bing tracking image
  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
2006 Lincoln LS
etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
CURT

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Part Number: C56157
In Stock
$36.81
Retail:$65.99
You Save: 44%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2006 Lincoln LS

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56157 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (9)
  • Q & A (0)
  • Photos

CURT Custom Fit Vehicle Wiring - C56157

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-way flat connector powers trailer tail, turn, and brake lights.
  • Plug-and-Play Install: T-connector plugs inline with tail light wiring—no cutting needed.
  • Simple Wiring Power: Draws from vehicle tail light circuits, no battery connection required.
  • Signal Match Converter: Built-in converter syncs vehicle and trailer light functions correctly.
  • Clean, Hidden Fit: Compact harness stays tucked behind panels for a neat install.

Features to know about

Installs Fast Without Cutting Wires: Plug-In T-Connector

Wiring a trailer can be intimidating if it means splicing into the factory lighting, but this harness avoids that altogether. The Curt T-Connector plugs directly into the vehicle’s tail light wiring, giving you a clean 4-pole flat trailer connector without any cutting or soldering. It’s a simple plug-and-play install that lets you get your trailer lights working fast.

No Battery Connection Needed: Powered Through Taillight Circuits

Some powered converters require a wire to the vehicle’s battery, but this harness doesn’t. It draws power directly from the taillight circuits, so you don’t have to worry about routing a separate hot lead or finding a place to connect near the battery. That saves time and makes the install much tidier.

Protects Vehicle Wiring: Built-In Tail Light Converter

The built-in powered converter keeps the vehicle’s electrical system safe by matching the trailer’s wiring signals to the vehicle’s lighting circuits. It ensures proper function for running lights, turn signals, and brake lights without overloading or damaging factory wiring.

Ready for Basic Towing: 4-Flat Trailer Connector

The included 4-flat connector covers the essentials—running lights, turn signals, and brake lights—making it ideal for small or mid-size trailers that don’t require electric brakes. Once installed, just plug in your trailer and you’re ready to tow.

Specs

Electrical and Connector Specifications

  • Connector type: 4-Pole Flat Trailer Connector
  • Harness type: T-Connector Vehicle Wiring Harness
  • Converter type: Powered Converter
  • Power source: Draws power directly from vehicle taillight circuits (does not connect to battery)
  • Vehicle end connector: Vehicle-Side Plug-In

Comparison image showing multiple Curt T-Connector vehicle wiring harnesses with labeled connectors, illustrating differences in design and plug types for various Curt models.

Compatibility and Fit

  • Confirmed fit: Certain Kia Rio sedan and hatchback models (as indicated for Curt #C56157)
  • Not confirmed for: Massimo MSU400 Side by Side

Installation

  • Installation type: Plug-In, No Cutting Required
  • Connection points: Plugs in line with vehicle tail light wiring, behind both tail lights
  • Tow package requirement: Designed for models without factory tow package
  • Mounting: Module attaches to flat surface (uses two-sided tape)

56157 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Hopkins HM11143954

Installation Details C56157 Installation instructions

This Product Fits The Following Vehicles




Ratings & Reviews

4.9

9 reviews
Review sort icon
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.

by:

very easy to install thanks



by:

Robert profile picture

Robert

9/19/2024

GREAT, easy installation. Correct fit length and instructions



by:

Great product. Works great and installation was easy only took about 10 minutes.



by:

No hassle installation, everything just plugged right in.

Product arrived earlier than expected.



by:

Service was great. Knowledge, friendly, helpful.

Product fit was excellence as were the intructions. The no cut wiring is truly plug and play.

All around great online experience.



by:

got this for my Kia Rio. It was delivered quickly and was easy to install. Instructions were good. Only issue I had was with the two sided tape used to secure the module to a flat surface, it was not sticky enough to hold. I got my own tape and secured it, not a big deal, overall happy with this.



by:

I ordered two hitches from trailer and they arrived before there scheduled time with all the instructions. They were easy to install. George J was very helpful with my questions.I would recommend them to anyone asking about a hitch plus they were the cheapest anywhere. Thanks



by:

Excellent ! Was the quickest trailer wiring I ever did. Like plug and play with a computer.
Took longer to reinstall the trim pieces on my Kia Rio. God bless you.
Jesus is our hope for the future !



