Oyviny 4-Pin Flat Trailer Wiring Harness for Honda Pilot/Passport (2016–2025) — Pure Copper, Plug-and-Play

The Oyviny 4-pin flat trailer wiring harness 56291 provides a plug-and-play electrical connection between compatible Honda Pilot/Passport models and trailers, delivering reliable lighting and signal transfer without cutting or splicing wires.

If you tow a small trailer, boat, ATV carrier or camper with a 2016–2022 Honda Pilot or a 2019–2025 Honda Passport that has the factory tow package, this harness gives you the standard 4-pin flat trailer connection you need. Built with thick pure-copper conductors, a sealed converter, and rubber dust covers, the harness is designed for dependable conductivity, corrosion resistance, and straightforward installation.

Will this plug directly into my Honda's wiring?

Yes — the harness is designed for vehicles equipped with the factory tow package and mates to the original vehicle socket. No cutting, splicing or vehicle modifications are required; simply insert the connector into the vehicle’s existing plug.

• Exact fit for 2016–2022 Honda Pilot and 2019–2025 Honda Passport (factory tow package required)
• Pre-terminated 4-pin flat connector for direct insertion
• Secure latch and rubber boot to keep the connection sealed

How does the harness keep trailer lights bright and reliable?

The harness uses a powered tail light converter built with surface-mount soldering and an epoxy-filled enclosure to maximize light output while managing heat. Pure copper wires ensure low resistance and consistent signal transfer so turn signals, brake lights and running lights remain clear to other drivers.

• Thick pure-copper conductors for superior conductivity
• Surface-mount technology converter for efficient signal conversion
• Epoxy-sealed housing to protect electronics from moisture and debris

What protection does the harness offer against road conditions?

Terminals and the inline fuse holder are fitted with rubber dust covers to shield contacts from water, salt, and grime commonly encountered during towing. The sealed converter and robust cable jacket extend service life and reduce maintenance.

• Rubber dust covers for plug and fuse holder to prevent corrosion
• Durable cable jacket resists abrasion and weathering
• Epoxy-packed converter keeps moisture and contaminants out

Which trailers can I use with the Oyviny 4-pin flat connector?

The standard 4-pin flat plug supports the common lighting functions used by many small-to-medium trailers. It’s a practical choice for utility trailers, boat trailers, ATVs, small campers and other non-brake-equipped towed loads that need running lights, brake lights and turn signals.

• Compatible with boat trailers, utility trailers, ATV trailers and small campers
• Suitable for trailers that use a standard 4-pin flat wiring scheme
• Not intended for trailers requiring electric trailer brakes or 7-pin functions

Who is this for? The Oyviny 56291 harness is aimed at Honda Pilot and Passport owners who have the factory tow package and want a reliable, user-friendly wiring solution for standard 4-pin trailers. It’s ideal for weekend boaters, DIY tow users, and anyone who prefers a neat, factory-compatible connection without professional wiring work. If you need a simple plug-in harness with good conductivity, sealed electronics and weather protection for routine towing, this is a practical, long-lasting option.