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Original price was $110.95. Current price is $93.99.You save $16.96 (15%)
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Vehicle battery connection required
Warranty: One-Year Limited Warranty
Finish: Blank
Electrical System Type: 3W
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 Toyota Corolla Cross (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 888-634-9494Rediscover "Us" Time | Tested. Proven. Safe. Towing Products
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2022 - 2025 | Toyota Corolla Cross | Installation Time: 30-60 minutes |
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Corolla Cross Trailer Connector Kit (Part #BKDK56479) is designed to fit the 2022-2025 Toyota Corolla Cross.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Corolla Cross Trailer Connector Kit (Part #BKDK56479) fits the following vehicles: 2022-2025 Toyota Corolla Cross. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Corolla Cross Trailer Connector Kit (Part #BKDK56479) fits 2022-2025 Toyota Corolla Cross models. The 2025 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 Toyota Corolla Cross Trailer Connector Kit (Part #BKDK56479) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
The Curt 56479 is a powered converter lead that converts your vehicle's factory taillight wiring to a 4-flat trailer connector. It allows you to connect a trailer with functioning lights to your passenger car without requiring permanent modifications to the vehicle's electrical system.
The Curt 56479 is designed for passenger cars with 12-volt negative ground electrical systems. The manual does not provide a specific vehicle compatibility list. Contact Curt Manufacturing or consult your vehicle's owner's manual to confirm compatibility with your specific make, model and year.
The manual specifies that the Curt 56479 is designed for passenger cars. The wiring location guide provided is for passenger cars only. Compatibility with trucks, SUVs or other body styles is not addressed in the manual. Contact the manufacturer to confirm fitment on your vehicle type.
You will need: ratchet, 10mm socket, socket extension, cutting tool, wire crimper, wire stripper, electrical tape, and a 3/32" drill bit (if drilling a ground hole). A fish wire or equivalent (cut-up wire hanger, stiff wire, rope or string) is also required to route wiring through blind holes.
The kit includes: a black converter box, yellow, green, white, red and brown wires, a 4-flat dust cover, double-sided tape, zip ties, a ground screw, a ring terminal, a fuse holder with 10-amp fuse, and butt connectors. The manual does not specify the exact quantity of each item.
Yes. Step 1 requires you to locate the vehicle battery in the engine compartment on the driver side and disconnect the negative battery terminal. Fasten this wire down and away from the battery while completing the installation. The battery must remain disconnected until Step 9, when you reconnect the negative terminal after all other work is complete.
The installation is rated as 'Easy'. However, the manual notes that installation difficulty levels are based on time and effort involved and may vary depending on the installer's level of expertise, the condition of the vehicle, and whether proper tools and equipment are available.
Open the rear hatch and locate the taillight fasteners on the driver side. Using a 10mm socket, remove the two bolts in the taillight trim. Then pull the taillight straight back. Locate the vehicle taillight wiring connectors, which will be similar to those on the custom wiring product. Separate the connectors from the taillight housing, taking care not to damage the locking tabs. Set the taillight aside in a safe place. Repeat this process on the passenger side.
Fish wiring is a technique to push or pull an electrical wire through a blind hole. Make sure the wire is long enough to stick out on the other side. Insert the fish wire through the blind hole and locate it on the other side. Use tape to secure the harness to the fish wire and pull back up. If the fish wire or harness gets hung up, you may need to push back down, wiggle it around, or twist the wire to loosen it. Fish wire can be anything from a cut-up wire hanger, stiff wire, rope or string depending on what is needed.
Route a fish wire down between the bumper cover in the further rear opening of the bumper cover and the body of the vehicle. Repeat on the other side. Connect the yellow wire to the fish wire and pull up to the factory harness connector. Insert the custom wiring end with the yellow wire between the separated connectors. Make sure the connectors are fully inserted with locking tabs in place.
Route the housing with the green wire above the bumper mount and along the back side of the bumper to the passenger side of the vehicle. Zip tie as needed along the bumper.
Not necessarily. On the driver side, locate a grounding point such as an existing screw or bolt in the frame of the vehicle. If no suitable existing fastener is available, you may drill a 3/32" pilot hole. The area should be free from rust, dirt, and paint—use an abrasive pad or paper to remove rust and paint. 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 ground hole, drill a 3/32" pilot hole. This hole is for securing the white ground wire with the ring terminal using 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. This is a critical safety step to prevent hitting hidden wiring, fuel lines, brake lines or other components.
Signal circuits: 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. Exceeding the product rating can cause loss of warranty, overheating and potential fire.
Use a 10mm socket to remove the two bolts in the taillight trim on each side of the vehicle.
Yellow = Left turn, Green = Right turn, Red = Brake, Brown = Taillight. These wires connect to the corresponding circuits in your vehicle's taillight system.
Route a 12-gauge wire or larger to the vehicle battery location, taking care to avoid any pinch points and hot or rotating components. Use an existing grommet, add a grommet, or use silicone to protect the power wire from sharp edges when passing through sheet metal. Connect the black wire to the positive battery terminal (+) using a ring terminal. The battery connection must be fuse-protected with a 10-amp maximum fuse. Install the fuse after all other steps are complete. Do not lay tools across the positive battery terminal, as this can cause a ground short, resulting in sparks and/or electrical shocks.
The maximum fuse rating is 10 amps. The battery connection must be fuse-protected with a 10-amp max 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.
Attach the ring terminal of the white ground wire to the vehicle body using an existing screw or bolt in the frame, or using the provided ground screw in a 3/32" hole if necessary. The area should be free from rust, dirt, and paint—use an abrasive pad or paper to clean it.
If using the converter as a powered module for a two-wire system, the red brake wire must be grounded.
Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. The product has the following electrical ratings: Signal circuits 3.0 amps per side, and Tail/Running circuits 6.0 amps total. Exceeding the product rating can cause loss of warranty, overheating and potential fire.
No. The Curt 56479 is designed for 12-volt negative ground systems only. It is not compatible with 24-volt systems or positive ground systems.
Once the custom harness is installed, verify that it is functioning by attaching the 4-flat connector to any trailer with functioning lights. You can also test for proper function using a test light or connecting a properly wired trailer.
Reinstall all items removed during installation. If the negative battery terminal was disconnected at the beginning, reconnect it. Install the provided 4-flat dust cover to help prevent corrosion. Verify that the harness is functioning by attaching the 4-flat to any trailer with functioning lights.
Install the 10-amp fuse after all other installation steps are complete. Do not install the fuse until the power wire is fully routed, connected and secured.
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 provided 4-flat dust cover helps prevent corrosion of the connector. Install it after completing the installation.
The Curt 56479 is designed for passenger cars with 12-volt negative ground electrical systems. The manual does not provide a specific vehicle compatibility list. Contact Curt Manufacturing or your vehicle manufacturer to confirm fitment.
Yes. Disconnect the negative battery terminal before beginning installation and keep it disconnected until Step 9, when you reconnect it after all other work is complete.
Drilling is not always required. You can use an existing screw or bolt in the vehicle frame for the ground connection. If no suitable fastener exists, drill a 3/32" pilot hole. Always check for hidden items before drilling.
The maximum fuse rating is 10 amps. The battery connection must be fuse-protected with a 10-amp max 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.
The Curt 56479 is designed for 12-volt negative ground systems only. It is not compatible with 24-volt systems or positive ground systems.
Periodically inspect all wires and connections to ensure there is no visible damage or loose connections.
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