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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 # C56189
Our Price: $52.69
You Save: 29%
Custom Fit Vehicle Wiring

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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. 1-636-306-4830 to order CURT custom fit vehicle wiring part number C56189 or order online at 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 (21)
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  • Why etrailer?

CURT Custom Fit Vehicle Wiring - C56189

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

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.


  • 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 in rear cargo area
    • 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 in your rear cargo area. You will have to remove the rear scuff panel and interior side panels 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.

56189 Curt T-Connector - Surface Mount Technology - 4 Wire

Installation Details C56189 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56189

Average Customer Rating:  4.8 out of 5 stars   (21 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.


Just the part i needed. I've paid a shop to install these wiring harnesses on previous vehicles - really wonderful to just handle the installation myself. Thanks for the great how-to video etrailer!



Mitsubishi Outlander

Did not give it a five, not because of the hitch, installation was simplistic enough, needs two men, but when it comes to the wiring you have to remove everything in the back of the Mitsubishi Outlander to put in the wiring and then you have to run a wire to the front to the battery, put in a fuse link, not included, to make it work. Should have bought a more simple connection. But, I will talk to tech and maybe modify what I bought to make it a straight connection with no converter.
Oh, by the way, the hitch looks good on my unit.

Great, no problems.
Leroy H - 06/12/2017

2015 Mitsubishi Outlander

We had a friend help install it and it was super easy to do! It got us literally across the country (California to Florida) and half way back (Florida to Kansas) again!!! It's a sturdy product that did it's job perfectly and I'm so happy with it! The price was fantastic, too! Especially considering how expensive hitches can be!!! You guys saved us a lot of money and stressduring a BIG move. Thank you!!!

2014 Mitsubishi Outlander

Nice kit, can be a bugger to install due to needing to run wire for convertor all the way up to the battery. One issue with the instructions to note; on the driver's side connection, if you grab the first visible connectors behind the panel, they may not be the right ones. The T-connection will plug in but the harness will not operate correctly. My vehicle has the power-lift rear hatch and the correct connection to the taillight is hidden behind the motor that operates the hatch. So the motor must be removed to access the proper connection.


It does it's job and I love it! Was such an easy install with easy to follow directions!

2018 Mitsubishi Outlander

Works exactly as expected. It was a bit tight getting in behind the plastic cosmetic panels, but that's more of an issue with the vehicle design. The "T" connectors make it very easy. The 12V +ve lead is designed to be routed to the engine compartment for a regular Outlander. We have the PHEV which is much easier because the 12V battery is in the rear. The only way it would have been easier would be to have a PHEV dedicated version so that you don't have to cut and splice.

2016 Mitsubishi Outlander

Could not be any happier with my trailer hitch equipment. Best price of all 7 places I got quotes from and the delivery, scheduled for 2 weeks from purchase, came 4 days after purchase on-line. My mechanic installed it this morning and said it was exactly the right product for my car. Thanks so much!

2014 Mitsubishi Outlander

Good product. The power cord could have been thought out better. It comes with 4-5" of power cord attached to the box, along with a fuse holder, and then 20' of power cord. Other than that, nice product.


same with the harness. fits and works as it should. could not say anything negative about it.

2018 Mitsubishi Outlander

Works as it should on a 2018 Mitsubishi Outlander.


The trailer wiring kit was easy to install. The instructions were easy to follow.

2014 Mitsubishi Outlander

I had a defective unit arrive, but etrailer stood behind their products and quickly sent me a working unit. I will always buy from etrailer for all my trailer needs in the future.

2014 Mitsubishi Outlander

Product was exactly what I ordered. Easy installation instructions, there was also a video on the installation. The shipping was also fast! Much appreciated! I will definitely use this company again! Thank you again!


Still working great. At first had an issue with the main box but with the excellent customer service they hooked me up with a new one after troubleshooting over the phone.

2016 Mitsubishi Outlander

Very happy with my purchase. Shipping was very fast and cheap. My hitch actually came earlier than forecasted. Great pricing and super fast shipping. You can't ask for much more.


I received my order today and am happy with how quick it got here. I haven't opened it yet won't be able to install it until the weekend.


Everything went together and worked gre at

2015 Mitsubishi Outlander

This wiring system was really easy for our friend to install and easily tucked away when not in use! Love it.


Received product as stated.

