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Original price was $110.95. Current price is $93.99.


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Shipping from Eau Claire, WIFREE SHIPPING
Estimated delivery Wed, Sep 23 - Fri, Sep 25
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Ideal for trailers with surge brakes, common with boat trailers
Warranty: One-Year Limited Warranty
Electrical System Type: 3W
Output Type: 4-Way Flat
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 Focus hatchback (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 888-634-94941 compatible vehicles
| Year | Make & Model | Style | Notes |
|---|---|---|---|
| 2015 - 2018 | Ford Focus | Hatchback · 4-Door | Installation Time: 30-60 minutes |
Yes, the CURT 56273 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Ford Focus Hatchback (Part #BKDK56273) is designed to fit the 2015-2018 Ford Focus.
The CURT 56273 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Ford Focus Hatchback (Part #BKDK56273) fits 2015-2018 Ford Focus models. The 2018 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56273 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Ford Focus Hatchback (Part #BKDK56273) fits the following vehicles: 2015-2018 Ford Focus. Always verify your specific year, make, and model before ordering.
The CURT 56273 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Ford Focus Hatchback (Part #BKDK56273) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, CURT part 56273 is designed for Ford Focus hatchback. The manual identifies this as a passenger car application (P-series). Confirm your vehicle is a hatchback model, as the installation procedure is specific to this body style.
The CURT 56273 is a custom wiring harness that connects to your vehicle's taillight assemblies. It includes a 4-flat connector for trailer use and a converter box. The harness is routed through the trunk and connects to the vehicle's existing taillight wiring.
You will need: 10mm socket, 1/4" socket, T-20 Torx bit, ratchet, panel trim removal tool, crimping tool, wire cutters, and a cutting tool. You will also need sealant (not included by CURT) to seal the grommet after routing the wires through it.
Yes. Step 1 requires you to locate the vehicle battery on the driver side under the hood and disconnect the negative battery terminal before beginning any other work.
Open the tailgate and remove all trunk floor coverings and storage trays. Remove the rear scuff panel by removing push fasteners and pulling out at the bottom then up. On the driver side, remove two fasteners from the side trim panel, pull it back, then remove the taillight assembly fasteners. Gently pull the taillight rearward and out to access the connectors behind it.
Locate the grommet with wires running from inside the trunk to the taillight. Make a small slit in the grommet large enough to route the harness wires through. Route the wiring harness end with the yellow wire out through the grommet opening and through the slit. Insert the harness end with the yellow wire between the separated taillight connectors, ensuring the connectors are fully inserted with locking tabs in place. Seat the grommet with the harness wires passing through.
The manual requires you to use a sealant (not included) to seal the grommet where the wires pass through and where the grommet was cut. The specific type of sealant is not specified in the manual; consult the vehicle manufacturer or a sealant supplier for a product suitable for automotive trunk grommets.
Drilling may be required. Step 9 instructs you to locate a suitable grounding point near the connector, such as an existing screw with nut in the vehicle frame. If no existing screw is available, you must drill a 3/32" pilot hole for the provided screw. The manual warns to check for miscellaneous items hidden behind or under surfaces before drilling to avoid damage and personal injury.
The harness has two circuit ratings: signal circuits are rated at 3.0 amps per side, and tail/running circuits are rated at 6.0 amps total. Do not exceed these ratings or the tow vehicle lamp load rating, whichever is lower. Exceeding the product rating can cause loss of warranty, overheating, and potential fire.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Do not exceed this rating, as exceeding the product rating can cause loss of warranty, overheating, and potential fire.
The harness includes a yellow wire (routed to the driver side taillight connector), a green wire (routed to the passenger side taillight connector), a white ground wire (secured to a grounding point with a ring terminal and provided screw), and a black power wire (routed from the vehicle battery). The 4-flat connector is used for trailer connection.
Locate a flat spot inside the vehicle near the taillight and adhere the black converter box using the provided double-sided tape. The manual does not specify whether this is on the driver side or passenger side; consult the included CME-PCL-INS sheet or contact CURT for clarification on the exact location.
After completing Steps 1–8 on the driver side, route the CURT wiring harness end with the green wire to the passenger side behind the removed scuff panels. Repeat Steps 4–8 on the passenger side using the harness end with the green wire. This mirrors the driver side installation process.
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.
All steps must be followed to ensure the wiring harness functions properly. Once installed, test for proper function by using a test light or connecting a properly wired trailer. Reconnect the negative battery terminal before testing.
Reinstall all items removed during installation, including the taillight assemblies, side trim panels, rear scuff panel, and trunk floor coverings and storage trays. Reconnect the negative battery terminal. Install the provided 4-flat dust cover to help prevent corrosion.
Do not exceed the product rating (signal circuits 3.0 amps per side, tail/running circuits 6.0 amps total) or the tow vehicle lamp load rating, whichever is lower. Exceeding the product rating can cause loss of warranty, overheating, and potential fire. Additionally, check for miscellaneous items hidden behind or under surfaces before drilling to avoid damage and personal injury.
Yes, the CURT 56273 is designed for Ford Focus hatchback models.
You need: 10mm socket, 1/4" socket, T-20 Torx bit, ratchet, panel trim removal tool, crimping tool, wire cutters, cutting tool, and sealant (not included).
Yes, disconnect the negative battery terminal before starting installation.
Drilling may be required if no existing screw is available for the ground wire. You may need to drill a 3/32" pilot hole for the provided screw.
The battery connection must use a 10-amp maximum fuse. Do not exceed this rating.
Signal circuits: 3.0 amps per side. Tail/running circuits: 6.0 amps total. Do not exceed these ratings or the tow vehicle lamp load rating.
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