YzusGomumu 4-Way Trailer Wiring Harness for 2019–2024 Hyundai & Kia — OE-Style Fit, Plug-and-Play

YzusGomumu 4 Way Trailer Wiring Harness is a plug-and-play replacement wiring kit made to restore trailer lighting and turn-signal functions on compatible 2019–2024 Hyundai and Kia models.

When a factory trailer connector wears out or becomes corroded, the right harness delivers reliable electrical connections for brake lights, turn signals and tail lamps. This YzusGomumu kit combines precision metal terminals, robust ABS plastic housing and an OE-style fit so you can swap the connector quickly without cutting factory wiring. Check fitment against OE number 56420 and your vehicle year/model before installing.

Which Hyundai and Kia models does this harness fit?

This harness is engineered to match the connector layouts used on recent Hyundai and Kia SUVs and crossovers. It lists specific model years to simplify selection and aims to be an exact replacement for the factory part number. Always verify compatibility with your vehicle’s OE number and the connector shape prior to purchase.

• Compatible models include 2019–2023 Hyundai Santa Fe and 2020–2022 Hyundai Palisade.
• Fits 2022–2024 Hyundai Santa Cruz and 2022–2024 Hyundai Tucson.
• Includes coverage for 2022–2024 Kia Carnival, 2023 Kia Sorento, and 2020–2022 Kia Telluride.
• Designed to match OE number 56420; confirm part number for final fitment.

How does installation work and what tools are needed?

The harness uses a plug-and-play approach so you avoid splicing into factory wiring. That keeps installation faster and reversible, reducing the risk of wiring errors. Most DIYers can complete the swap with basic hand tools and the included instructions.

• Plug connector directly into the factory tow socket—no cutting required.
• Basic tools like a trim remover and screwdriver are typically sufficient.
• Follow the supplied installation guide for secure mounting and routing.
• Allow a quick continuity check with a multimeter to confirm proper connections.

What are the construction features and durability expectations?

The harness uses high-grade ABS plastic for the housing and precision metal terminals for electrical contact. These materials resist moisture, vibration and road debris to maintain consistent signaling. While robust, periodic inspection is recommended to ensure long-term performance and safety.

• ABS plastic housing protects against impact and weather exposure.
• High-precision metal terminals provide tight, corrosion-resistant connections.
• OEM-style dimensions reduce stress on connectors and prevent loose fits.
• Routine visual checks help catch wear or corrosion early.

Will this harness affect trailer electronics or auxiliary systems?

This replacement wiring kit is intended to restore standard 4-way trailer lighting circuits only. It does not add extra circuits for electric brakes or 7/13-pin functions. For trailers requiring additional power or brake control, a dedicated controller or multi-pin adapter is necessary.

• Supports basic stop, turn, tail and ground circuits standard to 4-way connectors.
• Not designed to carry high-current loads for electric trailer brakes.
• Can be paired with factory adapters when upgrading to multi-pin systems.
• Maintains original vehicle wiring integrity without permanent splices.

Who is this for: Owners of compatible 2019–2024 Hyundai and Kia vehicles who need a dependable, OEM-style replacement for a damaged or corroded 4-way trailer connector. It’s aimed at DIY enthusiasts and professional installers seeking a straightforward plug-and-play swap that preserves factory wiring and restores trailer lighting reliability.