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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
Electrical System Type: 2W
Output Type: 4-Way Flat
Tail Light Circuits: 7.0 Amps
Turn and Brake Circuits: 5.0 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 Volkswagen Passat (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 |
|---|---|---|
| 2016 - 2019 | Volkswagen Passat | Installation Time: 30-60 minutes |
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Volkswagen Passat Trailer Connector Kit (Part #BKDK56440) fits 2016-2019 Volkswagen Passat models. The 2019 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 Volkswagen Passat Trailer Connector Kit (Part #BKDK56440) is designed to fit the 2016-2019 Volkswagen Passat.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Volkswagen Passat Trailer Connector Kit (Part #BKDK56440) fits the following vehicles: 2016-2019 Volkswagen Passat. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Volkswagen Passat Trailer Connector Kit (Part #BKDK56440) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
The CURT 56440 is a powered converter lead designed to convert a vehicle's factory taillight wiring into a trailer lighting connector. It allows you to connect a trailer with standard lighting to a passenger car that does not have factory trailer wiring. The converter processes the vehicle's existing taillight signals (left turn, right turn, brake, and tail/running lights) and outputs them through a 4-flat connector for trailer use.
The CURT 56440 is designed for passenger cars with 12-volt negative ground electrical systems. The manual does not provide a specific list of makes, models, or years. Consult the CURT fitment database or contact CURT directly to confirm compatibility with your specific vehicle before purchasing.
No. The CURT 56440 is designed for 12-volt negative ground systems only. It cannot be used on 24-volt systems or vehicles with positive ground electrical systems.
You will need: Allen wrench #3, wire crimper, panel trim removal tool, wire stripper, and a cutting tool. You may also need a drill with a 3/32" bit if you need to create a new grounding point on the vehicle frame.
The kit includes: a custom wiring harness with yellow and green wire ends, a black converter box, a white ground wire with ring terminal, a ground screw, double-sided tape for mounting the converter box, cable ties for securing loose wires, a 4-flat dust cover, and a fuse holder with 15-amp fuse.
Yes. You must disconnect the negative battery terminal before beginning installation. Look up the battery location in your vehicle's owner's manual. Be sure to fasten the disconnected wire down and away from the battery during installation. Reconnect the negative battery terminal after all other installation steps are complete.
Open the vehicle trunk and remove all trunk floor coverings and storage trays. This provides access to the interior felt liners and taillight wiring harness connectors needed for installation.
The black converter box mounts inside the vehicle on a flat spot near the taillight, using the provided double-sided tape. The box must be mounted in a protected area. Failure to mount the box in a protected area can cause loss of warranty, product failure, overheating and potential fire.
Remove the interior side felt liner to access the vehicle's taillight wiring harness connectors. Separate the connectors from the taillight housing, taking care not to damage the locking tabs. Insert the custom wiring harness end with the yellow wire between the separated connectors. Make sure the connectors are fully inserted with locking tabs in place. Repeat this process on the passenger side using the harness end with the green wire.
Route the custom wiring harness end with the green wire down behind the interior side felt liner and out to the passenger side behind the removed scuff panel. Route the black power wire from the vehicle battery as shown on the last page of the manual. When in use, route the 4-flat connector to the center of the vehicle and out of the trunk. When not in use, roll up and store in a convenient, out-of-the-way location inside the trunk. Secure any loose wires with the provided cable ties.
You may need to drill a 3/32" pilot hole if a suitable grounding point does not already exist on the vehicle frame near the converter box. The area should be free from rust, dirt, and paint—use an abrasive pad or paper to remove rust and paint before drilling. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
The installation uses double-sided tape to mount the converter box and does not require permanent modifications to the vehicle structure. However, you may need to drill a 3/32" pilot hole for the ground screw if no existing fastener is available. The interior trim panels are removed but not modified and are reinstalled after installation.
Signal circuits (left turn and right turn): 5.0 amps per side. Tail/Running circuits: 7.0 amps total. The battery connection must be fuse-protected with a 15-amp maximum fuse. Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower.
The power wire is 12 gauge (12 GA) or larger. Route the 12 GA wire to the vehicle battery location, taking care to avoid any pinch points and hot or rotating components.
The wiring harness uses the following colors: Yellow = Left turn, Green = Right turn, Red = Brake, Brown = Tail/Running lights. The custom wiring harness has a yellow wire end for the driver side and a green wire end for the passenger side. The black power wire connects to the vehicle battery positive terminal. The white ground wire connects to the vehicle frame or body.
Route the black 12 GA power wire from the converter to the vehicle battery location. Use a ring terminal for the battery connection. Connect the ring terminal to the positive battery (+) terminal. Install the provided fuse holder with a 15-amp fuse after all other installation steps are complete. The battery connection must be fuse-protected with a 15-amp maximum fuse.
Locate a grounding point near the converter box, such as an existing screw or bolt in the vehicle frame. If no existing fastener is available, drill a 3/32" pilot hole. The area should be free from rust, dirt, and paint—use an abrasive pad or paper to clean it. Secure the white ground wire with the ring terminal on the existing fastener or with the provided ground screw.
Route the black power wire from the vehicle battery as shown on the last page of the manual. When passing the power wire through sheet metal, use an existing grommet, add a grommet, or use silicone to protect the power wire from sharp edges. Secure the power wire to the vehicle chassis using the provided cable ties. Avoid any pinch points and hot or rotating components.
The maximum fuse rating is 15 amps. The battery connection must be fuse-protected with a 15-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire. Install the fuse after all other installation steps are complete.
Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. When routing the power wire, avoid any pinch points and hot or rotating components. Disconnect the negative battery terminal before wiring the power wire. Ensure the converter box is mounted in a protected area to prevent overheating and potential fire. Do not exceed the product rating or tow vehicle lamp load rating.
Reinstall all items removed during installation, including trunk floor coverings, storage trays, interior felt liners, and scuff panels. Reconnect the negative battery terminal if it was disconnected at the beginning of installation. Install the provided 4-flat dust cover to help prevent corrosion. Test for proper function by using a test light or connecting a properly wired trailer.
Perform periodic inspection of all wires and connections to ensure there is no visible damage or loose connections. Check the 4-flat connector and dust cover regularly to ensure they are clean and free from corrosion.
The CURT 56440 is designed for passenger cars with 12-volt negative ground electrical systems. Consult the CURT fitment database or contact CURT directly to confirm compatibility with your specific vehicle make, model, and year before purchasing.
Yes. Disconnect the negative battery terminal before beginning installation and reconnect it after all other steps are complete.
Drilling may be required. You may need to drill a 3/32" pilot hole if a suitable grounding point does not already exist on the vehicle frame near the converter box. Check for hidden items before drilling.
The power wire is 12 gauge (12 GA) or larger. Route it from the converter to the vehicle battery positive terminal using a ring terminal and 15-amp fuse.
Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. Ensure the area is free from rust, dirt, and paint before securing fasteners.
Test for proper function by using a test light or connecting a properly wired trailer. Ensure all wires and connections are secure and free from damage.
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