LAIKOU 4-Pin Plug-and-Play Trailer Wiring Harness for Jeep Wrangler JL/JLU 2018-2026 - 4-Way Connector, Protective Conduit

LAIKOU’s 4-pin plug-and-play tow hitch wiring harness provides a direct, factory-style connection to power trailer lights on Jeep Wrangler JL/JLU models from 2018–2026.

This wiring harness is built for Jeep owners who need a reliable, vehicle-specific solution to connect trailer tail lights, turn signals and brake lights without splicing or guesswork. Designed to match the Wrangler JL/JLU electrical layout, including 2-door, 4-door, 4xe, Rubicon 392 and diesel variants, the kit uses durable materials and a protective conduit to reduce exposure to road grime and moisture while keeping installation fast and reversible.

How does this harness make trailer lighting hookup simpler?

The LAIKOU harness is plug-and-play, so it mates with your Wrangler’s factory tail light connectors and routes a 4-way trailer plug to the hitch area. No cutting factory cables or complex wiring diagrams are required, which minimizes installation time and wiring errors.

• Direct fit for Jeep Wrangler JL/JLU 2018–2026 models
• Pre-terminated 4-pin trailer plug ready at the hitch
• Color-coded wires for easy identification during install
• Includes zip ties for tidy routing and secure mounting

What materials protect the wiring from weather and wear?

The harness uses a reinforced protective tube combined with tin-plated terminals and quality plastics to fend off corrosion and abrasion. This construction is aimed at preserving conductivity and avoiding short circuits caused by water, salt, or road debris.

• Tin-plated brass terminals for reliable electrical contact
• Durable rubber and plastic housings to resist moisture ingress
• Outer harness tube shields cables from dirt and chafing
• Designed to minimize exposure near exhaust and high-heat areas

What’s involved in the installation process?

Installation follows a straightforward routing plan: connect the color-matched wires to each tail lamp, run power to the battery, and mount the 4-way connector at the hitch crossmember. The harness comes with clear guidance and fasteners to keep the assembly neat and secure.

• Yellow wire: driver-side tail light; Green wire: passenger-side tail light
• Power lead to vehicle battery for 12V operation
• Hang the 4-way connector on the hitch cross beam, away from the exhaust
• Included cable ties to secure run and prevent rubbing or snagging

Will this harness work with my specific Jeep model and accessories?

The harness is engineered for the full JL/JLU range from 2018 through 2026 and accommodates common factory options. It’s compatible with standard tail light circuits and is suitable for trailers using a 4-pin lighting connection.

• Compatible with 2-door and 4-door Wrangler JL/JLU 2018–2026
• Supports Wrangler 4xe, Rubicon 392, and diesel variants
• Not intended to alter factory wiring—keeps original systems intact
• Works with trailers using standard 4-way lighting plug

Who is this for: The LAIKOU 4-pin tow hitch wiring harness is aimed at Jeep Wrangler owners who want a clean, dependable trailer lighting connection without permanent modifications. It’s ideal for drivers who tow occasionally or regularly, prefer OEM-fit solutions, and want corrosion-resistant materials and a protected cable run for long-term use. The kit ships with everything needed for a tidy install and is backed by a 12-month warranty and a 30-day satisfaction policy.