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2019 - 2026 Acura RDX
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Always the correct part
We know our products
Quality Products
Free Shipping!
Warranty: One-Year Limited Warranty
Color: Black
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
CURT custom wiring connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection. They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model. Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring. Although this special socket is not equipped on every vehicle, a CURT custom wiring connector -- also called a T-connector -- utilizes the socket for simple, stress-free installation. Rather than requiring you to cut, splice and solder into your vehicle's wiring system, the custom wiring connector uses a single OEM-compatible plug and instantly provides a standard, universal vehicle-to-trailer wiring connection, typically in the form a 4-way flat. All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. This particular plug-in connector provides a 4-way flat socket and is designed to be a custom wiring option for certain years of the Acura RDX (to verify your vehicle compatibility, see application info). It comes with all necessary hardware to establish a solid connection. It also comes with a dust cover to keep the connector socket clean when not in use. To ensure long-lasting reliability, all CURT custom wiring connectors are thoroughly tested for optimal functionality. Stress is the last thing you should feel when towing a trailer -- whether you're hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot. At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it.
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
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2019 - 2026 | Acura RDX | — |
The CURT Custom Wiring Connector, 4-Way Flat Output, Select Acura RDX 56509 (Part #BKDK56509) fits 2019-2026 Acura RDX models. The 2026 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the CURT Custom Wiring Connector, 4-Way Flat Output, Select Acura RDX 56509 (Part #BKDK56509) is designed to fit the 2019-2026 Acura RDX.
The CURT Custom Wiring Connector, 4-Way Flat Output, Select Acura RDX 56509 (Part #BKDK56509) fits the following vehicles: 2019-2026 Acura RDX. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Connector, 4-Way Flat Output, Select Acura RDX 56509 (Part #BKDK56509) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The Curt 56509 is a powered converter lead wiring harness designed for SUVs and vans. It converts factory vehicle lighting signals to trailer lighting signals via a 4-flat connector, allowing you to tow a trailer with proper lighting control. The system includes a powered converter module that processes turn, brake, and taillight signals from your vehicle's electrical system.
The Curt 56509 is designed for SUVs and vans with 12-volt negative ground electrical systems. The manual does not list specific vehicle makes, models, or years. Contact Curt Manufacturing or consult a fitment database to confirm compatibility with your specific vehicle before purchasing.
No. The Curt 56509 is designed only for 12-volt negative ground systems. Using it on a 24-volt system or a positive ground system will damage the converter and void the warranty.
You will need: ratchet, 10mm socket, wire cutter, wire stripper, crimping tool, panel trim removal tool, large Phillips screwdriver, small Phillips screwdriver, small flathead screwdriver, and an extension. Proper tools will improve installation quality and reduce installation time.
The kit includes a powered converter module, a custom wiring harness with fuse holder, a 10-amp fuse, cable ties, a 4-flat dust cover, double-sided tape for mounting the converter, a ring terminal for the ground wire, a screw for ground attachment, and a white ground wire. The manual does not specify all individual hardware quantities.
Yes. You must disconnect the negative battery terminal before beginning installation. Secure this wire down and away from the battery during the installation process. Reconnect it only after all other installation steps are complete and before testing the system.
The installation difficulty is rated as Moderate. This rating is based on time and effort involved and may vary depending on installer expertise, vehicle condition, and availability of proper tools and equipment.
Yes. You must open the rear hatch and pull the levers on the passenger and driver-side rear walls to allow the seats to fold forward. Then remove the floorboard to gain access to the cargo tray, which must be removed to access the installation area.
The converter module is mounted to the factory electrical module located left of the white housing at the inside of the driver-side rear wheel well. Use the provided double-sided tape to secure the converter to the factory module.
Route the white ground wire down to the floor and under the side wall panel to the area under the cargo tray. Use a 10mm socket to loosen the factory ground bolt, install the custom wiring harness ground to this bolt, and tighten it securely.
Route the 4-flat connector with the center of the vehicle and out of the hatch to the trailer, staying clear of the hatch's latching mechanism. When not in use, roll up and store the connector in a convenient, out-of-the-way location. Secure any loose wires with the provided cable ties.
Drilling may be required only for the ground wire attachment. You may need to drill a 3/32" hole in the vehicle body if an existing screw hole is not available for the ring terminal of the white ground wire. Before drilling, check for miscellaneous items that may be behind or under the surface to avoid personal injury or property damage.
