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FITS 2019 Kia Sorento
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Item # C56256
Our Price: $67.70
You Save: 43%
Custom Fit Vehicle Wiring
Confirmed to Fit
2019 Kia Sorento

without Factory Tow Package

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CURT custom fit vehicle wiring for your 2019 Kia Sorento are available from Installation instructions and reviews for your Kia custom fit vehicle wiring. Expert service, and great custom fit vehicle wiring prices. carries a complete line of CURT products. Order your Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part number C56256 online at or call 1-800-940-8924 for expert service.
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  • Reviews (186)
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2019 Kia Sorento - Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered Converter
  • CURT

Quickly and easily install a 4-way trailer connector on your Kia Sorento with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.


  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily
    • Locate connection points behind tail lights
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.

Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your cargo area.

It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.

Powered Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.

Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.

Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.

Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.

Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.

56256 CURT T-Connector Kia Sorento Wiring Harness with 4 Pole Trailer Connector

Installation Details C56256 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56256

Average Customer Rating:  4.7 out of 5 stars   (186 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.


Design lacking all but 1 bolt installed. I tried every configuration possible without success . Right rear horizontal either on or the other but not both were able to be installed. The only comfort is that this is to haul a 4 x 6 trailer with 2 kayaks of minimal weight .


Great how to videos. Easy installation. I was disappointed that I didn’t get the dust cover for the 4 pin connector.

The Curt T-connector wiring should have a small rubber dust cover for the 4 pin connection. I sent your information over to customer service.
-- Etrailer Expert Heather A - 08/23/2022

2015 KiaSorento

I purchased a 2020 Sorento and needed to tow trailers. I purchased the receiver as well as the T-connector wiring package. The wiring package was a breeze to put on, I followed the video from the web site, and had it installed in 15 minutes.

2014 KiaSorento

This is the second trailer wiring harness that I have installed on a Kia Sorento. The first was on my 2012 Sorento. This one is on my 2014 Sorento. Having used the online video installation instructions the first time around and having no problems, I went straight to the video for my 2014 Sorento. The Curt T-Connector kit makes wiring easy. No splicing, just plug in the matching connectors, mount the power converter and run a few wires for a ground and forward to your battery. Hiding the wires behind the hitch as per the instructions with cable ties gives a clean look. I also mounted a Curt plug receptacle to the hitch so that the connector is not just hanging on the safety chain holes. As you can see from the photo I believe this gives a clean , professional look.

by: 09/11/2022

My parts came very quick and were accur ate..ty


Took about an hour to install and was fairly easy. My vehicle required the tail lights to be removed and the wiring fed up inside the fenders and the main power wire had to be under the vehicle to the battery.

2017 KiaSorento

Started to mess with turn signals after about 6 months. Had to disconnect it to get turn signals to work correctly.


Easy to install, I like how it isolates the electrical system and it works great. Your video instructions were outstanding. With the video a five year old could install the wiring. This was installed in my 2019 Kia Sorento. The first pix shows in the back very low profile, the second pix shows inside the engine compartment, truly cool.

Ive had no issues at all. Works great. I did bottom-out once but it was my fault, deep ravine. The hitch seems to stabilize my rear end somewhat. Dont know if its good or bad. Forgot to mention, your wiring harness is super cool and easy to install.
Mr M - 03/05/2021


Installation was fairly painless and quick. Hardest part was removing the taillights. But it works great and didn't have any issues at all.


The harness connector c56256 not working properly. After installing trailer hitch looked good but the harness c56256 has problem, checked light left signal work brake light work but right signal not working.
I need to call or need nice replacement c56256 harness connector.

Customer Service will reach out to you.
-- Etrailer Expert Sierra K - 01/24/2022


The real deal. Don't waste time and money with other companies. Order what you need from here and you know it will be right.


My husband said it works great. The only issue was he had to run a wire from the back of the vehicle to the front to the battery. But, that is just because of the vehicle we have no fault of etrailer.


Paid for 2 day shipping and received it 5 days later. Don’t pay for the faster shipping.

We take pride in our shipping, and do not like to see any complications. I have sent your information over to our customer service department for them to assist you in this matter.
-- Etrailer Expert Katrina B - 05/31/2022


Works great. Glad I found it.


