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Vehicle battery connection required
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 Fiat 500 (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 888-634-94941 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2012 - 2019 | Fiat 500 | Installation Time: 30-60 minutes |
Yes, the CURT 56174 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Fiat 500 (Part #BKDK56174) is designed to fit the 2012-2019 Fiat 500.
The CURT 56174 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Fiat 500 (Part #BKDK56174) fits 2012-2019 Fiat 500 models. The 2019 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56174 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Fiat 500 (Part #BKDK56174) fits the following vehicles: 2012-2019 Fiat 500. Always verify your specific year, make, and model before ordering.
The CURT 56174 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Fiat 500 (Part #BKDK56174) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
The Curt 56174 is a T-Connector wiring harness designed for the Fiat 500. It integrates with the vehicle's existing taillight wiring to enable trailer lighting control. The system includes a converter box, T-Connector ends with colour-coded wires (yellow and green), a ground wire, and a 4-flat connector for trailer use.
The manual specifies the Curt 56174 is designed for the Fiat 500. The manual does not identify any model year restrictions, cab styles, bed lengths, or other variants. Contact Curt Manufacturing technical support at 1-877-287-8634 to confirm fitment for your specific vehicle year and configuration.
The manual requires a Phillips screwdriver (to remove rear scuff panel screws) and a 10mm hex wrench or socket (to remove taillight housing bolts). A drill with a 3/32" bit is needed if you must create a grounding hole. The manual does not specify whether additional tools are required.
The kit includes a T-Connector with two colour-coded ends (yellow and green wires), a black converter box, a white ground wire with eyelet, double-sided tape for securing the converter box, a screw for the ground wire, cable ties for securing wires, and a 4-flat connector for trailer use. The manual does not list all fasteners or specify quantities.
Open the rear hatch and remove the two Phillips screws securing the rear scuff panel. Lift up the rear portion of the felt floor covering, then pull out the bottom of the scuff panel and lift it up to remove it. This provides access to the taillight housing. Remove the two 10mm hex bolts securing the taillight housing and remove it from the vehicle. Carefully separate the taillight connectors, taking care not to damage the locking tabs.
Route the T-Connector end with the yellow wire through the hole in the chassis on the driver's side. Cut a slit in the rubber grommet and route the T-Connector end through it. Insert the yellow-wire end between the separated taillight connectors, ensuring they are fully inserted with locking tabs in place. On the passenger side, repeat this process using the T-Connector end with the green wire. Use the provided cable ties to secure wires to existing wiring harnesses.
Locate a flat spot inside the vehicle behind the felt liner of the trunk. Adhere the black converter box to the frame of the vehicle using the double-sided tape provided. The converter box should be positioned near a suitable grounding point.
Drilling is required only if a suitable grounding point does not already exist near the converter box. If an existing screw with nut is not available in the vehicle's frame, you must drill a 3/32" hole to secure the eyelet of the white ground wire. The manual warns to verify miscellaneous items hidden behind or under surfaces before drilling to avoid damage and personal injury.
The battery connection must be fuse protected with a maximum of 10 amps. Exceeding this rating can cause loss of warranty, overheating, and potential fire. Do not exceed the tow vehicle's lamp load rating or the product rating, whichever is lower.
Signal Circuits: 3.0 amps per side. Tail/Running Circuits: 6.0 amps total. Do not exceed these ratings or the tow vehicle's lamp load rating, whichever is lower. Exceeding the product rating can cause loss of warranty, overheating, and potential fire.
The T-Connector has two colour-coded ends: yellow wire (driver's side) and green wire (passenger's side). Each end connects to the corresponding taillight connector on its respective side of the vehicle. The white wire is the ground wire with an eyelet for securing to the vehicle frame.
The manual directs you to review the CME-PCL-INS instruction sheet for specific power wire routing from the battery to the converter. The battery connection must be fuse protected with a maximum 10 amp fuse. Refer to the CME-PCL-INS sheet for the exact routing path and connection procedure.
Before drilling, verify that miscellaneous items hidden behind or under any surface will not be damaged. This includes checking for existing wiring, fuel lines, brake lines, or other components that could be damaged by drilling. Failure to do so can result in damage to the vehicle and personal injury.
The battery connection must use a maximum 10 amp fuse. Exceeding this rating can cause loss of warranty, overheating, and potential fire. Additionally, do not exceed the tow vehicle's lamp load rating or the product rating (Signal Circuits: 3.0 amps per side; Tail/Running Circuits: 6.0 amps total), whichever is lower.
Route the 4-flat connector out from under the felt trunk liner and to the center of the vehicle when in use. When not in use, roll it up and store it in an out-of-the-way location to prevent damage and maintain a clean interior.
After installation, verify that all removed items have been reinstalled, including the rear scuff panel, taillight housings, and trunk liner. Ensure all T-Connector ends are fully inserted with locking tabs in place. Check that the converter box is securely adhered and the ground wire is properly secured. Test the trailer lighting to confirm proper operation before towing.
The Curt 56174 is designed for the Fiat 500. For confirmation of fitment with your specific model year and configuration, contact Curt technical support at 1-877-287-8634.
You need a Phillips screwdriver, a 10mm hex wrench, and optionally a drill with a 3/32" bit (only if you must create a grounding hole). All other components are included in the kit.
The battery connection must be fuse protected with a maximum 10 amp fuse. Exceeding this can cause overheating, fire, and loss of warranty.
Signal Circuits: 3.0 amps per side. Tail/Running Circuits: 6.0 amps total. Do not exceed these or your vehicle's lamp load rating, whichever is lower.
Before drilling, verify that no hidden items (wiring, fuel lines, brake lines) will be damaged. Failure to do so can cause vehicle damage and personal injury.
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