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2024 - 2026 Hyundai Sonata
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Always the correct part
We know our products
Quality Products
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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
Finish: Blank
Electrical System Type: 2W
Tail Light Circuits: 6.0 Amps
Turn and Brake Circuits: 3.0 Amps
Installation Difficulty: Advanced
Installation Time Exact (Minutes): 60
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 Sonata (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 888-634-9494One-year limited
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2024 - 2026 | Hyundai Sonata | — |
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Hyundai Sonata (Part #BKDK56529) is designed to fit the 2024-2026 Hyundai Sonata.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Hyundai Sonata (Part #BKDK56529) fits 2024-2026 Hyundai Sonata models. The 2026 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Hyundai Sonata (Part #BKDK56529) fits the following vehicles: 2024-2026 Hyundai Sonata. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Hyundai Sonata (Part #BKDK56529) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The Curt 56529 is a powered converter system that integrates trailer lighting into your SUV or van's factory taillight wiring. It converts your vehicle's taillight signals (left turn, right turn, brake, and tail lights) to a 4-flat trailer connector. The system includes a converter box, wiring harness with color-coded leads (green for right turn, red for brake, yellow for left turn, brown for tail lights), and a 4-flat dust cover.
The Curt 56529 is designed for SUVs and Vans (designated as 'S' in the manual). The manual does not specify individual vehicle makes, models, or years. Consult the product fitment database or contact Curt Manufacturing to confirm compatibility with your specific vehicle.
Yes. The converter system is designed exclusively for 12-volt negative ground systems. If your vehicle uses a different electrical system, this product is not compatible.
The following tools are required: panel trim removal tool, crimping tool, wire cutter, cutting tool, wire stripper, and fishwire. Proper tools will improve installation quality and reduce installation time.
The kit includes: a black converter box, wiring harness with color-coded leads (green, red, yellow, brown), white ground wire with ring terminal, black power wire, a ground screw, double-sided tape for mounting the converter box, cable ties for securing wires, a 4-flat dust cover, and a fuse holder with 10-amp fuse (to be installed after all other steps are complete).
Yes. You must disconnect the negative battery terminal before beginning installation. Be sure to fasten this wire down and away from the battery when completing the installation process. The battery must be reconnected only after all other steps are complete and before the fuse is installed.
You must remove the cargo netting and floor board to expose the spare tire. Then locate the two threaded cargo net hooks on the threshold at the rear of the trunk and remove them. Pull the threshold at the bottom towards the front of the vehicle and lift up to release it. Repeat on the other side. Once both sides are loose, lift the threshold straight up and set it aside.
1. Remove the removable access panel in the trunk felt liner on the driver side to reveal the taillight connectors. Repeat on the passenger side. 2. Locate the vehicle's taillight wiring connectors. 3. Separate the connectors from the taillight housing, taking care not to damage the locking tabs. 4. Insert the custom wiring end with the yellow wire between the separated connectors on the driver side. Make sure the connectors are fully inserted with locking tabs in place. 5. Route the harness down between the driver side of the vehicle and the felt liner. Route the green wire along the rear of the vehicle to the passenger side, sliding it between the felt liner. 6. Install the green wire between the separated passenger-side taillight connectors. 7. Secure any loose wires with the provided cable ties.
Pull back the felt liner on the driver side and adhere the black converter box to the vehicle using the provided double-sided tape. You may need to remove the threaded cargo hook to make room. The converter box should be mounted in a location where it is secure and protected from moisture and damage.
You may need to drill a hole depending on available grounding points. First, locate an existing screw or bolt in the vehicle frame to use as a grounding point. If no suitable existing fastener is available, drill a 3/32" pilot hole. The area must be free from rust, dirt, and paint—use an abrasive pad or paper to remove rust and paint. Secure the white ground wire with its ring terminal to the existing fastener or with the provided ground screw. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
If you need to drill a grounding point, the pilot hole size is 3/32". The area must be free from rust, dirt, and paint before drilling.
