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  1. Custom Fit Vehicle Wiring
  2. Hopkins
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Powered Converter
Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # HM11143820
Our Price: $67.38
You Save: 31%
Custom Fit Vehicle Wiring

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Hopkins Custom Fit Vehicle Wiring - HM11143820
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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. 1-833-496-1390 to order Hopkins custom fit vehicle wiring part number HM11143820 or order online at Free expert support on all Hopkins products. Guaranteed Lowest Price and Fastest Shipping for Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (19)
  • Q & A (0)
  • Photos
  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - HM11143820

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

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.


  • 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 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
  • Protective connection terminals resist corrosion
  • Comes with dust cap for 4-way flat connector, cable ties, and terminal grease packet for electrical connections


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • 90-Day limited 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, storage trays, and some interior paneling to access this harness. Once you've plugged in the connector, run the red hot lead up to your car battery. Connect the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.

T-One Connection Location Points Behind Tail Lights

Once installation is complete, the 4-way connector will be stowed in your rear 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

A tail light converter is built into this T-connector. This converter is a 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.

11143820 Plug-in Simple Hopkins T-Connector with 4-Pole Trailer Connector

Installation Details HM11143820 Installation instructions

This Product Fits The Following Vehicles

  • 2014 - 2015 Kia Sorento I4 models without factory tow package
  • 2014 - 2015 Kia Sorento V6 models without factory tow package
  • 2016 - 2020 Kia Sorento without Factory Tow Package

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - HM11143820

Average Customer Rating:  4.4 out of 5 stars   (19 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.


this wiring harness made the whole job pleasurable


No problem, the instructions were different than a video I watched and used that process. Otherwise the harness and trailer hitch install went ok. Good products.

It has done the job, no problem.
John P - 11/03/2017


Worked for about a month. Now only the left side light is illuminated and it is always illuminated until you unplug it. Doesn’t matter which trailer I plug in, the fault is always the same. No fuses are burned out and the wiring is not damaged. This is the same issue I had with the last wiring harness I purchased here, except that one lasted about a year. Very unfortunate and costly.

2014 Kia Sorento

I purchased a class III hitch and plug in wiring harness for my 2014Kia Sorento. Every thing i receiver from etrailer was exactly what they said it was and the instructions were very detailed but easy to follow! I am 65 and i installed everything myself in a little over an hour and a half! No items missing or not matching up. Etrailer is the real deal and i would purchase from them again. Best price i found and they saved me over $100.00. Stop looking and order from etrailer, i'll bet that $100.00 you won't be disappointed! !

2015 Kia Sorento

Easy Plug and Play installation. Make sure you keep the "waterproof" box inside the rear cargo area to avoid electrical shorts. Just have to feed the wires through OEM grommet.


Fits Perfect and order accurate as it always is!

2015 Kia Sorento

Product was an exact fit for my 2014 Kia Sorento. Video was easy to follow for installation

Great, exactly what was needed.
Terry S - 09/23/2020


Easy to install and has always worked on my trailer with no issues. Shopping on line the price was great too! :-)

2014 Kia Sorento

the wiring harness was just as simple as described. pretty much plug and play.Beautiful. just follow video

2014 Kia Sorento

quick delivery..but havent installed yet so i dont know how it works yet.


Thank you Adam!!!!!!! You went over and beyond to please my daughter and get exactly what she needed. Thank you. Great Service, Care and Products, will be back.
Have a Great Day!!!

2014 Kia Sorento

Amazing product. Such an easy installation. Go for it, you won't be disappointed.


Works as instructed with no issues hauling my boat with it.

2016 Kia Sorento

Works well. Easy instal. No problems after one year

2015 Kia Sorento

failed after 2 uses module failed


Never finish it too much unfercar.


Awesome. Arrived very quickly, and just as described. Thank you!


No problem also simple piece of cake


Always great!


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

  • Trailer Running Lights Stopped Working with 2015 Kia Sorento
    I will be happy to help figure out the problem with the wiring harness on your 2015 Kia Sorento. The first step is to determine where the problem is. To do this some testing is required using a circuit tester such as # PTW2993. Or if you have a meter that will work too. With the trailer disconnected you can test the wiring harness. First, check the brown wire that goes into the converter box from the vehicle. This is the running light circuit. If it does not show power with the vehicle...
    view full answer...
  • Troubleshooting Trailer Wiring Harness on 2014 Kia Sorento Right Turn Lit All the Time
    What you will want to do is test the wires going into the box of the converter box for voltage with a circuit tester like the # PTW2993 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then test the output side of the box to see if the current is making it through the converter. If not then the problem is that the converter box has shorted itself out and would need to be replaced. I attached a video that details how to do this...
    view full answer...
  • Trailer Hitch Recommendation and Towing Capacity of a 2015 Kia Sorento
    It will all depend on the towing capacity of your 2015 Kia Sorento. According to Kia the 2015 LX 4 cylinder has a 1,650 pound gross trailer weight capacity. The LX 6 cylinder models and EX 6 cylinder models have a 3,500 pound capacity. The SX and SXL models also are rated for 3,500 pounds. Provided the gross trailer weight of the trailer you want to tow is less than the gross trailer weight capacity of your model Sorento then you can tow the trailer using hitch # C13152. Since you plan...
    view full answer...
  • Recommended Trailer Hitch and Wiring for 2019 Kia Sorento
    I like the EcoHitch for the 2019 Kia Sorento. It's part # 306-X7320. Take a look at the picture I attached that shows how it looks on the vehicle. All you can see under the bumper is the receiver opening and none of the cross member because it's all hidden. It's really a much cleaner design than the other hitches where so much of it hangs down under the bumper. Then for the wiring the Hopkins, part # HM11143820, is my choice. All the options use a powered converter but the Hopkins's...
    view full answer...
    Image 1 for
  • Comparing Draw-Tite and Curt Trailer Hitches for a 2016 Kia Sorento 4 Cylinder
    The Curt trailer hitch # C13195 and Draw-Tite hitch # 75908 have similar designs and install the same way. Customers like the finish on the Curt hitch more. The biggest different is the tongue weight capacity of each of the hitches. The Curt hitch has a tongue weight capacity of 750 pounds and the Draw-Tite is rated at 500 pounds. But you have to go by the lowest rated component in the system. According to the owner's manual the Kia Sorento has a maximum tongue weight capacity of 280...
    view full answer...
  • Trailer Hitch and Wiring Recommendations for a 2016 Kia Sorento
    Any trusted mechanic or an RV dealer with a service center can install a trailer hitch for your 2016 Kia Sorento. If you want to use the hitch for a bike rack or cargo carrier I actually recommend Draw-Tite hitch # 75908. The Curt hitch # C13195 requires the use of a stabilization strap # 18050 for any non-trailer accessory whereas the Draw-Tite hitch does not. If you plan on towing then either hitch will work fine. I recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts;...
    view full answer...
  • Trailer wiring
    If you use an adapter like # 37185, and the black wire is extended and ran to the positive battery terminal through a # 9510 40A circuit breaker using # 10-1-1 wire, the battery on the trailer will receive a maintenance charge. However, due to the relatively small gauge of the wire and the distance between the battery and alternator an the trailer battery means that the system won't have the necessary power to charge a depleted battery. You'll still need a charger like # 329-GENIUS10 and...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee Kathleen M
Video by:
Kathleen M
Employee Alan C
Video by:
Alan C
Employee Laura H
Written by:
Laura H
Employee Randy B
Test Fit:
Randy B
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C

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