Trailer Plug Wiring Schematic

The trailer wiring diagrams listed below should help identify any wiring issues you may have with your trailer.

Trailer plug wiring schematic. Extrapolate the same expansion for additional axles. Only the blue brake and white ground wires are different. Trailer wiring diagrams 4 way systems 4 way flat molded connectors allow basic hookup for three lighting functions. 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.

4 way tow vehicle side. Right turn signal stop light green left turn signal stop light yellow taillight license side marker brown and a ground white. Note that this type of 4 pin connector is less common that 4 pin flat connector. 4 pin trailer wiring diagram.

If your vehicle is not equipped with a working trailer wiring harness there are a number of different solutions to provide the perfect fit for your specific vehicle. The image above shows a single axle trailer and the next image shows wiring for tandem axles. This type of connector is normally found on utvs atvs and trailers that do not have their own braking system. 4 way and 5 way flat connectors use color coded wires and are available in a variety of lengths.

Below is the generic schematic of how the wiring goes. These 2 wire diagrams fit the needs for most trailers. They can be purchased as a standalone plug for the truck or trailer or as a complete loop. Complete with a color coded trailer wiring diagram for each plug type this guide walks through various trailer wiring installation solution including custom wiring splice in wiring and replacement wiring.