Use the 7 pin connector anyway see below and just leave out the last 2 wires. 4 way trailer connectors are typically used on small trailers such as boat snowmobile utility and other trailers that that do not use brakes.

Tirol 5 Way Flat Trailer Wire Harness Extension Connector Plug With 36 Inch Cable Length End Connector
5 wire boat trailer wiring diagram. March 30th in boating freebies by branson werner. How to wire boat trailer lights duration. An extra pin allows using another extra function. Wiring diagram pics detail. Includes 5 and 7 wire plug and trailer wiring schematics. 5 pin boat trailer wiring diagram wiring diagram for a 7 round trailer plug inspirational 5 pin flat trailer wiring diagram boat.
4 way trailer connectors are. Wiring instructions for optronics 4 12 inch round trailer stop turn and tail light st40rb. 5 way trailer wiring diagram allows basic hookup of the trailer and allows using 3 main lighting functions and 1 extra function that depends on the vehicle. Trailer wiring harness recommendation for a 2007 chevy colorado. It shows the components of the circuit as streamlined shapes and the power and signal connections between the devices. Use this as a reference when working on your boat trailer wiring.
Trailer wiring diagrams 4 way systems. 5 wire trailer wiring diagram. They also provide a wire for a ground connection. Assortment of 5 wire to 4 wire trailer wiring diagram. A wiring diagram is a streamlined traditional pictorial representation of an electrical circuit. As the name implies they use four wires to carry out the vital lighting functions.
The four wires control the turn signals brake lights and taillights or running lights. Wiring new 4 way connector on trailer with 5 wires. Wiring new 3 wire light on trailer to replace 2 wire light. Boat trailer color wiring diagram. Right turn signal stop light green left turn signal stop light yellow taillight license side marker brown and a ground white. Utility trailer 03 4 pin trailer wiring and diagram duration.
Signal and brake. If your truck has a built in 7 pin socket but you only need 5 of the pins. 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. Dustin apple 52713 views. Wiring configuration for trailer side marker lights. Auxiliary wire signals trailer brakes to disengage when in reverse.
Lowest prices for the best wiring from optronics. 4 way flat molded connectors allow basic hookup for three lighting functions.