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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: 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 Altima (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 |
|---|---|---|
| 2016 - 2026 | Nissan Altima | Installation Time: 30-60 minutes |
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Nissan Altima Trailer Connector Kit (Part #BKDK56339) is designed to fit the 2016-2026 Nissan Altima.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Nissan Altima Trailer Connector Kit (Part #BKDK56339) fits 2016-2026 Nissan Altima models. The 2026 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 Nissan Altima Trailer Connector Kit (Part #BKDK56339) fits the following vehicles: 2016-2026 Nissan Altima. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Nissan Altima Trailer Connector Kit (Part #BKDK56339) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56339 is designed for Nissan Altima passenger cars. The harness connects to the factory taillight wiring connectors located behind the rear scuff panel inside the trunk.
The Curt 56339 is a custom wiring harness that integrates with your Nissan Altima's factory taillight wiring to provide trailer lighting connections. It includes a converter box and a 4-flat connector for trailer use.
You will need a flat blade screwdriver, panel trim removal tool, wire stripper, wire crimper, and cutting tool. A drill may be needed if a suitable grounding point does not already exist on the vehicle frame.
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 installation.
The taillight wiring connectors are located behind the felt trunk liner on both the driver and passenger sides. You access them by removing the trunk floor coverings, rear scuff panel, and pulling back the felt liner to expose the connectors.
Insert the custom wiring harness end with the yellow wire between the separated factory taillight connectors on the driver side. Make sure the connectors are fully inserted with locking tabs in place. Repeat on the passenger side using the harness end with the green wire.
Drilling may be required for the grounding point. If a suitable existing screw with nut is not available on the vehicle frame near the taillight connector, you must drill a 3/32" pilot hole for the provided grounding screw. Before drilling, check for hidden items behind or under surfaces to avoid damage and personal injury.
A 3/32" pilot hole is required for the provided grounding screw if an existing screw with nut is not available on the vehicle frame.
Signal Circuits are rated at 3.0 amps per side. Tail/Running Circuits are rated at 6.0 amps total. Do not exceed these product ratings or the tow vehicle lamp load rating, whichever is lower.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this specification can cause loss of warranty, overheating and potential fire.
The maximum fuse rating is 10 amps. Exceeding this 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.
The black converter box should be adhered to a flat spot inside the vehicle near the taillight using the provided double-sided tape.
When not in use, roll up the 4-flat connector and store it in a convenient, out-of-the-way location. When in use, route it to the center of the vehicle. 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.
Install the provided 4-flat dust cover to help prevent corrosion. This is done after reconnecting the negative battery terminal at the end of installation.
1. Remove all trunk floor coverings. 2. Remove fasteners securing the rear scuff panel and pull it out at the bottom then up. 3. Remove cargo fasteners and push fasteners from the felt trunk liner. 4. Pull back the felt liner to access the taillight wiring connectors.
Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. The grounding area should be free of rust, dirt and paint.
The driver side harness end has a yellow wire. The passenger side harness end has a green wire. The white wire is the ground wire, and the black wire connects to the vehicle battery.
Locate a suitable grounding point near the connector, such as an existing screw with nut on the vehicle frame, or drill a 3/32" pilot hole. The area should be free of rust, dirt and paint. Secure the white ground wire using the ring terminal and provided screw.
Yes, the Curt 56339 is designed for Nissan Altima passenger cars and connects to the factory taillight wiring inside the trunk.
Yes, disconnect the negative battery terminal before starting installation.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this can cause overheating and fire.
Flat blade screwdriver, panel trim removal tool, wire stripper, wire crimper, cutting tool, and possibly a drill for the grounding hole.
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