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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: Advanced
Installation Time Exact (Minutes): 20
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 Versa sedan without LED taillights (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 | Notes |
|---|---|---|
| 2014 - 2018 | Nissan Versa | Installation Time: 30-60 minutes |
Yes, the CURT 56185 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Nissan Versa Sedan without LED Taillights (Part #BKDK56185) is designed to fit the 2014-2018 Nissan Versa.
The CURT 56185 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Nissan Versa Sedan without LED Taillights (Part #BKDK56185) fits 2014-2018 Nissan Versa models. The 2018 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56185 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Nissan Versa Sedan without LED Taillights (Part #BKDK56185) fits the following vehicles: 2014-2018 Nissan Versa. Always verify your specific year, make, and model before ordering.
The CURT 56185 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Nissan Versa Sedan without LED Taillights (Part #BKDK56185) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56185 is designed specifically for the Nissan Versa Sedan. The installation accesses the vehicle's wiring harness connectors behind the taillight housing in positions P1 and P2.
Yes, you must disconnect the negative battery terminal before beginning installation. This is done in Step 2, after accessing the wiring harness connectors.
You must remove: all trunk floor coverings, two plastic push fasteners and two 10mm screws from the rear scuff panel, the rear scuff panel itself, plastic push fasteners holding the felt trunk liner, and the two 10mm nuts holding the taillight housing in place. This exposes the taillight wiring harness connectors.
Remove the grommet that the taillight wiring harness passes through. Make a cut in the grommet from the middle outwards large enough to pass the T-Connector housings through. Route the T-Connector end with the yellow wire from inside the vehicle through the grommet's hole, pass the housings through the grommet, and reinstall the grommet back into the vehicle.
Insert the T-Connector end with the yellow wire between the separated housings. Make sure the housings are fully inserted with locking tabs in place. Take care not to damage the locking tabs when separating or reconnecting the connectors.
Locate a flat spot inside the vehicle and adhere the black converter box using the double-sided tape provided. The manual does not specify a particular location, only that it should be mounted on a flat surface.
Locate a suitable grounding point near the converter box, such as an existing screw with nut in the vehicle's frame, or drill a 3/32" pilot hole for the provided screw. Clean the ground area from any rust, dirt or paint. Secure the white ground wire using the ring terminal and screw provided.
Drilling may be required. You must locate a suitable grounding point near the converter box. If an existing screw with nut is not available in the vehicle's frame, you will need to drill a 3/32" pilot hole for the provided grounding screw. Before drilling, verify that miscellaneous items hidden behind or under surfaces will not be damaged.
Yes. After completing Steps 4 through 7 on the driver's side with the yellow wire T-Connector, you must repeat the same steps on the passenger side using the T-Connector end with the green wire. Use the provided cable ties to secure any loose wires.
Route the 4-flat out from under the felt trunk liner to the center of the vehicle when in use. Roll up and store in an out of the way location when not in use.
The product has the following maximum load ratings: Signal Circuits: 3.0 Amps; Tail/Running Light Circuits: 7.5 Amps. Do not exceed the product's load rating or the tow vehicle's lamp load rating, whichever is lower. Exceeding the load rating can cause loss of warranty, overheating and potentially fire. Check the vehicle owner's manual or contact the vehicle's manufacturer for the tow vehicle's lamp load rating.
The kit includes: a T-Connector harness with yellow and green wire ends, a black converter box, double-sided tape for mounting the converter box, a white ground wire with ring terminal and screw for grounding, and cable ties for securing loose wires.
Yes, the Curt 56185 is designed for the Nissan Versa Sedan.
Yes, disconnect the negative battery terminal before starting installation.
Signal Circuits: 3.0 Amps; Tail/Running Light Circuits: 7.5 Amps. Do not exceed these ratings or the tow vehicle's lamp load rating, whichever is lower, to avoid overheating and fire.
Yes, you must remove the two 10mm nuts holding the taillight housing in place to access the vehicle's taillight wiring harness connectors.
Yes, you must install T-Connector ends on both the driver's side (yellow wire) and passenger side (green wire) of the vehicle.
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