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2010 - 2015 Lexus RX350
Confirmed to Fit
2010 - 2019 Lexus RX450h
Confirmed to Fit
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Plugs into vehicle tail light assembly to provide a 4-way flat socket
Installation Point(s): S4, S5
| Converter Type | Circuit Protected, Powered, Potted |
| Electrical Package Type | Packaged |
| Electrical System Type | 3W |
| Material | THERMOPLASTIC RUBBER |
| Tail Light Circuits | 6.0 Amps |
| T-Connector Location | S4,S5 |
| Turn and Brake Circuits | 3.0 Amps |
| Warranty | One-Year Limited Warranty |
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 Lexus RX Series (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
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4 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2010 - 2015 | Lexus RX350 | — |
| 2016 - 2022 | Lexus RX350 | VIN begins with 2 |
| 2010 - 2019 | Lexus RX450h | — |
| 2020 - 2022 | Lexus RX450h | VIN begins with 2 |
Yes, the CURT 56563 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Lexus RX Series (Part #BKDK56564) is designed to fit the 2010-2022 Lexus RX350.
The CURT 56563 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Lexus RX Series (Part #BKDK56564) fits 2010-2022 Lexus RX350 models. The 2022 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56563 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Lexus RX Series (Part #BKDK56564) fits the following vehicles: 2010-2022 Lexus RX350; 2010-2022 Lexus RX450h. Always verify your specific year, make, and model before ordering.
The CURT 56563 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Lexus RX Series (Part #BKDK56564) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
CURT 56564 is designed for SUVs and Vans with factory trailer towing harness connectors and 12-volt negative ground electrical systems. Your vehicle must have an existing factory trailer towing harness connector underneath the vehicle on the driver's side. If your vehicle does not have this connector, this product will not function. Contact CURT Product Support at 877-287-8634 to confirm compatibility with your specific make, model and year.
CURT 56564 is a powered converter lead and T-connector harness system that integrates a vehicle's factory trailer towing harness with a lighting module. It allows you to connect a trailer with functioning lights to your SUV or van. The system includes a white 10-pin towing connector, a 4-way flat connector for the trailer, a lighting module, a powered converter with battery connection, and mounting hardware.
You will need: a trim panel tool, wire cutters, a test light, and a multimeter. These tools are required to remove trim panels safely, cut and route wires, and verify proper electrical function after installation.
Yes. You must disconnect the negative battery cable from the driver's side of the engine compartment before beginning installation. Ensure the negative battery cable is isolated to protect it from creating an electrical system ground. Reconnect the negative battery terminal only after all other installation steps are complete (Step 8).
Read all instructions thoroughly before beginning. Proper tools will improve installation quality and reduce time required. All steps must be followed to ensure the product functions properly. The installation is rated as Difficult, so ensure you have adequate time, proper tools, and understanding of the procedure before starting.
Mount the lighting module on a flat, clean surface either behind the threshold or in the lower passenger's side trim panel area. Use the provided double-sided tape or zip ties to secure it in an out-of-the-way location where it will not interfere with vehicle operation or occupants.
Insert the lighting module's white 10-pin towing connector into the vehicle's mating harness (located behind the passenger-side trim panel after removing the side panel mounting pins). This connector links the module to the factory trailer towing system.
The factory trailer towing harness connector is located underneath the vehicle on the driver's side. It has a protective plug that must be carefully removed before inserting the trailer tow harness. Take care not to damage the connector mounting tabs when removing the protective plug.
Place the protective connector cap in the glove box or console for storage. Do not discard it. You may need it in the future if the connector is disconnected.
Route the 4-way flat connector along the rear bumper fascia and over to the center of the vehicle. Secure the 4-way connector into a bracket (not included with the product). Secure any loose wires with the provided cable ties to prevent movement and damage.
Drilling may be required only if you need to ground the white ground wire from the powered converter to the vehicle body. A 3/32" hole may be drilled if an existing mounting point is not available. Before drilling, check for miscellaneous items that may be behind or under any surface to avoid personal injury or property damage.
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. Install the fuse after all other installation steps are complete.
Signal circuits are rated at 3.0 amps per side. Tail and running circuits are rated at 6.0 amps total. Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower.
Use 12 GA (gauge) wire or larger for the power connection from the converter to the vehicle battery. Route this wire to the vehicle battery location, taking care to avoid pinch points and hot or rotating components.
The powered converter uses the following wire colors: Green for right turn signal, Red for brake, Yellow for left turn signal, and Brown for taillight. If using the converter as a powered module for a two-wire system, the red brake wire must be grounded.
Route the 12 GA black power wire to the positive (+) battery terminal using a ring terminal. The negative battery cable must be disconnected before wiring the power wire. Use the ring terminal for the battery connection and secure it with the screw provided. Install the fuse holder with a 10-amp maximum fuse after all other steps are complete.
Attach the ring terminal of the white ground wire to the vehicle body using the screw provided. If an existing mounting point is not available, drill a 3/32" hole. Before drilling, check for miscellaneous items behind or under the surface to avoid injury or damage.
When passing the power wire through sheet metal, use an existing grommet, add a new grommet, or use silicone to protect the power wire from sharp edges. This prevents damage to the wire insulation and potential electrical hazards.
The provided 4-way dust cover helps prevent corrosion of the 4-way flat connector. Install it after reconnecting the negative battery terminal to protect the connector from moisture and environmental damage.
CURT 56564 is designed for use only on 12-volt negative ground electrical systems. Your vehicle must have a negative ground system for this product to function correctly.
Do not lay tools across the positive battery terminal (typically noted with red covers or a red '+' symbol), as this can cause a ground short leading to sparks and/or electrical shocks. Disconnect the negative battery cable before wiring the power wire. Ensure the negative battery cable is isolated to protect it from creating an electrical system ground, as grounding it to a metal item could damage the vehicle's electrical system.
After installation, verify that the harness is functioning by using a test light, 4-way tester, multimeter, or by attaching the 4-way flat connector to any trailer with functioning lights. This confirms that all electrical connections are correct and the system is ready for use.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. Regular maintenance helps prevent electrical failures and ensures safe trailer operation.
CURT 56564 fits SUVs and vans with factory trailer towing harness connectors and 12-volt negative ground systems. Your vehicle must have an existing factory trailer towing harness connector. Contact CURT at 877-287-8634 to confirm compatibility with your specific vehicle.
Yes, disconnect the negative battery cable before starting installation. Reconnect it only after all other steps are complete.
Drilling may be required only to ground the white ground wire to the vehicle body if an existing mounting point is not available. A 3/32" hole is drilled if necessary.
Use 12 GA (gauge) wire or larger for the power connection from the converter to the vehicle battery.
CURT 56564 is designed for 12-volt negative ground electrical systems only.
Ensure you have located the correct mating harness connector behind the passenger-side trim panel. The connector should be a white 10-pin type. If the connector does not fit, do not force it, as this can damage the connector tabs. Verify that the vehicle has a factory trailer towing system and that you are using the correct product for your vehicle. Contact CURT Product Support at 877-287-8634 for assistance.
Verify that the harness is functioning by using a test light, 4-way tester, multimeter, or by attaching the 4-way flat connector to a trailer with functioning lights. If the test light does not illuminate, check that: (1) the negative battery cable is properly reconnected, (2) the white 10-pin connector is fully seated in the vehicle's mating harness, (3) the factory trailer towing harness connector is properly inserted, (4) the 10-amp fuse is installed and not blown, and (5) all wire connections are secure. If the problem persists, contact CURT Product Support at 877-287-8634.
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