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7-Way trailer connectors are found on most recreational vehicles and are used on larger gooseneck, 5th wheel, boat and utility trailers. They supply power to the taillights, turn signals, brake lights, trailer brakes, reverse lights, auxiliary power and include a ground connection. 7 pin trailer wiring diagram with brakes. 7-Way trailer connectors are used by the following vehicle types on most recreational vehicles on larger gooseneck large 5th wheel trailers large boat trailers full-size utility trailers. 7 way trailer wiring diagram is explained in details in the picture and the table below. Trailer Wiring Diagrams Trailer Wiring Connectors Various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller, backup lights, or a 12V power supply for a winch or interior trailer lights. 7-pin trailer wiring is one of the most popular wiring configruations, particularly the traditional configuration versus the SAE J2863. Use this 7-pin trailer wiring diagram to properly wire your 7-pin trailer plug. Find your 7 pin wiring diagram with trailer brakes here for 7 pin wiring diagram with trailer brakes and you can print out. Search for 7 pin wiring diagram with trailer brakes here and subscribe to this site 7 pin wiring diagram with trailer brakes read more. 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. If your truck has a built-in 7-pin socket, but you only need 5 of the pins. Trailer Wiring Diagrams Trailer Wiring Connectors Various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller, backup lights, or a 12V power supply for a winch or interior trailer lights. Wiring Diagram for Pollak Heavy Duty 7-Way part # PK11720 Installing 7-Way Trailer Connector and Brake Controller On 2003 Chevy Blazer No Brake Signal on a 7-Way Round Pole Trailer Connector on an RV r Is it Better to Switch to a 7-Way Blade Style Trailer Connector Over a 7-Way Round Pin 7-Way Trailer Connector for 1996 Airstream Travel Trailer. 7-pin connectors are needed because some trailers need extra connections due to the fact that they have multiple circuits. There are pins for electric trailer brakes, auxiliary power and reverse lights. Thir is standard color code for a trailer light 7wire. White wire Trailer Ground. There is a standard method of wiring a 7-pin trailer connector. If you don't follow this your trailer (or tow vehicle) can't be used with any other implement.