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Original price was $95.95. Current price is $82.16.You save $13.79 (14%)
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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 Mazda CX3 (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
3 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2018 - 2021 | Mazda 6 | Installation Time: 30-60 minutes |
| 2016 - 2021 | Mazda CX-3 | Installation Time: 30-60 minutes |
| 2016 - 2023 | Mazda MX-5 Miata | Installation Time: 30-60 minutes |
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Mazda CX-3 Trailer Connector Kit (Part #BKDK56300) fits 2018-2021 Mazda 6 models. The 2023 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 Mazda CX-3 Trailer Connector Kit (Part #BKDK56300) is designed to fit the 2018-2021 Mazda 6.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Mazda CX-3 Trailer Connector Kit (Part #BKDK56300) fits the following vehicles: 2018-2021 Mazda 6; 2016-2021 Mazda CX-3; 2016-2023 Mazda MX-5 Miata. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Mazda CX-3 Trailer Connector Kit (Part #BKDK56300) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56300 is designed for Mazda CX-3, Mazda 6, and Mazda MX-5 models. Installation procedures vary slightly by model: CX-3 and Mazda 6 require removal of floor coverings and cargo hold-downs from the trunk, while MX-5 requires removal of floor coverings and rear trunk panel. Consult the model-specific steps in the installation manual for your vehicle.
The Curt 56300 is a trailer wiring harness with a powered converter module. It connects your vehicle's taillight wiring to a 4-flat trailer connector, allowing you to tow a trailer with integrated lighting. The converter processes your vehicle's turn signal, brake, and taillight circuits to power the trailer lights.
Yes. The converter system is designed only for 12-volt negative ground systems. If your vehicle uses a different electrical system configuration, this product is not compatible.
Required tools are: ratchet, panel trim removal tool, 10mm socket, cutting tool, socket extension, wire crimper, flathead screwdriver, and wire stripper. Proper tools will improve installation quality and reduce installation time.
Yes. You must locate the vehicle's battery in the engine compartment on the driver side and disconnect the negative battery terminal before beginning installation. Fasten this wire down and away from the battery while completing the installation process. Reconnect it only after all other installation steps are complete.
Drilling may be required for the ground wire connection. You must locate a suitable grounding point near the taillight connector, such as an existing screw with nut in the vehicle frame. If no existing screw is available, you will need to drill a 3/32" pilot hole for the provided ground screw. The area must be free of rust, dirt, and paint before securing the white ground wire with the ring terminal.
Drill a 3/32" pilot hole if an existing screw with nut is not available at the grounding point. The area must be free of rust, dirt, and paint before installing the provided screw with the white ground wire ring terminal.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating, and potential fire. The fuse holder should be installed after all other installation steps are complete.
Signal circuits (turn signals): 3.0 amps per side. Tail/running circuits: 6.0 amps total. Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. For additional information, check your vehicle owner's manual or contact the vehicle manufacturer.
Use 12 GA (12-gauge) wire or larger for the power wire routing from the vehicle battery to the converter. Route the wire carefully 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.
The harness wire colors are: Green (right turn signal), Red (brake), Yellow (left turn signal), and Brown (taillight). 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, and the white ground wire connects to the vehicle body.
Mount the black converter box using the provided double-sided tape on a flat spot inside the vehicle near the taillight. The converter should be positioned after the custom wiring harness is inserted between the separated taillight connectors.
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 the 4-flat to the center of the vehicle. Secure any loose wires with the provided cable ties.
After connecting the 12-volt power wire 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. This confirms all circuits are working properly before regular use.
Perform periodic inspection of all wires and connections to ensure there is no visible damage or loose connections. Install the provided 4-flat dust cover to help prevent corrosion of the connector.
Before drilling to create the ground wire pilot hole, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. The area where you drill must be free of rust, dirt, and paint.
1. Disconnect negative battery terminal. 2. Open trunk and remove floor coverings to expose spare tire. 3. Remove push fasteners from rear scuff panel (2 on CX-3, 4 on Mazda 6) and remove the panel. 4. Remove push fasteners from sidewall covering and cargo hold-downs (CX-3 uses 10mm socket). 5. Pull back felt liner to locate taillight wiring harness connectors. 6. Separate connectors and insert custom harness with yellow wire between them. 7. Mount converter box with double-sided tape. 8. Secure white ground wire to frame with ring terminal and provided screw (drill 3/32" hole if needed). 9. Repeat steps 4-6 on passenger side with green wire harness end. 10. Route black power wire to battery, secure with cable ties, install fuse, reconnect battery, and reinstall removed items.
1. Disconnect negative battery terminal. 2. Open trunk and use panel trim removal tool to remove four push fasteners securing floor coverings, exposing the floorboard. 3. Use panel trim removal tool to remove four push fasteners securing rear trunk panel; remove panel toward front of vehicle and straight up. 4. Remove push fastener from sidewall covering on driver side. 5. Pull back felt liner to locate taillight wiring harness connectors. 6. Separate connectors and insert custom harness with yellow wire between them. 7. Mount converter box with double-sided tape. 8. Secure white ground wire to frame with ring terminal and provided screw (drill 3/32" hole if needed). 9. Repeat steps 4-6 on passenger side with green wire harness end. 10. Route black power wire to battery, secure with cable ties, install fuse, reconnect battery, and reinstall removed items.
Pull back the felt liner to locate 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 (driver side) between the separated connectors. 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.
Route the black power wire from the vehicle battery as shown on the provided Powered Converter Lead Instruction Sheet. The wire must be 12 GA or larger. Route it carefully to avoid pinch points and hot or rotating components. Secure the power wire to the vehicle chassis using the provided cable ties. When passing through sheet metal, use an existing grommet, add a grommet, or use silicone to protect the wire from sharp edges. Connect the ring terminal to the vehicle battery positive terminal. Install the fuse holder with a 10-amp maximum fuse after all other steps are complete.
The Curt 56300 is designed for Mazda CX-3, Mazda 6, and Mazda MX-5 only. Installation steps vary by model.
You need: ratchet, panel trim removal tool, 10mm socket, cutting tool, socket extension, wire crimper, flathead screwdriver, and wire stripper.
Yes, disconnect the negative battery terminal before starting installation and reconnect it only after all other steps are complete.
The battery connection must use a 10-amp maximum fuse. Exceeding this can cause overheating and fire.
Use 12 GA (12-gauge) wire or larger for the power wire from the battery to the converter.
After connecting the 12-volt power wire, verify the harness is functioning by testing with a test light, 4-flat tester, or a functioning trailer.
Periodically inspect all wires and connections for visible damage or loose connections. Install the provided 4-flat dust cover to prevent corrosion.
Total for 4 items:
$158.11$171.90
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