Oyviny 4-Pin Trailer Wiring Harness for 2007–2018 Jeep Wrangler JK/JKU — 16AWG Copper, Plug-and-Play

Oyviny 4-pin trailer wiring harness delivers a plug-and-play electrical connection that powers trailer lights for 2007–2018 Jeep Wrangler JK and JKU models without cutting or splicing.

This harness is engineered specifically for Jeep Wrangler JK and JKU vehicles (2007–2018), including Sahara, Rubicon, Unlimited and Sport trims, and fits both 2-door and 4-door models. It uses a standard 4-pin flat connector to transmit turn signals, tail lights and brake lights from the tow vehicle to the trailer. Built with 16AWG pure copper wires, ABS connector housing and a protective nylon loom, the assembly balances reliable conductivity with long-term durability for towing boats, ATVs, utility trailers and small campers.

How simple is installation on a Jeep Wrangler JK?

Installation is designed to be tool-light and fast: the harness plugs directly into the factory trailer sockets with no wire cutting, splicing or vehicle modifications required. This makes it suitable for DIY installation or quick professional fitment.

• Direct plug-and-play connection to factory sockets — no wiring changes.
• Standard 4-pin flat plug compatible with common trailer connectors.
• Includes rubber dust cover to protect the vehicle socket when unused.
• 74-inch cable length provides flexibility routing to hitch-mounted sockets.

What does the 4-pin harness actually power on the trailer?

The 4-pin configuration supplies the fundamental lighting functions needed for legal towing: tail/parking lights, left and right turn signals, and brake lights. It does not carry auxiliary power or reverse/charging circuits used by larger trailers or RVs.

• Tail and parking light circuit for night visibility.
• Left and right turn signal circuits for lane changes and turns.
• Brake light circuit synchronized with vehicle braking.
• Not intended for trailer battery charging or 12V accessory feed.

Why does wire gauge and materials matter for towing harnesses?

Wire gauge and conductor quality determine conductivity and durability under load and motion. The Oyviny harness uses 16AWG pure copper conductors for reliable electrical transfer and a consistent signal to trailer lighting components.

• 16AWG pure copper wires for efficient current flow and corrosion resistance.
• Black nylon wire loom bundles and shields wires from abrasion and road debris.
• ABS plastic connector housing resists impact and weather exposure.
• Rubber dust cover prevents moisture and dirt ingress when idle.

Will this harness work with my trailer type?

The 4-pin flat connector is one of the most common trailer plugs and suits small to medium trailers that require only lighting circuits. It pairs well with boat trailers, utility trailers, ATV haulers and many small campers.

• Compatible with most boat, utility and ATV trailers using 4-pin flat connectors.
• Not suitable for trailers needing 7-pin auxiliary, electric brakes or battery charging.
• 74-inch cable length helps accommodate various hitch setups and trailer socket placements.
• Designed to work with both 2-door and 4-door Jeep Wrangler JK/JKU models.

Who is this for: The Oyviny 4-pin trailer wiring harness is intended for Jeep Wrangler JK and JKU owners (2007–2018) who need a durable, no-fuss method to transmit lighting signals to a trailer. It’s ideal for weekend boaters, utility haulers, ATV transporters and owners of small campers who require a dependable lighting connection without complex wiring. Choose this harness when you want a factory-friendly, corrosion-resistant wiring solution that keeps trailer lights functioning and visible on the road.