The install video is a great help


The second install - a "Upgraded" system worked great. It was a plug 'n play so I didn't have to splice, solder and tape wires. Your video and printed instructions were very clear and spot on. Screwed the flat 4-pole mounting bracket to the hitch frame and used JB Weld to bond the flat connector to the mounting bracket.


trouble free, no problems
bill a - 08/16/2018

2018 KiaSorento

Extremely helpful video on etrailer website convenienced me to purchase this wiring harness for my 2018 Kia Sorento. Every bit as easy as pie! A well engineered harness with plenty of length on the wiring and all the plugs matched. You may need additional black zip ties on hand if you’re picky like me.

Installed it a year ago. Everything still works perfectly! Be sure to watch the video before you begin installation and you will be just fine!
Jim H - 04/28/2019

2017 KiaSorento

Nicole T was a great saver of Get to g my vehicle ready to pull my trailer. The wiring harness I purchased thru a different supplier failed to ask a crucial vehicle option. It caused the wrong wiring harness to be purchased. I contacted Curt directly and Nicole T was on the job with her "A" game. She asked the right questions, allowing me to select the correct wiring harness. She arranged shipping to ensure I receive it as early as possible, the next day. Installation was quick & easy. Thank you Nicole T.

Great, it has lived up to my expectations. Again, without Nicole T knowledge of your products & ability to ask the required information, I would have had to postpone my trip & spend additional money. Thank you again Nicole T & Curt.
Pat a - 08/22/2019


Make sure you get right one before ordering as they won't let you return


Right part and on time.. good price

2017 KiaSorento

The item worked well until it recently failed for no particular reason that I can figure out. I have taken it apart almost entirely and still cannot get it to function without blowing a fuse. Was easy to install…. But will need to order a new one.

This sounds like the converter box on the trailer wiring has an internal problem which is usually caused by a short on the trailer wiring which is now causing the wiring harness to blow fuses. You will have to replace the trailer wiring harness, but before you do that, I would look over the trailer wiring to look for any signs of shorts like cut or exposed wires.
-- Etrailer Expert Sierra K - 10/18/2021

2016 KiaSorento

Simple to install only thing I didn't use that was sent was the butt connectors. Personally don't like that style . Small issue with preference is all. Looks like it was factory done and not after like other wireing harness that I have seen or used.

Have had one issue with it in a year. My right rear marker light will stay on if I leave the in line fuse in when no trailer is connected. Simple enough fix I dont pull a trailer that much so I just pull the fuse when Im not using it. Not sure if its auto manufacturer issue or trailer wiring issue but eh not that hard to overcome
Roger B - 02/19/2019


Perfect fit and easy install. I've used these guys for all of my towing needs


easy install. plug is tight to push in. im in canada and plug is getting corroded. used on a kia sorento 2014 ex


The trailer receiver was an easy installation, installing the wiring kit in a Kia Sorento was a pain.
We have been using the package for one year with no problems. Yes, I would order from Etrailer again.
My order was shipped promptly and arrived in good condition it was excactly as described.