by:

excellent service easy quick install thanks again etrailer


9
9

See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Trailer Hitch for 2013 Kia Rio EX Sedan
    I have a solution for you, but a hitch from a 2004 Hyundai Accent will not fit on a 2013 Kia Rio Ex sedan; I understand the confusion since some of the hitches available for the 2013 Rio are also a fit on some Hyundai and Volkswagen models. Instead, you will want to use the Draw-Tite # 24884, which is a confirmed fit on the 2013 Kia Rio sedans. If you're going to be towing a small, lightweight trailer with this hitch, you'll need a few other components for a complete towing setup. I've...
    view full answer...
  • Trailer Wiring Harness for a 2012 Kia Rio EX 5-Door Hatchback
    Yes, the Curt trailer wiring harness # C56157 will fit your 2012 Kia Rio EX 5-door (the hatch counts as a door) hatchback! I have included a link to the installation instructions to the right for you. This harness just plugs in line with the tail light wiring so installation is easy.
    view full answer...
  • Availability of Trailer Harness for 2013 Kia Rio Hatchback That Doesnt Require Power Wire
    All of the trailer wiring harnesses for your 2013 Kia Rio do require a hot lead to be run to the vehicle's battery. This is actually required on this particular vehicle to both combine the light circuits so they are compatible with standard trailer wiring and also to provide enough power to actually activate them. The factory wiring on the Rio isn't quite strong enough by itself to power separate lights on a trailer so it needs the battery's help. For your Kia Rio Hatchback you will need...
    view full answer...
  • Will Curt Trailer Wiring Harness Work on 2013 Kia Rio
    The Curt T-Connector Vehicle Wiring Harness # C56157 will not damage the wiring of your 2013 Kia Rio. This harness is custom made for your Rio and plugs directly into the existing wiring in the rear cargo area, behind both tail lights. It has an included tail light converter so that the Rio's matches your trailer's. If you need a trailer hitch as well, the Draw-Tite Sportframe # 24884 is a confirmed fit for the Rio. This is a Class I hitch receiver rated for 2000 pounds towing and 200...
    view full answer...
  • Does this Wiring Harness for my 2013 Kia Rio 5 Connect to the Battery?
    You are correct, this wiring harness # C56157 does not need to connect to the car battery, confirmed by Curt and the installation instructions for this wiring harness. This harness draws power directly from the vehicle taillight circuits and plugs right into your 2013 Kia Rio's taillights. The installation process for this wiring harness is quick and easy. I have attached the installation instructions for this harness for you to check out. If you are also looking for a trailer hitch for...
    view full answer...
  • Curt Trailer Hitch Compatible with a 2015 or 2016 Kia Rio
    Yes, the Curt # C11250 will fit both a 2015 and a 2016 Kia Rio Sedan. I have attached an installation video for a 2013 Hyundai Accent for this same trailer hitch that you can use as a reference. For a complete towing setup you will also need a ball mount kit and wiring. A popular ball mount option is the Curt Euro Style Drawbar # C45572 which you can secure in your hitch receiver with the pin and clip # F-4. Then for wiring I recommend going with the Curt T-Connector # C56157. To install...
    view full answer...
  • Trailer Hitch and Wiring for a 2013 Kia Rio Sedan
    Draw-Tite trailer hitch # 24884 can handle the roughly 800 pounds of loaded trailer that you want to tow. But you have to check with Kia or your owner's manual to determine what, if any, towing capacity your 2013 Rio sedan has. I was unable to locate that information. In addition to the hitch you will also need the recommended ball mount # 3592 and a ball. For a 1-7/8 inch ball use # 19257 and for a 2 inch use # 19258. And for trailer wiring use # C56157 to add a 4-Way flat connector to...
    view full answer...
  • Trailer Wiring Harness for a Massimo MSU400 Side by Side
    Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Item # C56157 is for certain Kia vehicles and has not been tested or confirmed on side by sides like your Massimo MSU400. You will need to use a hardwire harness such as # 119178KIT to hardwire a trailer connector to your side by side.
    view full answer...
  • Wiring Harness Compatible with 2018 Kia Rio 5 Door Hatchback
    The only confirmed fit we have for your Kia Rio hatchback is the Curt Tail Light Converter with 4-Pole Flat Trailer Connector # C56236. The custom harness # C56157 is only a fit for the sedan model. I confirmed this with my tech contact at Curt.
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Installed by:
Jeff D
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.