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Warranty: One-Year Limited Warranty
Electrical System Type: 3W
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 Volvo S60 and S60 Cross Country (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
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Volvo S60, Cross Country Trailer Connector Kit (Part #BKDK56224) is designed to fit the 2011-2020 Volvo S60.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Volvo S60, Cross Country Trailer Connector Kit (Part #BKDK56224) fits the following vehicles: 2011-2020 Volvo S60; 2016-2018 Volvo S60 Cross Country. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Volvo S60, Cross Country Trailer Connector Kit (Part #BKDK56224) fits 2011-2020 Volvo S60 models. The 2020 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 Volvo S60, Cross Country Trailer Connector Kit (Part #BKDK56224) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
The Curt 56224 is designed for Volvo S60, S60 long wheel base, and S60 (including S60L) with T5 trims only (4-cylinder turbo engines). If your vehicle matches these specifications, it will fit. For other engine types or model years not listed, contact the vehicle manufacturer or Curt for confirmation.
The Curt 56224 has a Signal Circuits rating of 3.0 amps per side and a Tail/Running Circuits rating of 6.0 amps total. The battery connection must be fuse-protected with a 10-amp maximum fuse. Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower, as exceeding it can cause loss of warranty, overheating and potential fire.
You will need a panel trim removal tool and a 10mm socket. The manual also indicates that you may need to drill a 3/32" pilot hole for a ground screw if a suitable existing screw is not available near the taillight connector.
Yes. Step 2 of the installation requires you to locate the vehicle's battery on the driver side under the hood and disconnect the negative battery terminal before proceeding with any other steps.
The vehicle's wiring harness connectors are located in the trunk behind the taillight housings. The driver-side connector is at position P3 (behind driver side taillight housing, inside of trunk) and the passenger-side connector is at position P4 (behind passenger side taillight housing, inside of trunk). You will need to remove the trunk floor coverings and rear scuff panel to access them.
Pull back the felt trunk liner behind each taillight to locate the vehicle's taillight wiring harness connectors. Separate the connectors carefully, taking care not to damage the locking tabs. Insert the T-connector end (yellow wire on driver side, green wire on passenger side) between the separated connectors. Make sure the connectors are fully inserted with locking tabs in place.
Locate a suitable grounding point near the connector, such as an existing screw with nut in the vehicle's frame. If no suitable point exists, drill a 3/32" pilot hole for the provided screw. The area must be free of rust, dirt and paint. Secure the white ground wire using the ring terminal and provided screw. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
Drilling may be required. Step 8 instructs you to locate a suitable existing grounding point (such as an existing screw with nut in the vehicle's frame). If no suitable point is available, you must drill a 3/32" pilot hole for the provided ground screw. Before drilling, check for miscellaneous items hidden behind or under any surface to avoid damage and personal injury.
When in use, route the 4-flat to the center of the vehicle. When not in use, roll it up and store in a convenient, out-of-the-way location. Secure any loose wires with the provided cable ties. Install the provided 4-flat dust cover to help prevent corrosion.
Locate a flat spot inside the vehicle near the taillight and adhere the black converter box using the double-sided tape provided.
After reinstalling all items removed during installation and reconnecting the negative battery terminal, 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.
First, remove the 10mm bolts and cargo tie downs located on each side of the rear scuff panel. Then remove the scuff panel by pulling out on the bottom and then up.
The battery connection must be fuse-protected with a 10-amp maximum. Exceeding this rating can cause loss of warranty, overheating and potential fire. Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower.
The Curt 56224 fits Volvo S60, S60 long wheel base, and S60 (including S60L) with T5 trims only (4-cylinder turbo engines).
You need a panel trim removal tool and a 10mm socket. A drill may be required if no suitable ground point exists.
Yes, disconnect the negative battery terminal before beginning installation.
Signal Circuits: 3.0 amps per side. Tail/Running Circuits: 6.0 amps total. Battery connection must use a 10-amp maximum fuse.
The battery connection must be fuse-protected with a 10-amp maximum. Exceeding this can cause loss of warranty, overheating and potential fire.
2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2011 - 2020 | Volvo S60 | Installation Time: 30-60 minutes |
| 2016 - 2018 | Volvo S60 Cross Country | Installation Time: 30-60 minutes |
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