Show More Reviews

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

  • Does Curt Trailer Wiring Harness Part # C56256 Fit 2017 Kia Sorento
    Yes, the Curt trailer wiring harness part # C56256 that you referenced is a confirmed fit for your 2017 Kia Sorento without the factory tow package. We confirmed this with our contacts at Curt.
    view full answer...
  • Does Trailer Wiring for 2015 Kia Sorento Require Running Power Wire to Vehicle Battery
    Not all vehicles can handle the additional amperage draw of the trailer taillights on the vehicle taillight circuits. Those vehicles need setup that draws power from the battery. Some vehicles have higher rated circuits that can handle this, and others need to have the power drawn straight from the battery to protect the taillight circuits. For your 2015 Kia Sorento you need to install a harness that draws power from the battery to protect the taillight circuits. For that you would need...
    view full answer...
  • Recommended Trailer Wiring Harness for a 2015 Kia Sorento
    The correct wiring harness for your 2015 Kia Sorento is the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # C56256 which will work with both 2.4L I4 and 3.3L V6 engines. I have attached an installation video of this harness installed on a similar 2015 Kia Sorento for you as well. If you would like for me to recommend any other items to complete your towing setup please let me know what those items are and I would be happy to do so.
    view full answer...
  • Trailer Wiring Install Video for Curt Harness Installed on 2018 Kia Sorento
    I attached a link below that shows the Curt trailer wiring harness part # C56256 installing on a similar 2016 Kia Sorento as your 2018 model. The years are different but the generations are the same so the process will be identical.
    view full answer...
  • Will Vehicle Tail Lights Work If Fuse On Vehicle Trailer Wiring Harness Is Removed?
    I looked up your order and the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56256 for your 2018 Kia Sorento will not work if you pull the in-line fuse for your trailer lights, but your vehicle lights and tail lights will not be impacted.
    view full answer...
  • Wiring Harness recommendation for 2016 Kia Sorento
    For your 2016 Kia Sorrento I recommend the Curt T-Connector Vehicle Wiring Harness # C56256. This wiring harness will plug into your vehicle's existing factory wiring, and the black wire hot lead will need to be connected to the vehicle's battery. The Curt T-Connector comes with a 4-way flat trailer connector. I have attached the installation instructions for you. I have also linked an installation video on a 2015 Kia Sorento.
    view full answer...
  • 2017 Kia Sorento Without Factory Tow Package Trailer Wiring Recommendation
    Short answer is we know the part # C56256 is a fit for your 2017 Kia Sorento as this harness plugs into the taillight connectors and provides the trailer wiring. Since it installs like this no tow package would be needed as all versions of the vehicle have the same taillights. Check out the install video I attached as well.
    view full answer...
  • Choosing a Wiring Kit for a 2016 Kia Sorento
    The part you will want is the Curt T-Connector Vehicle Wiring Harness, # C56256, which is a confirmed fit for 2016 Kia Sorento without the factory tow package. Please keep in mind that if you plan on towing with your vehicle, you will need a ball mount and hitch ball. I have linked a help article at the bottom of the page which will help determine the correct ball mount for you. I have included links to a video review and installation of this product, as well as a link to installation...
    view full answer...
  • Recommended Curt 4-Pole Wiring Harness for 2014 Kia Sorento 4-cylinder without Tow Package
    For your 2014 Kia Sorento 4-cylinder without a tow package the Curt 4-pole wiring harness you can install at your taillights is part # C56256. This installation consists of simply plugging together the harness connectors at your tail lights and then running one single power wire up to the battery. The linked install video and help article will help you with the routing of this one wire.
    view full answer...
  • Does Curt Trailer Wiring Harness # C56256 Fit 2019 Kia Sorento
    Yes, the Curt trailer wiring harness part # C56256 that you referenced does fit your 2019 Kia Sorento without the trailer towing package.
    view full answer...
  • Why Would Trailer Wiring of 2015 Kia Sorento Cause Blow Fuses in Vehicle
    Grounding issues do not typically cause fuses to blow since typically they just stop circuits from working. An insufficient ground won't overload a circuit and cause it to blow a fuse. To me this sounds like the converter box of the trailer wiring circuit has an internal problem most likely caused by a short on the trailer wiring which is now causing wiring of the harness to blow fuses. You'll have to replace the trailer wiring harness for your 2015 Kia Sorento and for that the most reliable...
    view full answer...
  • Recommended Vehicle Wiring Harness For A 2015 Kia Sorento
    When it comes to installing a trailer wiring harness on your 2015 Kia Sorento The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56256 is confirmed for your vehicle. Using this harness will make it to where your trailer's stop, turn, and tail lights mirror your vehicle's stop, turn, and tail lights. This custom-fit T-connector plugs into your vehicle's wiring harness which is located behind the driver's-side and passenger's-side tail lights. You will have...
    view full answer...
  • Trailer Wiring Harness Availability for 2016 Kia Sorento 4-Cylinder Turbo
    The 2016 Kia Sorento is part of the latest (third) generation of this vehicle. The Curt wiring harness you referenced, custom-fit 4-pole harness # C56256, is a confirmed fit for the 2016 Sorento and it fits either V6 or 4-cylinder versions without the factory tow package wiring. My contact at Curt verified this for me. If your Sorento does have the factory tow package then instead you will need part # C56332 which is a hardwire installation. The kit includes everything you need. I have...
    view full answer...
  • Compatibility of Curt # C56151 Trailer Wring Harness on 2016 Kia Sorento w/ Back Up Camera
