Oyviny 4-Way Trailer Wiring Harness for 2011–2019 Ford Explorer — Pure Copper, 78" Plug-and-Play

Oyviny's custom 4-way trailer wiring harness gives 2011–2019 Ford Explorer owners a direct, factory-fit connection to power trailer tail, brake and turn lights without cutting or splicing.

If you tow with a Ford Explorer from model years 2011 through 2019, this vehicle-specific wiring harness provides a reliable, easy-to-install 4-way flat connector that plugs into your factory harness. Built with pure copper conductors and tin-plated terminals inside a corrosion-resistant connector, the assembly is wrapped in a protective nylon loom and includes a rubber dust cover to keep the socket clean when not in use. The 78-inch lead gives ample reach for common towing setups while preserving factory electrical integrity.

How hard is it to install this harness on my Explorer?

Installation is designed to be straightforward: the harness is a plug-and-play replacement that mates to the existing factory connector on your Explorer so no wire cutting or splicing is required. Most owners can complete the job with basic tools and minimal time.

• Direct-fit connector designed for 2011–2019 Ford Explorer factory harness
• No tools beyond basic hand tools typically needed
• No cutting, splicing, or vehicle wiring modifications required
• Includes rubber dust cover to protect socket after installation

What materials and protections keep the wiring reliable over time?

The harness uses pure copper wiring for strong conductivity and tin-plated copper terminals for improved corrosion resistance. The connector housing is corrosion-resistant and the entire cable run is bundled in a black nylon loom to reduce abrasion and environmental damage.

• Pure copper conductors for low electrical resistance
• Tin-plated copper terminals resist corrosion at contact points
• Corrosion-resistant 4-pin connector with easy-grip design
• Nylon wire loom and rubber dust cover protect against moisture and debris

Which lights will this 4-way flat connection control on my trailer?

The standard 4-way flat connector supplies power for essential trailer lighting: tail lights, brake lights, and left and right turn signals. It covers the fundamental lighting functions required for safe towing of small to medium trailers.

• Tail/marker light circuit
• Brake light circuit
• Left and right turn signal circuits
• Compatible with trailers that accept a 4-way flat plug

Will this harness work for longer or custom towing setups?

The 78-inch cable gives flexibility for typical hitch placements and some accessory routing, but very long or custom installations may need extensions or additional routing hardware. Always route and secure wires away from moving parts and hot surfaces.

• 78-inch length accommodates common hitch locations
• Easily trimmed and secured with zip ties or clamps if needed
• For long trailer tongues or specialty rigs, consider an approved extension
• Keep wires bundled and protected from exhaust and suspension components

Who is this for: this Oyviny 4-way trailer wiring harness is intended for Ford Explorer owners (2011–2019) who want a factory-style, plug-and-play trailer light connection built for dependable conductivity and corrosion resistance. It's ideal for daily drivers, weekend boat or utility towing, and anyone who prefers an OEM-fit replacement without modifying their vehicle's wiring.