Ford Oem Connector | etrailer Tow Ready Fifth Wheel and Gooseneck Wiring Harness 7-Pole - GM, Ford, Dodge, Nissan and Toyota w/ Factory Tow Features: Harness is 7-1/2' long to help reach truck bed Simply plugs between the OEM wiring harness and the factory installed 7-way connector Retains use of factory 7-way at rear of vehicle. Custom Fit. Fifth Wheel and Gooseneck Wiring 2019 Ford F-150 Trailer Wiring | etrailer Features: Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree-angled connector fits into tight spaces.