    My contact at Curt Manufacturing tells me that their # C56332 trailer wiring harness is compatible with a 2016 Kia Sorento with a back-up camera as long as the vehicle is equipped with the tow package. If your Sorento isn't equipped with the tow package, you'll need to use a different wiring harness, part # C56256. This harness is also compatible with the back-up camera. If you click the provided link, you can see an install video showing both wiring harness being installed on a Sorento....
    view full answer...
  • How to Tell if 2020 Kia Sorento Has Factory Tow Package
    If your 2020 Kia Sorento has the factory tow package, there will be a tail light wiring connector behind the rear tire of the driver side, on the outside of the frame rail. As shown in the attached photos, an underbody cover will need to be removed to gain access to the factory tow ports. If you click on the installation video link provided for the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # C56332, you can get a clear idea of how to remove the cover and locate the...
    view full answer...
    Image 1 for Image 2 for
  • Troubleshooting T-Connector Wiring Harness Installation On 2015 Kia Sorento
    When installing a T-connector like part # C56256 and getting no signal to some of the wiring, the problem is the ground. Make sure the ground is attached to a clean bare metal surface and then recheck the lights. You can make sure you are getting current to the trailer plug by using a circuit tester like part # PTW2993. Have someone sit in the driver seat of your Sorento and run through the functions while you test the pins. Make sure all of the connectors are securely attached and you...
    view full answer...
  • Trailer Wiring Harness Recommendation for 2017 Kia Sorento
    For trailer wiring for your 2017 Kia Sorento we have the Curt Harness part # C56256 which is a fit for if your vehicle does not have the factory tow package and then if your vehicle does have the tow package you instead would want the part # 118269. I attached install videos for both wiring kits for you to check out as well.
    view full answer...
  • Adding a 7-Way Trailer Connector to a 2015 Hyundai Santa Fe with 4-Way Flat Already Installed
    Since there aren't any 7-Way trailer connectors that will plug into the 2015 Hyundai Santa Fe you will need to hardwire one in. Half the work is already done since you have a 4-Way installed already. All you will need is kit # ETBC7 to add a 7-Way and retain the 4-Way. I have included some links that show and explain the ETBC7 installation for you.
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  • Powered Trailer Wiring Harness for 2014 Kia Sorento
    All of the 4-pole trailer wiring harness kits we offer for the 2014 Kia Sorento, shown on the linked page, are the powered converter type. This means that a secondary 12V power connection for the harness is made directly to the vehicle battery, which provides the actual power to illuminate the trailer lights. This harness type does isolate the car's wiring from any potential faults or shorts on the trailer. The specific powered harness you need depends on how the car was equipped from...
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  • Parts Needed To Add 7-way Connector To 2018 Kia Sorento Without Factory Tow Package
    Since your 2018 Kia Sorento EX AWD with a V6 engine does not have the factory tow package the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56256 you were lookin at will fit perfectly and will give you a 4-way connector. Since your boat trailer has a 7-way connector but does not have trailer brakes you can use the Adapter 4-Pole to 7-Pole and 4-Pole # 37185 which will plug into your newly installed 4-way connector and give you both a 4-way and 7-way connector....
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  • Recommended Trailer Hitch Receiver and Trailer Wiring for 2014 Kia Sorento SXL
    The Trailer Hitch Receiver # E98841 is a fit for your 2014 Kia Sorento. It is a great option and will install in the same way as Hyundai Santa Fe in the attached video. I've also attached the installation instructions to assist. Then for your wiring, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56256. This harness will connect to the factory harness located behind each tail light and draw power directly from the battery to...
    view full answer...
  • Choosing Between Class II and III Hitch for 2014 Kia Sorento V6
    If the option is available, we always recommend going with a Class III. A Class III hitch will feature the more common 2 inch receiver opening that has many more compatible accessories available. In the case of your 2014 Sorento, the Class III hitch is actually a few dollars less expensive. The ground clearance for either hitch would be identical. Both hitches have plenty of capacity for your needs, and the Class III actually has a capacity that is higher than the 3500 lb tow rating of...
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  • Installing Trailer Wiring and Hitch Recommendation for a 2016 Kia Sorento 2.5L LX
    The process for installing trailer wiring harness # C56256 on your 2016 Kia Sorento will be the same as the video linked for the 2015. Vehicles come in generations and the custom fit items usually fit all models in that generation which is why you can go by the 2015 video. You cannot attach the power wire on the harness to that 12 volt outlet power wire. First, installing the harness in any other way than what's stated in the installation instructions would void your warranty protection. Secondly,...
    view full answer...
  • What Does Curt Trailer Hitch for a 2016 Kia Sorento Weigh, and What Other Parts are Needed to Tow
    The weight of the Curt Hitch part # C13195 that you referenced is right at 50 lbs. I am not sure how the Kia brand hitch comes out to 125 lbs unless it just is a much larger hitch. But this one will weigh less and I am sure cost less as well so it would be a better option. I attached an install video for this hitch for you to check out as well. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise...
    view full answer...

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Info for this part was:

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