Our in-house experts typically reply within one business day.
CURT
Verify Fitment
Select your vehicle to confirm this part fits.
Always the correct part
We know our products
Quality Products
Free Shipping!
Always the correct part
We know our products
Quality Products
Free Shipping!
Vehicle battery connection required
Includes fuse holder, battery connection wiring and other necessary wiring components
Includes fuse holder, battery connection wiring and other necessary wiring components
Warranty: One-Year Limited Warranty
Electrical System Type: 3W
Output Type: 4-Way Flat
Tail Light Circuits: 3.0 Amps
Turn and Brake Circuits: 6.0 Amps
Installation Difficulty: Advanced
Installation Time Exact (Minutes): 60
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 Highlander (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 |
|---|---|---|
| 2020 - 2021 | Toyota Highlander | Installation Time: 60-90 minutes |
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Highlander Trailer Connector Kit (Part #BKDK56452) is designed to fit the 2020-2021 Toyota Highlander.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Highlander Trailer Connector Kit (Part #BKDK56452) fits the following vehicles: 2020-2021 Toyota Highlander. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Highlander Trailer Connector Kit (Part #BKDK56452) fits 2020-2021 Toyota Highlander models. The 2021 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 Highlander Trailer Connector Kit (Part #BKDK56452) Typical installation time is 60-90 minutes. Basic hand tools are typically all you need.
The Curt 56452 is a wiring converter designed for SUVs and vans. It converts vehicle lighting signals to trailer lighting signals, allowing 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 connection.
The Curt 56452 is designed for SUVs and vans with 12-volt negative ground electrical systems. The manual does not specify which vehicle models or years are compatible. Contact Curt Manufacturing or consult a fitment database with your vehicle's year, make and model to confirm compatibility before purchasing.
You will need: ratchet, 10mm socket, socket extension, panel trim removal tool, flathead screwdriver, cutting tool, wire crimper, wire stripper, fish wire (or equivalent such as a cut-up wire hanger or stiff wire), electrical tape, and a test light or 4-flat tester to verify function after installation. Proper tools will improve installation quality and reduce time required.
The kit includes: a black converter box, a white ground wire with ring terminal, yellow and green signal wires, a 4-flat connector with dust cover, double-sided tape for mounting the converter box, cable ties for securing wires, a screw for the ground connection, and a fuse holder with 10-amp maximum fuse. The fuse must be installed after all other installation steps are complete.
Yes. Step 1 requires you to locate the vehicle's 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 all wiring is complete and tested.
The installation is rated as 'Easy' based on time and effort involved. However, the difficulty level may vary depending on your expertise, the condition of your vehicle, and whether you have proper tools and equipment. All steps must be followed to ensure the product functions properly.
Mount the black converter box on a flat spot inside the vehicle near the taillight using the provided double-sided tape. The area should be clean and dry to ensure the tape adheres properly. The converter should be positioned so that the wires can reach the taillight connectors and the power wire can be routed to the battery.
On the driver side, route fish wire down between the body and bumper cover. From under the vehicle, attach the fish wire to the housing with the yellow wire, then pull it back up and connect to the factory harness. Repeat on the passenger side with the green wire. Ensure all connectors are fully inserted with locking tabs in place. The yellow wire handles left turn signals and the green wire handles right turn signals.
Fish wire is a tool used to push or pull an electrical wire through a blind hole or cavity. It can be a cut-up wire hanger, stiff wire, rope or string. Insert the fish wire through the blind hole, locate it on the other side, use tape to secure the harness to the fish wire, then pull back up. If the wire gets hung up, you may need to push back down, wiggle it around, or twist it to loosen it. The manual provides fish wire as a tool you must supply yourself.
Open the vehicle hatch. Use a small flathead screwdriver to remove the taillight trim cover. Use a 10mm socket to remove the two bolts securing the taillight and one bolt securing the bumper cover. Remove the taillights by pulling straight rearward. Separate the three connectors from the taillight housing, taking care not to damage the locking tabs. Pay attention to connector locations, as two connectors are identical and could be reinstalled incorrectly.
Use a panel trim removal tool to loosen the bumper cover from the vehicle body. Pull the bumper cover back, then use a 10mm socket to remove the fastener securing the bumper mount. Once the bolt is loose, the bumper cover mount can be removed. Repeat this process on both the driver and passenger sides.
You should first locate a suitable grounding point near the connector, such as an existing screw with nut in the vehicle frame. If no existing point is available, you may drill a 3/32" pilot hole for the provided screw. The area must be free of rust, dirt 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 hole for the ground wire, drill a 3/32" pilot hole. This hole is for the provided screw that secures the white ground wire ring terminal to the vehicle body. Before drilling, check for miscellaneous items hidden behind or under any surface to avoid damage and personal injury.
