CURT Custom Wiring provides everything you need to connect your vehicle's electrical system to a trailer. With plug-and-play connectors, a custom wiring harness easily integrates with your vehicle taillights to provide a standard trailer wiring connector, typically in the form of a 4-way flat. This custom wiring harness features a vehicle-specific design to perfectly fit certain years of the Ford E150, E250 and E350 Super Duty. It uses OEM-compatible connectors to "T" into the vehicle's taillight assembly and provides a standard 4-way flat output to power the taillights, brake lights, and turn signals on your trailer. This custom wiring harness comes with a rubber dust cover. This cover keeps the connection points clean and well protected when the connector is not in use.• Plugs into vehicle taillight assembly to provide a 4-way flat socket• Simple plug-and-play design eliminates the need for cutting or splicing• 4-way flat output connects taillights, brake lights, and turn signals• Dust cover included to keep connector clean when not in useCompatible Vehicles2015-2018 Ford E-Series Cutaway E-350 without factory tow package2004-2014 Ford E-1502004-2013 Ford E-2502004-2013 Ford E-3502004-2014 Ford Van without factory tow package Provides a standard 4-way flat output to power taillights, brake lights, & turn signals Dust cover included to keep connector clean when not in use | Curt 56020 Custom Wiring Harness, 4-Way Flat, Select Ford E-150, E-250, E-350 Super Duty