Ducodden 4-Pin Trailer Wiring Harness for 2018–2025 Jeep Wrangler JL/JLU & 2020–2025 Gladiator JT — Plug-and-Play, Weatherproof 4-

Ducodden 56407 is a plug-and-play 4-pin trailer wiring harness that adds a weatherproof, factory-style 4-way connector to compatible 2018–2025 Jeep Wrangler JL/JLU and 2020–2025 Gladiator JT models.

This wiring harness converts your vehicle’s factory trailer wiring into a standard 4-flat trailer connection without cutting or splicing, making it easy to attach taillights, brake lights and turn signals on a trailer. Built for Jeep models that use manufacturer part numbers 56407 or 118786, the kit uses corrosion-resistant materials and a rubber dust cover to protect the connector from water and dirt. It’s intended for owners who tow occasionally or frequently and want a reliable, tidy electrical interface that matches OE fitment.

Will this harness fit my Jeep Wrangler or Gladiator?

Yes — this harness is designed to fit 2018–2025 Jeep Wrangler JL and JLU models and 2020–2025 Jeep Gladiator JT trucks, including common trims like Rubicon, Sahara and Sport. Check your vehicle’s OE part number (56407 or 118786) before purchasing to confirm compatibility. Note that some 2020–2025 Wrangler Unlimited EcoDiesel variants may be excluded.

• Compatible with model years listed above for JL, JLU and JT
• Fits 2-door and 4-door Wrangler configurations
• Confirm OE number 56407 or 118786 on your vehicle
• May require running a hot lead depending on your installation

How difficult is installation and do I need special tools?

Installation is straightforward: this kit uses a plug-in design that mates with factory wiring so you don’t have to cut or splice harnesses. Basic hand tools are usually sufficient, and the kit includes the 4-pin connector and dust cover. If your vehicle requires a hot lead to be routed, you may need simple wiring tools and basic mechanical access beneath the rear bumper.

• Plug-and-play: no cutting or splicing required
• Standard hand tools recommended for mounting and routing
• Includes rubber dust cover to keep connector sealed
• May need to run a hot lead to the vehicle’s power source

What materials and protection does the harness provide?

The harness uses corrosion-resistant conductive materials to maintain reliable electrical contact in outdoor conditions. A molded rubber dust cover protects the 4-way flat connector from moisture, salt and debris when not in use, reducing the chance of shorts or corroded pins. The overall design is made to withstand road and weather exposure typical of towing use.

• Corrosion-resistant contacts for long-term conductivity
• Rubber dust cover seals the connector when idle
• Molded harness components resist environmental wear
• OE-style fit for consistent alignment and retention

What functions will this harness support on my trailer?

The Ducodden 4-pin harness delivers the essential trailer lighting functions: running lights (tail), left/right turn signals and brake lights. It provides a standardized 4-flat output so you can connect common small trailers, cargo carriers and light-duty utility trailers without needing an adapter. It does not add auxiliary power circuits for brakes or converters.

• Supports tail/running lights, brake lights and turn signals
• Standard 4-flat connector compatible with most small trailers
• Not intended for electric trailer brake controllers or high-current accessories
• Works with factory wiring to preserve vehicle systems

Who is this for? This Ducodden 56407 harness is aimed at Jeep owners who need a clean, durable 4-pin trailer connector without modifying factory wiring — ideal for weekend campers, light haulers and anyone who prefers a weatherproof, OEM-style towing hookup. Double-check compatibility with your model year and OE part number, and plan for routing a hot lead if your vehicle installation requires it.