No permanent modifications are required. You will use a panel trim removal tool to loosen and remove interior trim panels (threshold, cargo tray, and side wall trim) to access the installation area, but these are reinstalled after installation is complete.
The battery connection must be fuse-protected with a 10-amp maximum fuse. The kit includes a fuse holder with a 10-amp fuse. Install the fuse after all other installation steps are complete. Exceeding this rating can cause loss of warranty, overheating, and potential fire.
Use 12 GA (12-gauge) wire or larger for the power wire routed to the vehicle battery. Route this wire carefully to avoid 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 wire from sharp edges.
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.
The converter output wires are: Green for right turn signal, Red for brake, Yellow for left turn signal, and Brown for taillight. These connect to the 4-flat trailer connector. The power lead uses a black wire for positive battery connection and a white wire for ground.
Route the 12 GA black power wire to the vehicle battery location, avoiding pinch points and hot or rotating components. Use a ring terminal to connect the black wire to the positive (+) battery terminal. Disconnect the negative battery terminal before making this connection. Install the 10-amp fuse in the fuse holder after all other steps are complete.
Attach the ring terminal of the white ground wire to the vehicle body using the screw provided. If necessary, drill a 3/32" hole for the screw. Before drilling, check for items behind or under the surface. The ground wire should be routed down to the floor and under the side wall panel to the area under the cargo tray, where it connects to the factory ground bolt.
Locate the white housing at the inside of the driver-side rear wheel well. Install the fuse into the custom harness and plug the harness into this white housing. This connects the converter to the vehicle's factory lighting signals.
Disconnect the negative battery terminal before beginning installation. Do not lay tools across the positive battery terminal (typically marked with red covers or a '+' symbol), as this can cause a short circuit, sparks, and electrical shock. Before drilling, check for miscellaneous items behind or under surfaces to avoid personal injury or property damage. Route the power wire carefully to avoid pinch points and hot or rotating components. Secure the power wire to the vehicle chassis using the provided cable ties.
The maximum fuse rating is 10 amps. Exceeding this rating can cause loss of warranty, overheating, and potential fire. The battery connection must be fuse-protected with a 10-amp maximum fuse to protect the vehicle's electrical system and prevent damage to the converter.
After installation is complete, test for proper function by using a test light or by connecting a properly wired trailer. Verify that all lighting signals (turn signals, brake lights, and taillights) function correctly through the 4-flat connector.
Reinstall all items removed during installation, including the cargo tray, threshold, trim panels, and floorboard. Reconnect the negative battery terminal if it was disconnected at the beginning. 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. The manual does not specify inspection intervals beyond 'periodic.' Check the vehicle owner's manual or contact the vehicle manufacturer for more information on recommended maintenance schedules.
The Curt 56509 is designed for SUVs and vans with 12-volt negative ground electrical systems. Confirm compatibility with your specific vehicle make, model, and year using a fitment database or by contacting Curt Manufacturing before purchasing.
Yes, you must disconnect the negative battery terminal before installation and reconnect it only after all other steps are complete.
The battery connection must use a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating, and potential fire.
Use 12 GA (12-gauge) wire or larger for the power wire routed to the battery. Route it carefully to avoid pinch points and hot or rotating components.
The manual does not specify a maximum towing capacity. Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. Consult the vehicle owner's manual or contact the vehicle manufacturer for towing capacity information.
Verify that the negative battery terminal is reconnected after installation. Check that the 10-amp fuse is installed in the fuse holder and is not blown. Confirm that the black power wire is securely connected to the positive (+) battery terminal using the ring terminal. Verify that the white ground wire is securely attached to the vehicle body and that the factory ground bolt is tight. If the fuse is blown, do not reinstall it until the cause of the overload is identified and corrected.
Verify that the custom harness is fully plugged into the white housing at the inside of the driver-side rear wheel well. Confirm that the 10-amp fuse is installed in the fuse holder and is not blown. Check that all wires are securely connected and that there is no visible damage. Test the system using a test light or by connecting a properly wired trailer. If lights still do not function, verify that the vehicle's factory lighting signals are working correctly.
Immediately disconnect the negative battery terminal. Do not reconnect the power wire. Check that no tools are laying across the positive battery terminal, as this can cause a short circuit. Verify that the black power wire is not damaged and that the ring terminal is properly crimped and securely connected to the positive (+) battery terminal. Do not proceed with installation until the cause is identified and corrected. If the issue persists, contact Curt Manufacturing for assistance.
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