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Warranty: One-Year Limited Warranty
Installation Difficulty: Novice
Installation Time Exact (Minutes): 5
A CURT Quick Plug brake controller wiring adapter is one of the fastest and easiest ways to plug your brake controller into your vehicle. It requires no cutting or splicing! Just insert the vehicle-specific plug end into the OEM vehicle?s factory brake controller socket. The other end plugs into your CURT trailer brake controller. Quick Plug harnesses are available for a variety of vehicles and are unique for each vehicle application to provide the easiest possible installation. This particular brake controller harness fits certain years of the Toyota Tacoma and Tundra (see application info to verify fitment). CURT Quick Plug harnesses are compatible with most CURT brake controls and can be used as a replacement or for a new control unit installation. They're also great for towing all types of trailers with electric brakes. For versatile mounting of your trailer brake controller this Quick Plug wire harness measures two feet long. It also features a slit loom sleeve to keep the wires protected against crushing and abrasions. CURT Quick Plug wire plug-in adapters are made with 12-gauge wires for a reliable connection and braking, and come with zip ties to keep the harness contained and out of sight.

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
2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2016 - 2024 | Toyota Tacoma | Installation Location: BH4 Installation Time: 30-60 minutes |
| 2015 - 2018 | Toyota Tundra | Installation Location: BH4 Installation Time: 30-60 minutes |
The CURT Trailer Brake Controller Harness, Select Toyota Tacoma, Tundra (Packaged) Trailer Brake Control Harness (Part #BKDK51456) fits the following vehicles: 2016-2024 Toyota Tacoma; 2015-2018 Toyota Tundra. Always verify your specific year, make, and model before ordering.
Yes, the CURT Trailer Brake Controller Harness, Select Toyota Tacoma, Tundra (Packaged) Trailer Brake Control Harness (Part #BKDK51456) is designed to fit the 2016-2024 Toyota Tacoma.
The CURT Trailer Brake Controller Harness, Select Toyota Tacoma, Tundra (Packaged) Trailer Brake Control Harness (Part #BKDK51456) fits 2016-2024 Toyota Tacoma models. The 2024 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT Trailer Brake Controller Harness, Select Toyota Tacoma, Tundra (Packaged) Trailer Brake Control Harness (Part #BKDK51456) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, part 51456 is designed for Toyota Tundra. The harness connects at wiring location BH4, which is located behind the storage pocket above the ashtray. Installation requires disconnecting the battery, removing interior panels, and connecting the harness to the vehicle's white connector behind the three-button panel.
Yes, part 51456 is designed for Toyota Tacoma. The harness connects at wiring location BH3, which is located in the junction box left of the steering column. Installation requires disconnecting the battery, removing the driver-side door trim panel and kick panel, and connecting the harness to the vehicle's white connector on the back side of the vehicle harness.
Part 51456 is a custom brake control harness that connects a brake control unit to your vehicle's electrical system. It provides the wiring interface between the brake control and the vehicle's factory connectors. The harness must be completed with brake control unit mounting and testing per the brake control user manual.
You will need a flathead screwdriver and a panel trim removal tool. Cable ties are recommended to secure the harness but are not provided with the product.
Yes, you must disconnect the negative battery terminal before beginning installation. Locate the battery in the engine compartment on the driver side, disconnect the negative terminal, and fasten this wire down and away from the battery while completing the installation.
1. Disconnect the negative battery terminal and fasten it away from the battery. 2. Using a panel trim removal tool, remove the panel below the three-button panel by pulling outward at the top left corner near the steering wheel, releasing tabs one at a time. 3. Remove the three-button panel using the same method. 4. Locate the white connector behind the three-button panel and insert the harness connector, ensuring locking tabs are fully in place. 5. Route the harness along the back of the dash and out the bottom to the brake control unit. 6. Insert the harness's black connector into the brake control's quick plug connector. 7. Secure the harness with cable ties, avoiding pinch points. 8. Reinstall the panels and reconnect the battery. 9. Complete installation per the brake control user manual.
1. Disconnect the negative battery terminal and fasten it away from the battery. 2. Using a panel trim removal tool, remove the driver-side door trim panel by pulling straight up. 3. Using a flathead screwdriver, loosen the nut securing the kick panel. Using a panel trim removal tool, loosen the kick panel push fasteners and remove straight back into the door opening. 4. Locate the white connector on the back side of the vehicle harness and insert the harness connector, ensuring locking tabs are fully in place. 5. Reinstall the panels and reconnect the battery. 6. Complete installation per the brake control user manual.
The white connector on the custom brake control harness connects to the vehicle's white connector. On Tundra, this connector is located behind the three-button panel. On Tacoma, it is located on the back side of the vehicle harness in the junction box area. The connectors must be fully inserted with locking tabs in place.
The black connector on the custom brake control harness connects to the brake control unit's quick plug connector. This connection is made after routing the harness along the back of the dash and out the bottom to the brake control unit.
Route the brake control harness along the back of the dash and out the bottom to the brake control unit. Secure the harness with cable ties, avoiding any pinch points. Cable ties are not provided with the product.
Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower. The specific product rating is not stated in the installation manual. Consult the brake control user manual or contact Curt Manufacturing for the exact rating.
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 inspection intervals.
Once installed, test for proper function by using a test light or connecting a properly wired trailer. Detailed test procedures are provided in the brake control user manual, which must be consulted to complete the installation.
Yes. On Tundra, you must remove both the panel below the three-button panel and the three-button panel itself to access the white connector behind it. Use a panel trim removal tool, starting at the top left corner near the steering wheel and pulling outward to release the tabs one at a time.
Yes. On Tacoma, you must remove the driver-side door trim panel and the kick panel to access the white connector. Use a flathead screwdriver to loosen the nut securing the kick panel, then use a panel trim removal tool to loosen the push fasteners and remove the panel straight back into the door opening.
Part 51456 is designed for Toyota Tundra and Toyota Tacoma. Verify your vehicle model before purchasing.
Yes, disconnect the negative battery terminal before starting installation.
Part 51456 has a white connector that plugs into the vehicle's white connector, and a black connector that plugs into the brake control unit's quick plug connector.
Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower. Consult the brake control user manual or Curt Manufacturing for the specific rating.





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