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Warranty: One-Year Limited Warranty
Finish: Blank
Electrical System Type: 3W
Output Type: 4-Way Flat
Tail Light Circuits: 7.5 Amps
Turn and Brake Circuits: 5.0 Amps
Installation Difficulty: Easy
Installation Time Exact (Minutes): 30
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 Toyota Highlander, Grand Highlander, Lexus TX350, TX550h, and TX55h+ (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 Limited
5 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2024 - 2026 | Lexus TX350 | Installation Time: 30-60 minutes |
| 2024 - 2026 | Lexus TX500h | Installation Time: 30-60 minutes |
| 2024 - 2026 | Lexus TX550h+ | Installation Time: 30-60 minutes |
| 2024 - 2026 | Toyota Grand Highlander | Installation Time: 30-60 minutes |
| 2020 - 2026 | Toyota Highlander | Installation Time: 30-60 minutes |
The CURT Custom Wiring, 4-Way Flat, Select Toyota Grand, Highlander, Lexus TX Series (Part #BKDK56524) fits 2024-2026 Lexus TX350 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, 4-Way Flat, Select Toyota Grand, Highlander, Lexus TX Series (Part #BKDK56524) fits the following vehicles: 2024-2026 Lexus TX350; 2024-2026 Lexus TX500h; 2024-2026 Lexus TX550h+; 2024-2026 Toyota Grand Highlander; 2020-2026 Toyota Highlander. Always verify your specific year, make, and model before ordering.
Yes, the CURT Custom Wiring, 4-Way Flat, Select Toyota Grand, Highlander, Lexus TX Series (Part #BKDK56524) is designed to fit the 2024-2026 Lexus TX350.
The CURT Custom Wiring, 4-Way Flat, Select Toyota Grand, Highlander, Lexus TX Series (Part #BKDK56524) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Part 56524 is designed for SUVs and Vans (S-series vehicles). The manual does not specify individual makes, models or model years. Contact Curt Manufacturing or consult a fitment database with your vehicle's year, make and model to confirm compatibility before purchase.
Part 56524 is a wiring harness that provides trailer lighting connections for SUVs and vans. It includes signal circuits rated at 5.0 amps per side and tail/running circuits rated at 7.5 amps total. The harness connects to a 4-flat trailer connector and includes a converter module with fuse protection.
You will need: a ratchet, a 10mm socket, a socket extension, a panel trim removal tool, and a cutting tool. A small flathead screwdriver is also required to remove the fastener trim cover. Proper tools will improve installation quality and reduce installation time.
The harness includes: a large white connector harness with black converter module, a fuse holder with fuse, a white ground wire with ring terminal, double-sided tape for mounting, a 4-flat connector for the trailer, and a dust cover for the jumper plug. The manual does not specify whether all fasteners and connectors are pre-assembled or require additional hardware.
The harness is located behind the driver-side rear access panel (location S3 on the wiring location guide). Specifically, you access it by opening the driver-side rear door, folding the second-row seat forward, and removing the third-row cup holder to reach the harness with the white connector just above where the cup holder was removed.
Open the driver-side rear door (second-row seats). Fold the second-row rear seat forward. Use a panel trim tool to remove the third-row seating cup holder. Just above the removed cup holder, remove the fastener trim cover with a small flathead screwdriver, then remove the 10mm fastener with a 10mm socket. Pull back the side trim just below the second-row seat belt. Separate the wall housing just below the glass. The harness with a white connector is located just above where the cup holder was removed.
Mount the converter module (part of the large white connector harness with black converter module) below the armrest using the provided double-sided tape. The grounding point is located just behind the seat belt strap, where you will secure the white ground wire using the ring terminal and the existing 10mm bolt.
Locate the grounding point just behind the seat belt strap. Remove the existing 10mm bolt. Secure the white ground wire to the bolt using the ring terminal, then reinstall the bolt. This provides the ground connection for the converter module.
The jumper plug is located at the driver-side rear of the bumper. Remove the dust cover and install the harness with the 4-flat connector to the jumper plug connector.
Route the 4-flat connector to the center of the vehicle next to the hitch and secure it in place with zip ties. This routing protects the connector and keeps it organized.
The battery connection must be fuse-protected with a maximum 15-amp fuse. The manual does not specify the exact fuse size required; contact Curt Manufacturing or consult your vehicle's electrical specifications to determine the correct fuse amperage for your application.
Signal circuits are rated at 5.0 amps per side. Tail and running circuits are rated at 7.5 amps total. Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower. Exceeding the product rating can cause loss of warranty, overheating and potential fire.
The manual does not specify a maximum tow load. It states: do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower. Check your vehicle owner's manual or contact the vehicle manufacturer for your vehicle's lamp load rating and towing capacity.
Exceeding the product rating can cause loss of warranty, overheating and potential fire. The battery connection must be fuse-protected with a 15-amp maximum fuse. Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower.
After all installation steps are complete, attach the battery and test the harness using a test light, 4-flat tester, or a functioning trailer. This verifies that the harness is functioning properly before you reinstall all items removed during installation.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. The manual does not specify the inspection interval; consult your vehicle owner's manual or Curt Manufacturing for recommended maintenance schedules.
Part 56524 is designed for SUVs and vans. Confirm your specific vehicle year, make and model with Curt Manufacturing or a fitment database before purchase.
The manual does not mention drilling. Installation involves removing trim panels, fasteners and accessing existing connectors. No drilling is described.
The battery connection must be fuse-protected with a maximum 15-amp fuse. The exact fuse size required is not specified; contact Curt Manufacturing for your application.
Signal circuits: 5.0 amps per side. Tail/running circuits: 7.5 amps total. Do not exceed the product rating or your vehicle's lamp load rating, whichever is lower.
Perform periodic inspection of all wires and connections to ensure no visible damage or loose connections. Inspection intervals are not specified in the manual.
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