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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 Nissan Leaf (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®.'
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1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2011 - 2025 | Nissan LEAF | Installation Time: 30-60 minutes |
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Nissan Leaf Trailer Connector Kit (Part #BKDK56227) fits 2011-2025 Nissan LEAF models. The 2025 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Nissan Leaf Trailer Connector Kit (Part #BKDK56227) is designed to fit the 2011-2025 Nissan LEAF.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Nissan Leaf Trailer Connector Kit (Part #BKDK56227) fits the following vehicles: 2011-2025 Nissan LEAF. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Nissan Leaf Trailer Connector Kit (Part #BKDK56227) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56227 is designed for the Nissan Leaf. It is a custom wiring harness that connects to the vehicle's taillight wiring harness connectors located inside the trunk behind the taillight.
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. You must not exceed the product rating or the tow vehicle lamp load rating, whichever is lower.
Yes, you must disconnect the negative battery terminal before beginning installation. This is a required safety step performed in Step 2 of the installation process.
You will need: a 10mm socket, a ratchet, a panel trim removal tool, and a flat blade screwdriver. These tools are required to remove trunk components and access the taillight connectors.
You must remove: all trunk floor coverings, the storage bag (by removing 10mm bolts from the mounting bracket), the rear scuff panel, the sound system box (by removing 10mm bolts and disconnecting its electrical connector), and the cargo tie down fastener from the passenger side trim panel.
Locate the vehicle's taillight wiring harness connectors inside the trunk behind the taillight (on both driver and passenger sides). Separate the connectors from the taillight housing, 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, ensuring they are fully inserted with locking tabs in place.
Drilling may be required only for the ground wire installation. You should first locate an existing screw with nut in the vehicle's frame as a grounding point. If no suitable existing screw is available, you may drill a 3/32" pilot hole for the provided screw. Before drilling, check for hidden items behind or under any surface to avoid damage and personal injury.
If an existing screw is not available, drill a 3/32" pilot hole for the provided ground screw. The grounding area should be free of rust, dirt and paint before securing the white ground wire using the ring terminal and provided screw.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this fuse rating can cause loss of warranty, overheating and potential fire. Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower.
Locate a flat spot inside the vehicle near the taillight and adhere the black converter box using the double-sided tape provided. When not in use, the 4-flat connector should be rolled up and stored in a convenient, out-of-the-way location.
Route the black power wire from the vehicle's battery as shown on the included CME-PCL-INS sheet. This sheet provides specific routing instructions for your vehicle.
Secure any loose wires with the provided cable ties. This helps organize the installation and prevents wires from becoming damaged or caught.
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 will function properly.
Reinstall all items removed during installation, reconnect the negative battery terminal, and install the provided 4-flat dust cover to help prevent corrosion.
You must not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. Check your vehicle owner's manual or contact the vehicle manufacturer for your specific tow vehicle lamp load rating.
The T-connector on the driver side has a yellow wire, and the T-connector on the passenger side has a green wire. Each is inserted between the separated taillight connectors on their respective sides.
The ground wire is white. It is secured using a ring terminal and provided screw to a suitable grounding point near the connector.
The power wire is black. It is routed from the vehicle's battery as shown on the included CME-PCL-INS sheet.
Yes, the Curt 56227 is designed specifically for the Nissan Leaf.
You need a 10mm socket, ratchet, panel trim removal tool, and flat blade screwdriver.
Yes, disconnect the negative battery terminal before starting installation.
Drilling may be required only for the ground wire if no existing screw is available; you would drill a 3/32" pilot hole.
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, whichever is lower.
Test for proper function using a test light or by connecting a properly wired trailer.
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