Standard 4 Wire Trailer Wiring Diagram

This vehicle to trailer wiring harness creates a standard trailer wiring connection by plugging into vehicle harness and tail light assembly and then routing the 4 way harness to the rear end of a vehicle.

Standard 4 wire trailer wiring diagram. Standard 4 pole wiring harness for use with vehicles that have adequate power and standard wiring system these simply connect into existing wires on the vehicle and have a 4 pole flat connector to attach a trailer. The red and blue wire can be used for brake control or auxiliary. Blue electric brakes or hydraulic reverse disable see blue wire notes below in the trailer wiring diagram and connector application chart below use the first 5 pins and ignore the rest. Trailer wiring kit and supplies.

4 way trailer connectors are typically used on small trailers such as boat snowmobile utility and other trailers that that do not use brakes. I have had to mess with trailer wiring for years once or twice a year anyway and i just cannot keep the color code right ect white ground brn running lights grn right turn yellow left turn. Use on a small motorcycle trailer snowmobile trailer or utility trailer. 4 way trailer connectors are.

1 4 wire the first 4 pins white brown yellow green just like the 4 pin connector above. If you own an older vehicle chances are it will have neither trailer package factory installed nor t connectors available for it. Can also be used as custom wiring on trailers with 3 light wire systems. Yellow and green are for left and right turns and braking.

3 4 inch by 1 inch 6 way rectangle connectors right turn signal green left turn signal yellow taillight brown ground white. Start by cutting the white wire and attaching it to the trailer frame. The most common wire thickness for a trailer is 16 gauge but i bought thicker wiring for added durability. Following the standard method for wiring a trailer connector is vital to the safety of your vehicle while towing.

Use this 4 pin trailer wiring diagram to properly wire your 4 wire trailer plug. Standard color code for wiring simple 4 wire trailer lighting question. 7 way plug wiring diagram standard wiring post purpose wire color tm park light green battery feed black rt right turn brake light brown lt left turn brake light red s trailer electric brakes blue gd ground white a accessory yellow this is the most common standard wiring scheme for rv plugs and the one used by major auto manufacturers today. Converter for use with vehicles that have separate turn and brake light wires.

The four wires control the turn signals brake lights and taillights or running lights. Buy a 4 pin wiring kit with wires at least twenty feet in length so it s long enough for your trailer. They also provide a wire for a ground connection. You must check the trailer manual to see if the wiring is correct but normally the white wire is called the ground wire while the brown wire is used for tail lights.