The color-coded wires on the converter system represent the following trailer lighting functions: Green = Right turn signal; Red = Brake light; Yellow = Left turn signal; Brown = Tail/Running lights. These colors match the standard 4-flat trailer connector configuration.
Route the 12-gauge black power wire from the vehicle battery to the converter, taking care to avoid any pinch points and hot or rotating components. When passing the power wire through sheet metal, use an existing grommet, add a grommet, or use silicone to protect the power wire from sharp edges. Secure the power wire to the vehicle chassis using the provided cable ties. The power wire must be connected to the positive battery terminal using a ring terminal. A fuse holder with a 10-amp fuse must be installed in the power circuit, but the fuse should be installed only after all other steps are complete.
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. The fuse should be installed after all other installation steps are complete.
The converter system has the following electrical ratings: Signal circuits (left and right turn) = 3.0 amps per side; Tail/Running circuits = 6.0 amps total. Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower.
Follow these safety precautions: (1) Do not lay tools across the positive battery terminal (typically marked with red covers or a red '+' symbol), as this can cause a ground short resulting in sparks and/or electrical shocks. (2) Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. (3) When routing the power wire, avoid pinch points and hot or rotating components. (4) When passing the power wire through sheet metal, use an existing grommet, add a grommet, or use silicone to protect the wire from sharp edges. (5) Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower.
When in use, route the 4-flat connector through the center of the vehicle and out of the hatch, staying clear of the hatch's latching mechanism. When not in use, roll up the connector and store it in a convenient, out-of-the-way location. Install the provided 4-flat dust cover to help prevent corrosion.
Once the 12-volt power wire is connected to the harness, verify that the harness is functioning by attaching the battery and testing with a test light, 4-flat tester, or a functioning trailer. This test should be performed before the installation is considered complete.
After installation is complete and the system has been tested: (1) Reinstall all items removed during installation, including the trunk threshold, cargo netting, and floor board. (2) If the negative battery terminal was disconnected at the beginning, reconnect it. (3) Install the provided 4-flat dust cover to help prevent corrosion. (4) Secure any loose wires with the provided cable ties.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. This helps maintain proper function and prevent electrical issues.
The Curt 56529 is designed for SUVs and Vans. Confirm your specific vehicle make, model, and year using the Curt fitment database or contact Curt Manufacturing.
You need: panel trim removal tool, crimping tool, wire cutter, cutting tool, wire stripper, and fishwire.
Yes, you must disconnect the negative battery terminal before beginning installation and reconnect it only after all other steps are complete.
Drilling may be required only if no existing screw or bolt is available for the ground connection. If needed, drill a 3/32" pilot hole in a rust-free, clean area of the vehicle frame.
The battery connection must use a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating, and potential fire.
Use 12-gauge wire or larger for the power connection from the battery to the converter.
Verify the following: (1) Confirm that the 12-volt power wire is properly connected to the positive battery terminal using the ring terminal. (2) Check that the negative battery terminal is reconnected. (3) Verify that the 10-amp fuse is installed in the fuse holder. (4) Ensure that the white ground wire is securely attached to a clean, rust-free grounding point on the vehicle frame. (5) Check that all taillight connector connections are fully inserted with locking tabs in place. (6) Inspect all wires for visible damage or loose connections. (7) Test the system using a test light, 4-flat tester, or functioning trailer.
Sparks or electrical shocks can occur if tools are laid across the positive battery terminal (typically marked with red covers or a red '+' symbol), causing a ground short. To prevent this, keep tools away from the positive battery terminal during installation. Always disconnect the negative battery terminal before beginning work, and do not reconnect it until all other installation steps are complete.
Overheating and fire risk can result from exceeding the product rating or using a fuse larger than 10 amps. 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. Additionally, do not exceed the product's electrical ratings: 3.0 amps per side for signal circuits and 6.0 amps total for tail/running circuits. Do not exceed the tow vehicle lamp load rating either.
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