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| Turn and Brake Circuits | 3.0 Amps |
| Warranty | One-Year Limited Warranty |
| Battery-Powered | Yes |
| Converter Type | Circuit Protected and Powered |
| Electrical System Type | 3W |
| 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 | 6.0 Amps |

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 |
|---|---|---|
| 2014 - 2018 | Kia Forte | Sedan |
The 14-18 KIA Forte Sedan CURT 4-flat Plug and Play Trailer Wiring (Part #CTW1590) fits 2014-2018 Kia Forte models. The 2018 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 14-18 KIA Forte Sedan CURT 4-flat Plug and Play Trailer Wiring (Part #CTW1590) is designed to fit the 2014-2018 Kia Forte.
The 14-18 KIA Forte Sedan CURT 4-flat Plug and Play Trailer Wiring (Part #CTW1590) fits the following vehicles: 2014-2018 Kia Forte. Always verify your specific year, make, and model before ordering.
The 14-18 KIA Forte Sedan CURT 4-flat Plug and Play Trailer Wiring (Part #CTW1590) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The CURT 56410 is a powered converter harness that converts factory taillight signals to a 4-flat trailer connector. It allows you to tow a trailer with electric brakes and turn signals on passenger cars equipped with factory taillight access via the trunk. The system includes a converter box, custom wiring harness with yellow and green wires for left and right turns, and a 12-volt power lead with a 10-amp fuse.
The CURT 56410 is designed for passenger cars with factory taillight access via the trunk. It is compatible only with 12-volt negative ground systems. The manual shows wiring locations P3 and P4 (behind driver and passenger side taillight housings inside the trunk). Consult your vehicle owner's manual or contact the vehicle manufacturer to confirm your specific vehicle is compatible, as the manual does not list specific makes and models.
No. The CURT 56410 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: panel trim removal tool, cutting tool, Phillips screwdriver, wire stripper, electrical tape, wire crimper, and a drill with a 3/32" bit (if drilling a grounding hole is necessary). The manual also recommends having a test light, 4-flat tester, or functioning trailer available to verify proper operation after installation.
The kit includes: custom wiring harness with yellow and green wires, black converter box, white ground wire with ring terminal, provided ground screw, double-sided tape for mounting the converter box, cable ties for securing wires, 4-flat dust cover, 10-amp fuse holder, and butt connectors. The 12-gauge power wire connects to the vehicle battery with a ring terminal and 10-amp fuse.
Yes. You must disconnect the negative battery terminal before beginning installation. Fasten this wire down and away from the battery during the installation process. Reconnect the negative battery terminal only after all other steps are complete and before testing the system.
You must remove: the trunk floor covering to expose the spare tire, the two cargo hooks on the rear scuff panel, the push fasteners under the scuff panel using a panel trim removal tool, and the taillight access covers by removing three push fasteners in the felt liner on each side. You will also need to fold back the felt trunk liner to access the factory taillight wiring harness.
On the driver side, fold back the felt trunk liner and disconnect the factory taillight from the factory wiring harness. Install the custom wiring harness with the yellow wire in its place. Repeat this process on the passenger side with the green wire. Route the custom wiring end with the green wire under the felt liner and scuff plate to the passenger side. Secure any loose wires with the provided cable ties.
Mount the black converter box on a flat, clean surface that is out of the path of spray and debris from the rear wheels and road. Use the provided double-sided tape to adhere it. Failure to mount the box in a protected area can cause loss of warranty, product failure, overheating and potential fire. The box must be positioned so the wiring can reach it from the taillight connections and the grounding point.
You should first locate an existing screw or bolt in the vehicle frame near the converter box to use as a grounding point. If no suitable existing fastener is available, you may drill a 3/32" pilot hole. The area must be free from rust, dirt, and paint—use an abrasive pad or paper to clean it before securing the white ground wire with the ring terminal. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
The wire colors are: Yellow = Left turn, Green = Right turn, Red = Brake, Brown = Taillight. The custom harness uses yellow on the driver side and green on the passenger side. The black power wire connects to the positive battery terminal, and the white ground wire connects to the vehicle frame or grounding point.
Route the black 12-gauge 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 wire from sharp edges. Secure the power wire to the vehicle chassis using the provided cable ties. The power wire must connect to the positive battery terminal with a ring terminal and be protected by a 10-amp fuse holder (install the fuse after all other steps are complete).
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. Install the fuse after all other installation steps are complete.
Signal circuits (turn signals) are rated at 3.0 amps per side. Tail and running light circuits are rated at 6.0 amps total. Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. Exceeding the product rating can cause loss of warranty, overheating and potential fire.
If you are using the CURT 56410 converter as a powered module for a two-wire trailer system, the red brake wire must be grounded to the vehicle frame or grounding point. This ensures proper brake signal transmission to the trailer. Consult the manual or contact CURT if you are unsure whether your trailer system requires this configuration.
When in use, route the 4-flat connector to the center of the vehicle and out of the trunk. When not in use, roll it up and store in a convenient, out-of-the-way location inside the trunk. Install the provided 4-flat dust cover to help prevent corrosion.
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 that all signal circuits (left turn, right turn, brake, and taillight) are working correctly before towing.
Reinstall all items removed during installation: the taillight access covers, the felt trunk liner, the scuff panel and its push fasteners, the cargo hooks on the rear scuff panel, and the trunk floor covering. Reconnect the negative battery terminal if it was disconnected at the beginning of installation.
Perform periodic inspection of all wires and connections to ensure there is no visible damage or loose connections. Check the 4-flat dust cover regularly to ensure it is in place and protecting the connector from corrosion. Secure any loose wires with cable ties as needed.
The CURT 56410 is designed for passenger cars with factory taillight access via the trunk and 12-volt negative ground systems only. Check your vehicle owner's manual or contact the vehicle manufacturer to confirm compatibility, as the manual does not list specific makes and models.
Yes, you must disconnect the negative battery terminal before beginning installation and reconnect it only after all other steps are complete.
Drilling is not always required. First locate an existing screw or bolt in the vehicle frame to ground the converter. If no suitable existing fastener is available, drill a 3/32" pilot hole. Before drilling, check for hidden items behind or under any surface to avoid damage.
The battery connection must use a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire.
The manual rates the installation difficulty as Easy. However, you must follow all steps carefully, including battery disconnection, taillight access, wiring connections, and proper grounding to ensure the product functions properly.
Perform periodic inspection of all wires and connections to ensure there is no visible damage or loose connections. Keep the 4-flat dust cover in place to prevent corrosion.




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