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  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
2025 Cadillac CT5
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CURT

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

Part Number: C56149
In Stock
$48.91
Retail:$82.95
You Save: 41%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2025 Cadillac CT5

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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 C56149 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.
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  • Reviews (20)
  • Q & A (0)
  • Videos (1)
  • Photos

CURT Custom Fit Vehicle Wiring - C56149

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow-Ready Setup: 4-way flat connector powers trailer lights for safe towing.
  • Plug-and-Play Install: T-connector plugs in behind tail lights with no splicing.
  • Clean Factory Fit: Hidden design routes through interior panels for a neat look.
  • Durable Connection: Converter protects vehicle wiring and ensures signal match.
  • No Tow Package Needed: Adds trailer lighting capability to vehicles without factory wiring.

Features to know about

Installs Without Cutting or Splicing: Plug-In Harness

Wiring up a trailer usually means tracing and splicing wires, but this harness skips all that. The Curt T-Connector plugs straight into the factory tail light wiring to give you a 4-pole flat trailer connector. No cutting or soldering needed—just snap the connectors in place and you’re ready for trailer lights.

Saves Time with Quick Install: Behind-the-Tail-Light Connection

The harness connects right behind the tail lights, behind the interior trim panels in the rear cargo area. You don’t have to run wires through the whole vehicle, so installation stays clean and simple. Most folks finish the job in minutes with just basic tools.

Keeps Trailer Lighting Reliable: 4-Pole Flat Connector

Once installed, the 4-flat plug gives your trailer running lights, turn signals, and brake lights. It’s the standard connector for small and mid-size trailers, so you can hook up right away without adapters or rewiring.

Built for Clean, Factory-Style Fit: Hidden Plug and Lead Design

The harness tucks out of sight with a hidden plug-in layout that follows factory wiring routes. It keeps things neat inside the cargo area and offers a solid connection every time you tow.

Specs

  • Comparison diagram showing Curt T-Connector vehicle wiring harness models with labeled callouts displaying connector styles and wiring layouts for different vehicle applications.

56149 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Hopkins HM11143784

Installation Details C56149 Installation instructions

This Product Fits The Following Vehicles




Video of Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Video Thumbnail Video Player Dialog

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of CURT Custom Fit Vehicle Wiring - T-Connector Vehicle Wiring Harness 4-Pole Flat - C56149

Hi everybody, Andy here with etrailer.com. Let's take a real quick look at this Curt T-Connector Vehicle Wiring Harness with four pole flat trailer connector. Now this harness has been designed to fit your 2012 to 2017 Hyundai Accent Sedan. On custom fit parts such as this harness, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle and our fit guide will confirm if this will work for you or if we have another harness that will work for you. Now this harness is going to give you a four pole flat trailer connector at the back of your Accent to power your trailer signal lights.

This is also going to be compatible with five, six, and seven pole adapters. Those adapters are sold separately and as you notice here, a dust cap is also included to cover up those connection points when the plug is not in use. And if you notice here, this black box, this is a taillight converter that's built into this T-connector vehicle wiring harness. Now because most trailers run on a two wire system where the brake and turn signals are carried on one wire, the separate brake and turn signals from your vehicle's three way, three wire system need to be combined so they are compatible with the wiring system of your trailer. This converter box is going to combine the brake and turn signal functions of your automobile so that they can run on one wire to properly activate your trailer's taillights.

Now this will not affect how your taillights on your vehicle operate. By the way, Curt built each taillight converter using surface mount technology, giving you consistent, reliable performance. This is going to minimize trailer light yield and intensity while producing minimal heat and it's going to ensure superior operation even in rough road conditions. This harness is designed to connect quickly and easily. These custom fit T-connectors are going to plug into your Accent's vehicle wiring harness, which is gonna be located behind the driver's side and passenger side interior trim panels in the rear cargo area.

So once you get these plugged in, you will need to mount this converter box to a safe out the way location. You could do that with double-sided adhesive tape that's included with this kit or maybe one of the many cable ties that's also included with this kit. And then speaking of cable ties, you can use those to secure any excess or slack in your wiring. And then once installation is complete, this four way connector can be stowed in an out of the way location within your cargo area. Now instructions are also included to guide you through the installation process.

You will get a self-tapping screw there. So you can ground your ground wire securely here. And this ground wire is the white wire with the ring terminal attached to it. One other recommendation that I wanted to make is, it is recommended that you use a small amount of dielectric grease on all of your electrical connections, like the plugs on the vehicle and the four pole flat connector itself. That grease is designed to help prevent electrical failures caused by corrosion and moisture. So if you're interested in taking a look at that grease, on your screen, I do have our part number there. You can just take that part number, pop it into the search field of our website. That will take you to that grease and you can add that to your order. Well, I think that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy, thank you for joining me.

