
Ask a Question About This Product
Our in-house experts typically reply within one business day.
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!
On Sale Today
Original price was $110.95. Current price is $93.42.


Quick Ship
In stock and ready to ship — order now!
Shipping from Eau Claire, WIFREE SHIPPING
Estimated delivery Mon, Sep 7 - Wed, Sep 9
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
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: 2W
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
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 Flex (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 |
|---|---|---|
| 2009 - 2019 | Ford Flex | Installation Time: 30-60 minutes |
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Ford Flex Trailer Connector Kit (Part #BKDK56343) is designed to fit the 2009-2019 Ford Flex.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Ford Flex Trailer Connector Kit (Part #BKDK56343) fits 2009-2019 Ford Flex 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 Flex Trailer Connector Kit (Part #BKDK56343) fits the following vehicles: 2009-2019 Ford Flex. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Ford Flex Trailer Connector Kit (Part #BKDK56343) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56343 is designed for Ford Flex passenger cars. The harness connects at the driver and passenger side taillights inside the trunk.
The harness is rated for 3.0 amps per side for signal circuits and 6.0 amps total for tail/running circuits. 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.
You will need: a ratchet, 8mm socket, panel trim removal tool, wire stripper, wire crimper, and cutting tool. The manual also notes that a test light or properly wired trailer is needed to test the harness after installation.
The harness includes: a custom wiring harness with yellow and green wire ends, a white ground wire with ring terminal, a black converter box, a provided screw for grounding, double-sided tape for mounting the converter box, a 4-flat connector with dust cover, and cable ties for securing loose wires.
Open the tailgate. Starting on the driver side, remove the two fasteners securing the taillight. Gently pull the taillight rearward to remove it, taking care not to damage the alignment tabs. Repeat on the passenger side.
Behind each removed taillight, locate the vehicle taillight wiring harness connectors. Separate them from the taillight housing, taking care not to damage the locking tabs. Insert the custom wiring harness end (yellow wire for driver side, green wire for passenger side) between the separated connectors. Ensure the connectors are fully inserted with locking tabs in place.
You may use an existing screw with nut in the vehicle frame as a grounding point, or you can drill a 3/32" pilot hole for the provided screw. The grounding 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.
Mount the black converter box on a flat, clean surface that is out of the path of spray and debris from the rear wheels and road. Use the provided double-sided tape to adhere it. Mounting the box in a protected area is critical; failure to do so can cause loss of warranty, product failure, overheating and potential fire.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire.
When in use, route the 4-flat to the center of the vehicle and out of the trunk. When not in use, roll it up and store in a convenient, out-of-the-way location inside the trunk. Secure any loose wires with the provided cable ties.
Test for proper function by using a test light or connecting a properly wired trailer. All steps must be followed to ensure the wiring harness functions properly.
Reinstall all items removed during installation. Install the provided 4-flat dust cover to help prevent corrosion. Test the harness for proper function using a test light or a properly wired trailer.
The Curt 56343 is designed for Ford Flex passenger cars.
Ratchet, 8mm socket, panel trim removal tool, wire stripper, wire crimper, and cutting tool.
Drilling is optional. You can use an existing screw in the vehicle frame as a grounding point, or drill a 3/32" pilot hole for the provided screw.
10-amp maximum. Exceeding this can cause loss of warranty, overheating and potential fire.
Signal circuits: 3.0 amps per side. Tail/running circuits: 6.0 amps total. Do not exceed product rating or tow vehicle lamp load rating, whichever is lower.
Use a test light or connect a properly wired trailer to verify proper function.
No reviews have been added for this product.