2014 Mitsubishi Outlander Sport


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

  • Can Circuit In 3rd Row Of Mitsubishi Outlander 2017 Be Used For 12V Power To Trailer Connector
    It is never a good idea to use any circuits on a vehicle for the 12V power when installing a trailer wire harness. You can never be sure that something else is also attached tot he circuit and can malfunction at any time. It is better to run the power wire to the vehicle battery positive post. Using a supplemental 12V battery would provide the needed power as well, but it can be a bit cumbersome to carry a 12V battery in the trunk for the trailer connector. And you also run the risk of...
    view full answer...
  • Can I Use A Fuse Tap To Power Curt T-Connector On Mitsubishi Outlander
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # C56189 powered module would need to be powered by the battery. The powered module is designed to avoid overloading the vehicle's electrical system. I have attached an instruction sheet from Curt regarding extending the power wire to the battery. I have also attached a helpful article for your reference. If you are not able to find an existing grommet in the firewall you will need to drill one that you...
    view full answer...
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  • Trailer Wiring Harness for 2017 Mitsubishi Outlander GT without Tow Package
    The Curt trailer wiring harness part # C56189 that you referenced is a confirmed fit for your 2017 Mitsubishi Outlander with LED taillights and is the correct kit to use since you don't have the factory tow package.
    view full answer...
  • Is Curt Wiring Harness 56189 Compatible with 2018 Mitsubishi Outlander with Factory Tow Package
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56189 is still able to be used on your 2018 Mitsubishi Outlander with factory tow package. The factory wiring at the tail lights will be the same as a vehicle without the tow package and the power from your battery to the module will protect your electrical system. You can use that system without any issues.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2014 Mitsubishi Outlander
    We have two trailer wiring harnesses for your 2014 Mitsubishi Outlander available. Essentially they are the same harness made by two different companies. We tend to have better luck with the Tow Ready harnesses so I would recommend the part # 118482 over the Curt # C56189.
    view full answer...
  • Wiring Harness for 2014 Mitsubishi Outlander
    The wiring harness I highly recommend for your 2014 Mitsubishi Outlander, because of its reliability and ease of install, is the Tekonsha T-One Vehicle Wiring Harness # 118482. We have found the Tekonsha brand to be by far the most reliable trailer wiring harnesses and this is a confirmed fit for your '14 Outlander without the factory tow package. The Curt Wiring Harness # C56189 you were referring to has a 1-year warranty, so as long as you got it less than a year ago it is warrantied.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2016 Mitsubishi Outlander
    If your 2016 Mitsubishi Outlander has the tow package then you would need the part # C56296 that you referenced. If you do not have the tow package or do not want to mess with figuring out if you do the install harness part # C56189 will fit either way as it installs inline with the taillight harnesses. The easiest way to determine if you have a tow package is to check the window sticker or call a Mitsubishi dealer with your VIN. Since your vehicle is so new you probably have the window...
    view full answer...
  • Recommended Trailer Wiring Harness for a 2015 Mitsubishi Outlander Sport W/O Factory Towing Package
    The correct wiring harness for your 2015 Mitsubishi Outlander Sport without the factory towing package will depend on if you have LED or incandescent lights on the vehicle. If you have LED lights on your Outlander Sport, you will need the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118538. This will be a plug and play option, but you will need to run a line up to the battery for added power. If you have incandescent lights, you will need the Tekonsha Upgraded...
    view full answer...
  • Trailer Wiring Harness that Fits 2019 Mitsubishi Outlander
    For the 2019 Mitsubishi Outlander Curt lists the part # C56189 as a fit which plugs inline with the vehicle taillights. If you have the correct connector for the part # C56296 to fit there's a good chance it would work, but I'd recommend using a circuit tester like part # PTW2993 to test the pins of the connector to make sure they are active.
    view full answer...
  • Will Trailer Light Kit Work With Wiring Harness on 2014 Mitsubishi Outlander
    That is an excellent question and the answer is that your 2014 Mitsubishi Outlander will need to use the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56189 with the Submersible, Under 80" Trailer Light Kit # TL5RK due to the amperage draw you referenced. The Curt kit has a max amperage of 3 amps per circuit, which will be needed for the 2.5 amps of the trailer light kit; the T-One Vehicle Wiring Harness # 118482 has a 2.1 amp capacity, as you noted, and...
    view full answer...

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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Ronnie R
Updated by:
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Employee Kristina F
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