when it pertains to non commercial flatbed or cargo type trailers. Does your vehicle have a 4 flat trailer wiring harness but you need to tow a trailer with a 7 way harness. Start by cutting the white wire and attaching it to the trailer frame. 1 4 wire the first 4 pins white brown yellow green just like the 4 pin connector above. Wiring instructions for optronics 4 1 2 inch round trailer stop turn and tail light st40rb installing a trailer wiring harness on a 2012 ford focus can trailer 4 way be ran to trailer with 8 wires for trailer wiring.