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Original price was $72.95. Current price is $67.96.


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Warranty: One-Year Limited Warranty
Electrical System Type: 2W
Installation Difficulty: Advanced
Installation Time Exact (Minutes): 10
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 Ford Explorer (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
2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2011 - 2019 | Ford Explorer | Installation Time: 30-60 minutes |
| 2013 - 2018 | Ford Police Interceptor Utility | Installation Time: 30-60 minutes |
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Ford Explorer Trailer Connector Kit (Part #BKDK56172) fits the following vehicles: 2011-2019 Ford Explorer; 2013-2018 Ford Police Interceptor Utility. Always verify your specific year, make, and model before ordering.
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Ford Explorer Trailer Connector Kit (Part #BKDK56172) is designed to fit the 2011-2019 Ford Explorer.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Ford Explorer Trailer Connector Kit (Part #BKDK56172) fits 2011-2019 Ford Explorer models. The 2019 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 Ford Explorer Trailer Connector Kit (Part #BKDK56172) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56172 is designed for Ford Explorer pickup trucks. The harness mounts behind the driver side rear bumper (T3 location). For confirmation that your specific model year and configuration are compatible, check your vehicle owner's manual or contact the vehicle manufacturer, as the manual does not specify which model years are supported.
The Curt 56172 is a custom wiring harness that connects to your vehicle's taillight wiring to enable trailer lighting. It includes a 4-flat connector for towing applications and must be tested after installation using a test light or properly wired trailer to confirm proper function.
The manual lists no specific tools as required. However, you will need a drill with a 3/32" bit if a suitable grounding point with an existing screw and nut is not available on your vehicle frame. A test light or properly wired trailer is needed to test the harness after installation.
The harness includes a custom wiring connector, a white ground wire with ring terminal, a screw for grounding, cable ties for securing loose wires, and a 4-flat dust cover to prevent corrosion.
The vehicle taillight wiring connector is located behind the rear tire on the passenger side of the vehicle. This is where you will insert the custom wiring connector from the harness.
1. Locate the vehicle taillight wiring connector behind the rear tire on the passenger side. 2. Separate the connector carefully without damaging the locking tabs. 3. Insert the custom wiring connector between the separated vehicle connectors. 4. Ensure the connectors are fully inserted with locking tabs in place. The harness will then be ready for grounding and routing.
Locate a suitable grounding point near the taillight connector, such as an existing screw with nut in the vehicle frame. If no suitable point exists, drill a 3/32" pilot hole. Clean the area of rust, dirt and paint. Secure the white ground wire using the ring terminal and provided screw.
Drilling is required only if a suitable grounding point with an existing screw and nut is not available on your vehicle frame. If drilling is necessary, use a 3/32" pilot hole. Before drilling, check for hidden items behind or under any surface to avoid damage and personal injury.
Route the 4-flat connector to the center of the vehicle and out of the trunk. When not in use, roll up the harness and store it in a convenient, out-of-the-way location inside the trunk. Secure any loose wires with the provided cable ties.
The provided 4-flat dust cover helps prevent corrosion of the connector. Install it as the final step of the installation process.
Test the harness for proper function by using a test light or connecting a properly wired trailer. All installation steps must be followed to ensure the wiring harness functions properly before testing.
Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower. Exceeding the rating can cause loss of warranty, overheating and potential fire. The manual does not specify the product's amperage or wattage rating; check the product documentation or contact Curt Manufacturing for this specification.
Yes, the Curt 56172 is designed for Ford Explorer pickup trucks (T3 configuration). Confirm your specific model year with the vehicle manufacturer.
The harness includes a custom wiring connector, white ground wire with ring terminal, mounting screw, cable ties, and a 4-flat dust cover.
Drilling is required only if no existing screw and nut are available on the vehicle frame for grounding. If needed, drill a 3/32" pilot hole.
Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower. Exceeding the rating risks overheating and fire.
Test using a test light or by connecting a properly wired trailer to confirm proper function.
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