CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Camry 56544CURTOriginal price was $100.95. Current price is $87.99.In Stock
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2025 Toyota Camry
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Fuse holder
Battery connection wiring
Necessary wiring components
Dust cover
| Warranty | One-Year Limited |
| Connector Type | Male/Female |
| Terminal Style | Pin |
| System Type | 3-wire |
| Package Type | Packaged |
| Converter Style | Universal, Potted, Powered, Protected, PWM |
| Component Location | Vehicle/Trailer |
| Battery Required | Yes |
| Turn/Brake Circuit Capacity | 5.0 Amps |
| Tail Light Circuit Capacity | 7.5 Amps |
| Warranty | One-Year Limited |
| T-Connector Position | P1, P2 |
| Material Type | Thermoplastic Rubber |
| Vehicle Compatibility | Certain Toyota Camry models |
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 Camry (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 |
|---|---|---|
| 2025 | Toyota Camry | — |
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Camry 56540 (Part #BKDK56540) fits the following vehicles: 2025 Toyota Camry. Always verify your specific year, make, and model before ordering.
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Camry 56540 (Part #BKDK56540) is designed to fit the 2025 Toyota Camry.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Camry 56540 (Part #BKDK56540) fits 2025 Toyota Camry 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 Camry 56540 (Part #BKDK56540) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The Curt 56540 is a wiring converter designed for passenger cars that converts vehicle lighting signals into trailer lighting signals. It allows you to connect a trailer to your vehicle's electrical system. The converter processes turn signal, brake, and taillight circuits from your vehicle and outputs them through a 4-flat connector for trailer use.
The Curt 56540 is designed for passenger cars with 12-volt negative ground electrical systems. The manual does not specify which makes, models or years are compatible. Contact Curt Manufacturing or consult a fitment database to confirm compatibility with your specific vehicle before purchasing.
No. The Curt 56540 converter system is designed only for 12-volt negative ground electrical systems. It cannot be used on 24-volt systems or vehicles with positive ground systems.
You will need: ratchet, ratchet extension, 10mm socket, wire crimper, wire cutter, wire stripper, panel trim removal tool, and utility knife. These tools are required to remove interior panels, disconnect battery terminals, remove taillights, and prepare wiring connections.
The kit includes: a custom harness with green, yellow, and black wires; a black converter box; double-sided tape for mounting the converter; silicon sealant for sealing grommet cuts; cable ties for securing loose wires; a 4-flat dust cover; a ring terminal for battery connection; a screw for the ground wire; and a 15-amp fuse holder with fuse.
Yes. You must disconnect the negative battery terminal before beginning installation. Fasten the disconnected wire down and away from the battery while completing the installation. Reconnect the negative battery terminal only after all other installation steps are complete and before testing the system.
You must remove: the trunk floor covering and spare tire tool kit; four push fasteners from the threshold and two push fasteners from the trunk hinge area on each side; the cargo hooks on both sides; the trunk threshold; the trunk liner (which can be folded toward the rear seats); and both taillights after loosening their fasteners with a 10mm socket.
First, locate the grommet behind each taillight where the factory taillight wiring passes through from inside the cabin. Remove the grommet and cut a slit large enough to route the new custom wiring through. Push the grommet by hand into the taillight cavity and through into the trunk. Route the green wire (passenger side) and yellow wire (driver side) through the holes into the taillight cavities, attach them to the factory taillight wiring, install the wires into the cut grommets, and re-insert the grommets into their original holes.
Mount the black converter box on a flat, clean surface under the trunk liner or close to the battery using the provided double-sided tape. The manual emphasizes that failure to mount the box in a protected area can cause loss of warranty, product failure, overheating and potential fire. Choose a location that protects the box from moisture, heat sources, and physical damage.
After routing the green and yellow wires through the cut grommets and re-inserting the grommets into their holes, use the silicon sealant provided in the kit to seal the two cuts made to the grommets. This prevents moisture and debris from entering the vehicle.
The converter uses the following wire colors: Green = Right turn signal; Yellow = Left turn signal; Red = Brake signal; Brown = Taillight (running light). The custom harness green and yellow wires are routed to the passenger and driver side taillights respectively. The black converter box processes these signals and outputs them through the 4-flat connector.
Route a 12 GA (or larger) wire from the vehicle battery positive terminal to the converter, taking care to avoid pinch points and hot or rotating components. Use an existing grommet, add a new grommet, or apply silicone to protect the power wire from sharp edges when passing through sheet metal. Secure the power wire to the vehicle chassis using the provided cable ties. Use a ring terminal for the battery connection. Install the 15-amp fuse holder with fuse only after all other installation steps are complete.
The battery connection must be protected by a 15-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire. The fuse holder with 15-amp fuse is included in the kit and must be installed after all other installation steps are complete.
Signal circuits (turn signals) are rated at 5.0 amps per side. Tail/running circuits are rated at 7.5 amps total. Do not exceed these product ratings or your tow vehicle's lamp load rating, whichever is lower. Exceeding the product rating can cause loss of warranty, overheating and potential fire.
Attach the ring terminal of the white ground wire to the vehicle body using the screw provided in the kit. If necessary, drill a 3/32" hole to mount the screw. Choose a clean, bare metal surface on the vehicle chassis to ensure a good ground connection.
Disconnect the negative battery terminal before beginning installation and fasten the disconnected wire down and away from the battery. 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. Reconnect the negative battery terminal only after all other installation steps are complete.
Before drilling any holes, check for miscellaneous items that may be behind or under any surface. This prevents personal injury and property damage. When routing the power wire through sheet metal, use an existing grommet, add a new grommet, or apply silicone to protect the wire from sharp edges.
After connecting the 12-volt power wire 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 confirms that all signal circuits (turn signals, brake, and taillight) are working correctly before using the converter with a trailer.
When in use, route the 4-flat connector out of the trunk but away from the trunk latch to prevent damage. When not in use, roll up the connector and store it in a convenient, out-of-the-way location inside the trunk. Install the provided 4-flat dust cover to help prevent corrosion. Secure any loose wires with the provided cable ties.
Perform periodic inspection of all wires and connections to ensure there is no visible damage or loose connections. Check the 4-flat connector and dust cover regularly for corrosion. Inspect the converter box mounting to ensure the double-sided tape remains secure and the box has not shifted. Verify that cable ties securing the power wire remain tight and that the wire has not been pinched or damaged.
The Curt 56540 is designed for passenger cars with 12-volt negative ground electrical systems. Confirm your vehicle's compatibility with Curt Manufacturing or a fitment database before purchasing.
Yes, you must disconnect the negative battery terminal before installation and reconnect it only after all other steps are complete.
Drilling is not required for the main installation, but you may need to drill a 3/32" hole to mount the ground wire screw if a suitable existing hole is not available on the vehicle body.
The battery connection must use a 15-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire.
Do not lay tools across the positive battery terminal (red covers or '+' symbol) as this can cause shorts, sparks and electrical shocks. Do not exceed the product rating or your vehicle's lamp load rating. Mount the converter in a protected area to prevent overheating and fire.
First, verify that the negative battery terminal is properly reconnected. Test the converter using a test light, 4-flat tester, or a functioning trailer to confirm all signal circuits are working. Check that the green wire is properly attached to the factory taillight wiring on the passenger side and the yellow wire is properly attached on the driver side. Verify that the black converter box is securely mounted and that the 15-amp fuse is installed and not blown. Ensure the white ground wire ring terminal is securely attached to the vehicle body. If the converter still does not function, the issue may be with the factory taillight wiring connections or the converter itself.
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Original price was $167.95. Current price is $130.99.You save $36.96 (22%)
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