General description This Truck Bed 7-Pin Trailer Wiring Harness Extension is designed to enhance your truck's towing capabilities by providing an additional 7-way plug in the truck bed. It retains the use of the existing 7-way rear RV blade plug, making it a practical solution for connecting various trailer lights and accessories. Technical specifications Type: 7-Pin Trailer Wiring Color: Black Material: Plastic Length of harness: 7 feet Installation hole saw size: 2-1/8 inches Measurement allowed error: +/- 1-3 cm Installation EASY TO INSTALL with no cutting or splicing required. Plugs directly into your truck's existing factory wiring. Usage The trailer wiring harness extension can be used to connect: Trailer taillights Brake lights Backup lights Turn signals Electric trailer brakes Auxiliary power cable Other information The 7-pin truck wiring plug housing is made from molded black plastic. Features a spring-loaded dust cover to protect connection points.