Ratings & Reviews

5.0

20 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.

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Very happy



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perfect fit , exceelent product



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Fits perfectly, very easy to install. Good product.



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works good after i had to cut plugs off and wire it direct



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The order was ship as says arrived on time and look like it will do the job will tell more when hook up will by from this seller again and thank you



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Excellent products and price. Extremely responsive Customer Service Dept. I highly recommend you try them.



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Works great! ...just snaps together in about 3 minutes! NOTE: If you are driving a late model car, you NEED one of these kits for the lights to work correctly!



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Very easy to install. Instructions are great. No sense splicing wires with options like this available. Highly recommended, no worries about loose connections or bad splices/exposure to weather.



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its a well made wiring harness....and makes hookups fast and easy...it;s over a year now and i have not had any problems....I would reccomend this wiring harness....



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I am very happy with my hitch and wiring harness. installation was a breeze. great products at a great price. thank you etrailer.com



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Awesome this is the 3rd hitch that I have bought from here. This was a super easy install with the wire and tools that were sent with the hitch. I installed the hitch and the wiring harnes in less than an hour in my driveway on a cold winter day. I love the product.



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So incredibly quick and easy to install on my 2016 Accent (hauling bicycles for my shop).



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Easiest wiring kit I have ever seen! Plug and play is so awesome .
Installed on my 2017 Hyundai accent sedan. I went above and beyond and drilled a hole through one of the weather plugs on undercarriage, instead of sending the wire out the trunk door. Extremely happy with how quick and easy this was..


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

  • How to Install a 4-Way Wiring Harness in a 2016 Hyundai Accent Sedan
    Hey Matt. The Curt T-Connector Vehicle Wiring Harness item # C56149 does indeed come with installation instructions. I have linked them below as well. The wiring harnesses you are looking for are located behind the driver's-side and passenger's-side interior trim panels in your rear cargo area. Right behind the tail lights essentially. As far as a ground goes. You can look around for a bolt and clean off the paint around it and attach it to that. Or you can drill a hole, clean the paint...
    view full answer...
  • Towing Package Recommendations for 2015 Hyundai Accent Sedan Receiver/Wiring/Draw Bar
    I recommend using the Curt Trailer Hitch Receiver # C11250 for your 2015 Hyundai Accent Sedan. I prefer it due to its construction and utilizing the extra mounting hole over the others. For wiring you will want the Curt T-Connector Vehicle Wiring Harness # C56149. Its simple plug and play design makes it a simple and clean installation. The Curt Class II Drawbar # C45521 will be utilized in the rise orientation with either a 2" Ball # A-82 or 1-7/8" Ball # A-80. Finally I recommend using...
    view full answer...
  • Recommended Trailer Hitch and Towing Accessories for 2013 Hyundai Accent
    The Draw-Tite Class I hitch, part # 24884 and the Curt Class I, part # C11250 share the same weight bearing capacity and installation procedure. The overall design is similar, but as you mentioned, the Curt uses round tubing for the crossbar of the hitch while the Draw-Tite uses square tubing. As far as the tubing goes, some folks find the round tube to be more visually attractive, but as far as strength and function goes, neither has an advantage. Both companies are reputable and make...
    view full answer...
  • Will Harness Wiring For 2014 Hyundai Accent Sedan Fit A Hatchback
    I spoke with my contact at Curt about your 2014 Hyundai Accent Hatchback. They told me that they have not verified a fit for the plug-in harness, part # C56149, you referenced, but they said it would probably be a fit. They did say that part # C56175 would work for your Accent. It is a non-powered harness and does require hardwiring into the vehicle wiring. This has a protected circuit module and will give you a 4-way connector at the rear of your vehicle. The installation instructions...
    view full answer...
  • Curt T-Connector 4-Pole Trailer Wiring Harness for 2014 Hyundai Accent Sedan
    The correct Curt T-Connector trailer wiring harness for your 2014 Hyundai Accent 4-door sedan is part # C56149. The part you referenced, # C56254, is a correct fit for the Hatchback version, but not for the sedan. This harness offers simple plug-in installation with no cutting or splicing of wires. The install instructions are linked for you. It is a good idea to apply dielectric grease # 11755 to the connectors before installation as this will help prevent entry of contaminants and moisture...
    view full answer...

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Info for this part was:

Employee Lindsey S
Updated by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Andy C
Installed by:
Andy C

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