Oyviny 7.5ft 7-Pin Truck Bed Trailer Wiring Extension — Universal 7-Way Harness with Dust Cap and Heavy-Duty Loom

Oyviny's 7.5-foot 7-pin truck bed extension adds a factory-style 7-way outlet to your truck bed so you can quickly plug in a gooseneck or fifth-wheel trailer without cutting or splicing.

This universal 7-way extension harness is built to preserve your vehicle's factory socket while giving you a second, conveniently located 7-pin plug in the truck bed for gooseneck and fifth-wheel towing. It uses heavy-gauge copper conductors, a protective loom and a spring-loaded dust cap to resist dirt and moisture. The plug-and-play design fits many common truck models and arrives with mounting hardware for a straightforward install.

Will this 7-way harness work with my truck model?

The Oyviny extension is designed to be compatible with a wide range of popular trucks from the late '90s through recent model years. It connects to the factory 7-way RV socket and preserves that original connection while adding the bed-mounted outlet. Check your vehicle model and year against the compatibility list before purchase.

• Fits many Ford F-Series (including select 1997–2021 F150/F250/F350/F450/F550 models)
• Compatible with Chevy/GMC full-size trucks (1999–2021 Silverado/Sierra families)
• Works with Dodge/Ram, Nissan Titan and Toyota Tundra models listed in product details
• Ideal for trucks used with fifth-wheel and gooseneck hitch setups

How does the extension protect wiring from the elements?

This harness uses a heavy-duty black wire loom to bundle and shield the conductors, while a spring-loaded dust cover seals the 7-way socket when not in use. The combination reduces exposure to road debris, moisture and UV, helping the connector and wiring last through regular towing cycles.

• Spring-loaded dust cap keeps out water and dust
• Durable ABS connectors resist impact and weathering
• Black wire loom shields conductors from abrasion and sun
• Included zip ties and screws secure routing to avoid chafing

Is the wiring durable and easy to install?

Yes. The harness is constructed from 10AWG/12AWG/16AWG bonded pure copper wires for dependable electrical performance and flexibility. It’s a plug-and-play solution that connects to the factory adapter without cutting splices, and the package includes basic fasteners to mount the bed outlet cleanly.

• No cutting or splicing—plugs into factory 7-way socket
• Mixed-gauge pure copper conductors for power and signal needs
• 7.5-foot length gives clearance for common bed configurations
• Comes with zip ties and screws for tidy, secure installation

What functions does the 7-way extension support for trailers?

The 7-way plug delivers the standard set of trailer circuits that most gooseneck and fifth-wheel setups rely on, from lighting to electric brakes and battery/aux power. This makes it suitable for hauling trailers that require serviceable brake power and auxiliary feed in addition to signaling.

• Tail, brake and turn signal circuits
• Reverse light circuit compatibility where applicable
• Electric trailer brake control circuit
• Auxiliary/battery feed for trailer systems

Who is this for? The Oyviny 7-way truck bed extension is intended for truck owners who tow gooseneck or fifth-wheel trailers and want a durable, factory-friendly way to add a bed-mounted 7-way outlet. It’s a practical choice for ranchers, contractors, recreational haulers and anyone who needs a reliable, weather-resistant tow connection without modifying factory wiring.