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CURT
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2020 - 2023 Tesla 3
Confirmed to Fit
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Always the correct part
We know our products
Quality Products
Free Shipping!
Plugs into vehicle tail light assembly to provide a 4-way flat socket
Simple plug-and-play design eliminates the need for cutting or splicing
Plugs into vehicle tail light assembly to provide a 4-way flat socket
Battery-Powered: Yes
Converter Type: Universal, Potted, Powered, Protected, PWM
Electrical Component Location: Vehicle / Trailer
Electrical Package Type: Packaged
Electrical System Type: 2W
Material: THERMOPLASTIC RUBBER
Output Type: 4-Way Flat
Shipping Weight: 1.660 lbs
T-Connector Location: P3,P4
Tail Light Circuits: 7.5 Amps
Turn and Brake Circuits: 5.0 Amps
Warranty: One-Year Limited Warranty
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 Tesla Model 3 (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 888-634-9494One-Year Limited
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2020 - 2023 | Tesla 3 | — |
The CURT 56549 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Tesla Model 3 (Part #BKDK56549) fits 2020-2023 Tesla 3 models. The 2023 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56549 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Tesla Model 3 (Part #BKDK56549) fits the following vehicles: 2020-2023 Tesla 3. Always verify your specific year, make, and model before ordering.
Yes, the CURT 56549 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Tesla Model 3 (Part #BKDK56549) is designed to fit the 2020-2023 Tesla 3.
The CURT 56549 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Tesla Model 3 (Part #BKDK56549) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
Part 56549 is a custom wiring harness with powered converter system designed for passenger cars. It provides electrical connections for trailer lighting functions including left turn (yellow wire), right turn (green wire), brake (red wire), and taillight (brown wire) circuits. The system includes a converter module that mounts to the vehicle and connects to the vehicle battery through a 12-gauge power wire with a 15-amp fuse.
Part 56549 is designed for passenger cars with 12-volt negative ground electrical systems. The manual does not specify which vehicle makes, models or years are compatible. Contact Curt Manufacturing or consult a fitment database to confirm compatibility with your specific vehicle before purchasing.
No. The converter system is designed only for 12-volt negative ground systems. It cannot be used on positive ground vehicles.
You will need: ratchet, 10mm socket, wire cutter, wire stripper, panel trim removal tool, and wire crimper. Proper tools will improve installation quality and reduce installation time.
The manual confirms the kit includes cable ties, a 4-flat dust cover, a ground screw, double-sided tape for converter mounting, and a fuse holder with 15-amp fuse. The exact quantity of each item is not specified in the manual.
Yes. You must disconnect the negative battery cable at the start of installation and fasten it down and away from the battery. Reconnect it only after all other installation steps are complete and the 15-amp fuse has been installed.
The installation is rated as Difficult. Difficulty levels are based on time and effort involved and may vary depending on installer expertise, vehicle condition, and availability of proper tools and equipment.
Access the vehicle information center to open the vehicle hood or 'frunk' area. The battery is located under the hood. Use a panel trim tool to loosen and remove the trim cover straight up to expose the battery.
Open the rear trunk and remove the floor coverings to access the lower storage area. Use a panel trim tool to loosen and remove the threshold straight up. Then use the trim tool to remove the clips holding the felt liner on each side. Pull back the felt liner on both driver and passenger sides to expose the vehicle taillight connectors.
Starting on the driver side, locate the vehicle taillight wiring connectors. Separate the connectors from the taillight housing, taking care not to damage the locking tabs. Insert the custom wiring end with the yellow wire between the separated connectors. Make sure the connectors are fully inserted with locking tabs in place. Repeat on the passenger side with the connector containing the green wire.
Route the harness down between the driver side of the vehicle and the felt liner. Route the green wire along the rear of the vehicle to the passenger side, between the felt liner, to the passenger side taillight connectors. Secure all loose wires with the cable ties provided. When in use, route the 4-flat connector with the center of the vehicle and out of the hatch to the trailer, staying clear of the hatch latching mechanism. When not in use, roll up and store in a convenient, out-of-the-way location.
