
Ask a Question About This Product
Our in-house experts typically reply within one business day.
Our in-house experts typically reply within one business day.
CURT
Verify Fitment
Select your vehicle to confirm this part fits.






Always the correct part
We know our products
Quality Products
Free Shipping!






Always the correct part
We know our products
Quality Products
Free Shipping!
| Battery-Powered | Yes |
| Converter Type | Universal, Potted, Powered, Protected, PWM |
| Electrical System Type | PWM |
| Finish | N/A |
| Material | Blank |
| Mount Type Description | Blank |
| Output Type | 4-Way Flat |
| Side Application Type Description | Blank |
| T-Connector Location | P3,P4 |
| Tail Light Circuits | 7.5 Amps |
| Turn and Brake Circuits | 5.0 Amps |
| Warranty | One-Year Limited Warranty |

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 |
|---|---|---|
| 2012 - 2016 | Chevrolet Sonic | Hatchback, excluding RS |
Yes, the 12-16 Chevrolet Sonic Hatchback, excluding RS CURT 4-flat Plug and Play Trailer Wiring (Part #CTW582) is designed to fit the 2012-2016 Chevrolet Sonic.
The 12-16 Chevrolet Sonic Hatchback, excluding RS CURT 4-flat Plug and Play Trailer Wiring (Part #CTW582) fits 2012-2016 Chevrolet Sonic models. The 2016 model year is the last year covered by this part number. For newer models, check for an updated version.
The 12-16 Chevrolet Sonic Hatchback, excluding RS CURT 4-flat Plug and Play Trailer Wiring (Part #CTW582) fits the following vehicles: 2012-2016 Chevrolet Sonic. Always verify your specific year, make, and model before ordering.
The 12-16 Chevrolet Sonic Hatchback, excluding RS CURT 4-flat Plug and Play Trailer Wiring (Part #CTW582) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The CURT 56303 is a powered converter lead that converts vehicle taillight signals to trailer lighting signals. It includes a converter box that processes left turn (yellow wire), right turn (green wire), brake (red wire), and taillight (brown wire) signals for use with a 4-flat trailer connector. The system is designed for passenger cars with 12-volt negative ground electrical systems.
The CURT 56303 is designed for passenger cars with 12-volt negative ground electrical systems. The manual does not specify which vehicle makes or models are compatible. Contact CURT or consult your vehicle's owner's manual to confirm your vehicle has a 12-volt negative ground system before purchasing.
Required tools are: ratchet, cutting tool, 10mm socket, wire stripper, Phillips screwdriver, wire crimper, flat blade screwdriver, and panel trim removal tool. Proper tools will improve installation quality and reduce installation time.
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 black power wire, a provided screw for grounding, double-sided tape for mounting the converter, cable ties for securing loose wires, a 4-flat dust cover, and a 15-amp fuse holder with 15-amp fuse.
Yes. You must disconnect the negative battery terminal before beginning installation. This is stated in Step 1 and reinforced in the Powered Converter Lead Instruction Sheet, which specifically warns to disconnect the negative battery cable before wiring the power wire.
Open the vehicle tailgate and remove all trunk floor coverings. Remove the scuff panel by pulling out on the bottom and then up. Remove the inspection cover on the driver side trunk liner by carefully removing two plastic push fasteners with a flathead screwdriver and one side fastener on the passenger side with a Phillips screwdriver. Pull back the felt liner to access the vehicle taillight wiring harness connectors.
Locate the vehicle taillight wiring harness connectors behind the trunk liner. The connectors will be similar to those on the custom wiring harness. 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 with the harness end with the green wire.
Drilling may be required for the ground wire connection. You may need to drill a 3/32" pilot hole for the provided screw if a suitable existing screw with nut is not available in the vehicle frame near the connector. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
Drill a 3/32" pilot hole if a suitable existing screw with nut is not available in the vehicle frame near the connector. The area should be free of rust, dirt and paint before drilling.
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 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 signal. Green wire = Right turn signal. Red wire = Brake signal. Brown wire = Taillight/running light. The custom wiring harness has separate ends with yellow and green wires for the driver and passenger sides respectively.
Route the 12 GA black power wire from the vehicle battery to the converter, taking care to avoid any 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 power wire from sharp edges. Secure the power wire to the vehicle chassis using the provided cable ties. The manual includes a diagram on the last page showing the routing path.
The battery connection must be fuse-protected with a 15-amp maximum fuse. A fuse holder with 15-amp fuse is provided. Install the fuse after all other installation steps are complete. Exceeding the 15-amp rating can cause loss of warranty, overheating and potential fire.
Secure the white ground wire using the ring terminal and provided screw to a suitable grounding point near the connector, such as an existing screw with nut in the vehicle frame. If no suitable existing screw is available, drill a 3/32" pilot hole. The area should be free of rust, dirt and paint before securing the ground wire.
Locate a flat clean surface that is out of the path of spray and debris from the rear wheels and road. Adhere the black converter box using the provided double-sided tape. Failure to mount the box in a protected area can cause loss of warranty, product failure, overheating and potential fire.
The provided 4-flat dust cover helps prevent corrosion of the 4-flat connector. Install it after all other installation steps are complete.
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.
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.
Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury. This is especially important when drilling the 3/32" pilot hole for the ground wire screw.
Route the 12 GA black power wire to the vehicle battery location, taking care to avoid any 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 power wire from sharp edges.
Reinstall all items removed during installation and reconnect the negative battery terminal. Install the provided 4-flat dust cover. Test for proper function by using a test light or connecting a properly wired trailer. Once installed, perform periodic inspection of all wires and connections to ensure there is no visible damage or loose connections.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. This helps maintain proper function and prevent warranty loss.
The CURT 56303 is designed for passenger cars with 12-volt negative ground electrical systems. Consult your vehicle's owner's manual or contact CURT to confirm compatibility before purchasing.
Yes, you must disconnect the negative battery terminal before beginning installation.
The maximum fuse rating is 15 amps. The battery connection must be fuse-protected with a 15-amp maximum fuse.
Use 12 GA wire or larger for the power wire routing from the vehicle battery to the converter.
The installation difficulty level is Moderate. Read all instructions thoroughly before beginning, and follow all steps to ensure proper function.
On Sale Today
Original price was $129.90. Current price is $122.76.




Quick Ship
In stock and ready to ship — order now!
FREE ShippingFREE SHIPPING
Estimated delivery Sun, Sep 6 - Wed, Sep 9
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
No reviews have been added for this product.