This 42" Adapter Harness allows you to plug your trailer wiring into a 7-Round RV connection on the tow vehicle. It includes a 4-Flat Plug for the standard trailer lighting harness and has a 2 Flat for the Disc Brake "Back-Up" Solenoid that is hooked up through the back up lighting circuit of the tow vehicle for ease of backing.
Makes a convienent way for hooking up trailer wiring to factory tow packages.