Oyviny 7-Way to 4-Way Trailer Adapter — 7.5ft Coiled Cable, PU Jacket & 18AWG Copper

The Oyviny 7-way to 4-way coiled trailer adapter converts a vehicle's 7-pin blade connector into a 4-pin flat plug, giving a simple, stretchable, waterproof wiring solution for towing.

This compact, heavy-duty adapter is built for drivers who need to link modern 7-pin RV sockets to older 4-pin trailers without splicing or extra hardware. Featuring a 7.5-foot maximum reach with a coiled memory cord, PU jacket protection and pure copper 18AWG conductors, the adapter focuses on reliability and convenience in a small package.

How does this adapter make towing simpler?

The Oyviny adapter eliminates the need to carry multiple loose plugs or perform on-the-spot rewiring. It plugs directly into a 7-way blade vehicle connector and presents a standard 4-way flat trailer plug, so you can tow trailers with a four-pin electrical system immediately.

• Direct plug-and-play design: no splicing required
• 2 handle hooks on both connectors for easier grip
• Converts lighting and basic trailer functions from 7-pin to 4-pin
• Compact, single-piece adapter replaces multiple adapters

Will the coiled cable hold up to outdoor use and towing movement?

The coiled construction is designed to stretch when needed and retract to avoid dragging on the ground, reducing wear during turns and reversals. The outer PU jacket resists abrasion, sunlight and temperature changes to protect the 18AWG copper wires inside.

• PU jacket offers temperature and wear resistance
• Coil keeps cable off the road and reduces tangling
• Rubber dust cover seals connector when not in use
• Durable 18AWG pure copper conductors for stable conductivity

What length and reach should I expect from this 7.5ft adapter?

The adapter’s total stretched length reaches about 7.5 feet (90 inches) while its normal coiled working length measures roughly 5.5 feet (66 inches). Confirm these dimensions against your tow setup to ensure there’s enough slack during turns and docking.

• Stretched length: approximately 7.5ft / 90 inches
• Normal working (coiled) length: about 5.5ft / 66 inches
• Compact when retracted for tidy storage
• Suitable for most truck-to-trailer distances within these limits

How easy is installation and ongoing use?

Installation is straightforward — simply plug the 7-pin blade into the vehicle socket and the 4-way flat into the trailer receptacle. The adapter is designed for quick connecting and disconnecting, with grip hooks to help manage plugs in wet or cold conditions.

• Plug-and-play: no tools or wire splicing required
• Grip hooks on both sides for easier handling
• Rubber dust cover keeps contacts clean between uses
• Low-maintenance construction for repeated towing cycles

Who is this for: The Oyviny 7-way to 4-way coiled adapter is ideal for RV owners, pickup drivers and anyone who needs to tow older trailers from vehicles with modern 7-pin connectors. It suits users who want a durable, weather-resistant, and easy-to-store wiring solution without altering vehicle or trailer wiring. If you need reliable basic trailer lighting and a tidy cable that resists dragging, this adapter provides a practical, plug-and-play option.