When passing the power wire through sheet metal, use an existing grommet, add a grommet, or use silicone to protect the power wire from sharp edges. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
Signal circuits are rated at 3.0 amps per side. Tail and running circuits are rated at 6.0 amps total. The battery connection must be fuse-protected with a 10-amp maximum fuse. 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 securing the taillight and one bolt securing the bumper cover. You will also need a 10mm socket to remove the fastener securing the bumper mount.
Yellow wire = Left turn signal. Green wire = Right turn signal. Red wire = Brake signal. Brown wire = Taillight/running light. White wire = Ground. Black wire = Power (12-volt positive from battery). These colors connect to the 4-flat trailer connector and correspond to standard trailer lighting circuits.
Route 12-gauge wire or larger from the vehicle battery to the converter, taking care to avoid pinch points and hot or rotating components. Use a ring terminal for the battery connection. Connect the black power wire to the positive battery (+) terminal. Secure the power wire to the vehicle chassis using the provided cable ties. When passing through sheet metal, use an existing grommet, add a grommet, or use silicone to protect from sharp edges. Install the fuse holder with 10-amp maximum fuse after all other steps are complete.
Use 12-gauge wire or larger for the power connection from the vehicle battery to the converter. The manual specifies '12 GA wire or larger' on the Powered Converter Lead Instruction Sheet.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Do not exceed 10 amps. The fuse holder is included with the kit and must be installed after all other installation steps are complete. Exceeding the 10-amp rating can cause loss of warranty, overheating and potential fire.
Route the 4-flat connector to the trailer hitch and mount it in an easy-to-access location. Secure any loose wires with the provided cable ties. Install the provided 4-flat dust cover to help prevent corrosion.
Route the yellow wire (left turn) down between the body and bumper cover on the driver side. Route the green wire (right turn) down between the body and bumper cover on the passenger side. Route the green wire above the bumper supports. Secure any loose wires with the provided cable ties to prevent damage and ensure clean routing.
The converter system is designed for use only on 12-volt negative ground electrical systems. If your vehicle has a different electrical system configuration, the product will not function properly. Check your vehicle owner's manual or contact the vehicle manufacturer to confirm your system type.
Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. The product is rated for 3.0 amps per side on signal circuits and 6.0 amps total on tail and running circuits. Exceeding these ratings can cause loss of warranty, overheating and potential fire. Check your vehicle owner's manual for your vehicle's lamp load rating.
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. Test all circuits: left turn, right turn, brake, and taillight. All steps must be followed to ensure the product functions properly before using with a trailer.
After installation, verify all connectors are fully inserted with locking tabs in place. Test the converter using a test light, 4-flat tester, or functioning trailer to confirm all circuits work: left turn (yellow), right turn (green), brake (red), and taillight (brown). Reinstall all items removed during installation. Reconnect the negative battery terminal. Install the provided 4-flat dust cover to prevent corrosion.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. Check the 4-flat connector dust cover to ensure it remains in place to prevent corrosion. Inspect cable ties to ensure wires remain secure and properly routed.
The Curt 56452 is designed for SUVs and vans with 12-volt negative ground electrical systems. Confirm your vehicle's compatibility with Curt Manufacturing or a fitment database before purchasing.
Drilling is optional. You may use an existing ground point on the vehicle frame, or drill a 3/32" pilot hole if needed. Before drilling, check for hidden items behind surfaces to avoid damage.
The converter requires a 12-volt negative ground electrical system. Check your vehicle owner's manual to confirm your system type.
If the fish wire or harness gets hung up on something during routing, you may need to push back down, wiggle it around, or twist the wire to loosen it from what it is caught on. The manual notes this is a common occurrence and provides these techniques to resolve it without damaging the wire.
First, verify that all connectors are fully inserted with locking tabs in place. Check that the yellow wire (left turn) and green wire (right turn) are properly connected to the factory harness. Verify the white ground wire is securely attached to a clean, rust-free grounding point. Confirm the black power wire is connected to the positive battery terminal with a ring terminal and that the 10-amp fuse is installed. Test each circuit (left turn, right turn, brake, taillight) using a test light or 4-flat tester. If still not functioning, check that the negative battery terminal is reconnected.
On Sale Today
Original price was $120.95. Current price is $100.99.You save $19.96 (17%)
Free Shipping
Ships free on all orders
Authorized Dealer
Quick Ship
In stock and ready to ship — order now!
Shipping from Eau Claire, WIFREE SHIPPING
Estimated delivery Fri, Aug 14 - Sun, Aug 16
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
Total for 4 items:
$176.94$196.90
No reviews have been added for this product.