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Vehicle battery connection required
Includes fuse holder, battery connection wiring and other necessary wiring components
Includes fuse holder, battery connection wiring and other necessary wiring components
Warranty: One-Year Limited Warranty
Electrical System Type: 2W
Output Type: 4-Way Flat
Tail Light Circuits: 6.0 Amps
Turn and Brake Circuits: 3.0 Amps
Installation Difficulty: Professional
Installation Time Exact (Minutes): 45
If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness -- also called a T-connector -- is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Hyundai Ioniq (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination -- maybe it's the boat landing at your favorite fishing spot, maybe it's a campsite that overlooks one of nature's masterpieces, or maybe it's the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.
CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
Experts available to answer your questions
Call 888-634-94941 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2017 - 2022 | Hyundai Ioniq | Installation Time: 30-60 minutes |
The CURT 56381 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Hyundai Ioniq (Part #BKDK56381) fits the following vehicles: 2017-2022 Hyundai Ioniq. Always verify your specific year, make, and model before ordering.
Yes, the CURT 56381 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Hyundai Ioniq (Part #BKDK56381) is designed to fit the 2017-2022 Hyundai Ioniq.
The CURT 56381 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Hyundai Ioniq (Part #BKDK56381) fits 2017-2022 Hyundai Ioniq models. The 2022 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56381 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Hyundai Ioniq (Part #BKDK56381) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, Curt part number 56381 is designed for the Hyundai Ioniq Hybrid. This is a custom wiring harness for passenger cars. Verify your vehicle matches the application before purchasing.
The Curt 56381 is a custom wiring harness that integrates with your vehicle's taillight system to provide trailer lighting control. It includes signal circuits rated at 3.0 amps per side and tail/running circuits rated at 6.0 amps total. The harness connects to a 4-flat connector for trailer use.
You will need: 10mm socket, ratchet, ratchet extension, panel trim removal tool, wire stripper, wire crimper, and cutting tool. These are standard automotive hand tools.
Drilling may be required. Step 7 instructs you to locate a suitable grounding point near the taillight connector. If an existing screw with nut is not available in the vehicle's frame, you must drill a 3/32" pilot hole for the provided grounding screw. The manual warns to check for hidden items behind or under surfaces before drilling to avoid damage and personal injury.
Drill a 3/32" pilot hole for the provided grounding screw. The grounding point should be located near the taillight connector on a suitable flat spot in the vehicle's frame, and the area must be free of rust, dirt and paint before securing the white ground wire.
Mount the black converter box on a flat spot inside the vehicle near the taillight using the provided double-sided tape. The converter box should be adhered in place before routing the power wire from the vehicle battery.
Remove the foam tape wrapped around the vehicle's taillight wiring harness connectors and separate them from the taillight housing. Insert the custom wiring harness end with the yellow wire between the separated connectors, ensuring the connectors are fully inserted with locking tabs in place. Repeat this process on the passenger side using the harness end with the green wire.
Route the harness end with the green wire down behind the interior side trim panel and out to the passenger side behind the removed scuff panel. Route the black power wire from the vehicle battery as shown on the included CME-PCL-INS sheet. When not in use, roll up the 4-flat connector and store it in a convenient, out-of-the-way location inside the trunk.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire. Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower.
The harness includes a yellow wire (driver side taillight connection), a green wire (passenger side taillight connection), a white wire (ground connection), and a black wire (power connection from vehicle battery). Each wire has a specific function in the trailer lighting circuit.
After installation, test for proper function by using a test light or by connecting a properly wired trailer. All steps must be followed to ensure the wiring harness functions properly before use.
You must remove: all trunk floor coverings and storage trays, the rear scuff panel (secured by one fastener), the fasteners from the interior side trim panels on both driver and passenger sides, the upper side trim panels, and the push fasteners from the lower side trim panels. Take care not to damage the alignment tabs when removing panels.
Yes. Step 12 instructs you to reinstall all items removed during installation. Also install the provided 4-flat dust cover to help prevent corrosion.
Secure any loose wires with the provided cable ties. This helps organize the installation and prevents wires from becoming damaged or caught when reinstalling panels.
The Curt 56381 includes: the custom wiring harness with yellow and green wire ends, a black converter box, a white ground wire with ring terminal, a provided grounding screw, double-sided tape for mounting the converter box, a 4-flat connector, a 4-flat dust cover, cable ties, and an included CME-PCL-INS sheet with battery power wire routing instructions.
Yes, the Curt 56381 is designed specifically for the Hyundai Ioniq Hybrid passenger car.
You need: 10mm socket, ratchet, ratchet extension, panel trim removal tool, wire stripper, wire crimper, and cutting tool.
The battery connection must use a 10-amp maximum fuse. Exceeding this can cause overheating, fire, and loss of warranty.
Drilling may be required. If no existing screw is available for grounding, you must drill a 3/32" pilot hole in the vehicle's frame near the taillight connector.
Test for proper function using a test light or by connecting a properly wired trailer.
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