Not necessarily. Locate an existing screw or bolt in the vehicle frame to use as a grounding point. If no suitable existing fastener is available, you may drill a 3/32-inch pilot hole. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. The area must be free from rust, dirt, and paint; use an abrasive pad or paper to clean it.
If an existing fastener is not available, drill a 3/32-inch pilot hole for the ground screw. Before drilling, ensure the area is free from rust, dirt, and paint by using an abrasive pad or paper, and check for hidden items behind or under the surface.
Signal circuits (left and right turn): 5.0 amps per side. Tail/Running circuits: 7.5 amps total. Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. The battery connection must be fuse-protected with a 15-amp maximum fuse. Exceeding the product rating can cause loss of warranty, overheating, and potential fire.
Yellow wire = Left turn. Green wire = Right turn. Red wire = Brake. Brown wire = Taillight. White wire = Ground. Black wire = Power (12-volt positive from battery).
The power wire from the vehicle battery must be 12-gauge or larger. Route it to the vehicle battery location, taking care to avoid pinch points and hot or rotating components. When passing the power wire through sheet metal, use an existing grommet, add a grommet, or use silicone to protect the wire from sharp edges.
Route the 12-gauge black power wire to the positive (+) battery terminal. Use a ring terminal for the battery connection. The battery connection must be protected by a 15-amp maximum fuse. Install the fuse after all other installation steps are complete. Do not lay tools across the positive battery terminal, as this can cause a ground short leading to sparks and/or electrical shocks.
Attach the ring terminal of the white ground wire to the vehicle body using the screw provided. If no suitable existing fastener is available, drill a 3/32-inch pilot hole. The area must be free from rust, dirt, and paint; use an abrasive pad or paper to clean it before securing the ground wire.
Mount the converter using the provided double-sided tape. The manual does not specify the exact mounting location on the vehicle.
The battery connection must be protected by a fuse holder with a 15-amp maximum fuse. Install the fuse after all other installation steps are complete. Exceeding this rating can cause loss of warranty, overheating, and potential fire.
Do not lay tools across the positive battery terminal (typically noted with red covers or a red '+' symbol), as this can cause a ground short leading to sparks and/or electrical shocks. 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 pinch points and hot or rotating components. Disconnect the negative battery cable before wiring the power wire and reconnect it only after the fuse is installed.
Once the 12-volt power wire is connected to the harness, verify that the harness is functioning by attaching the battery and testing with a test light, 4-flat tester, or a functioning trailer. Reinstall all items removed during installation. If the negative battery terminal was disconnected at the beginning, reconnect it. Install the provided 4-flat dust cover to help prevent corrosion.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. Install the provided 4-flat dust cover to help prevent corrosion when the connector is not in use.
Part 56549 is designed for passenger cars with 12-volt negative ground electrical systems. Confirm compatibility with your specific vehicle make, model and year before purchasing.
Ratchet, 10mm socket, wire cutter, wire stripper, panel trim removal tool, and wire crimper.
Yes, disconnect the negative battery cable before starting installation and reconnect it only after all other steps are complete and the 15-amp fuse is installed.
Drilling is not required if an existing screw or bolt is available on the vehicle frame for the ground connection. If not, drill a 3/32-inch pilot hole. Always check for hidden items before drilling.
15-amp maximum. The battery connection must be fuse-protected at this rating. Exceeding it can cause loss of warranty, overheating, and potential fire.
12-gauge or larger. Route it from the vehicle battery with a ring terminal connection, protected by a 15-amp fuse.
Do not lay tools across the positive battery terminal. Do not exceed the 15-amp fuse rating. Check for hidden items before drilling. Avoid pinch points and hot/rotating components when routing the power wire.
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