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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 # HM11143865
Our Price: $76.04
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Custom Fit Vehicle Wiring

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Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Converter HM11143865
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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 - no cutting or splicing required. 1-800-940-8924 to order Hopkins custom fit vehicle wiring part number HM11143865 or order online at Free expert support on all Hopkins products. Great prices 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.
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Hopkins Custom Fit Vehicle Wiring - HM11143865

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 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 - no cutting or splicing required.


  • 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 - no cutting or splicing
    • Locate connection point in rear cargo area
    • Plug in connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
  • Protective connection terminals resist corrosion
  • Comes with dust cap for 4-way flat connector, cable ties, and terminal grease packet for electrical connections
  • 90-Day limited warranty


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located in your rear cargo area, either behind the driver's-side trim panel or in the spare tire compartment.

Once installation is complete, the 4-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.

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.

Tail Light Converter

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

11143865 Plug-in Simple Hopkins T-Connector with 4-Pole Trailer Connector

Installation Details HM11143865 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - HM11143865

Average Customer Rating:  4.8 out of 5 stars   (274 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 - no cutting or splicing required.

2010 Subaru Outback Wagon

Easy to install. I had to access the wiring harness by the spare tire, then connect the trailer wiring. No cutting of wires or splicing is necessary. Plug and play.



Still working great after a year. No issues. I installed the harness for my Waverunner trailer.

2014 Subaru Forester

I purchased a hitch and wiring harness for my Subaru. My order was promptly filled and shipped. Everything went together smoothly and the how-to videos are outstanding. Big thumbs up to a great company!


Great YouTube videos reviewing wiring harness options and how to install them!


Super simple installation and works like a charm.


Easy to install and works great. I would recommend getting the mounting bracket that they offer (Item # HM48595) for the connector to keep it secured and easy to access.




Easy solo-installation. Precut holes lined up perfectly and instructions were clear and easy to follow. Product performed with zero issues. My wife was rear-ended recently, the 5” rise hitch took the entirety of the blow. After inspections by Subaru they concluded there was zero damage to the car, frame and hitch receiver. 5” rise was bent and replaced. Not sure if its protocol to replace this despite the mechanic’s assessment but I included this to support the idea that this receiver is sturdy and well designed for use well beyond the capabilities of this car.


Glad one of the videos mentioned the difficulty of reaching the harness in Subaru Outbacks.


Installation was simple once I found the connection point. The plug wasn't as easily accessible as the videos showed. Instead, you need to remove the cargo hitch point to find the short lead behind it. Once you have that, it's simple.


Wires are shorter than in the picture. You have to drop your exhaust so you can lower hitch to pass wire harness between body and hitch crossbar otherwise wire will be too short. Grommet is WAAAAAY TOOO BIG! So unless you want to grind for an hour and hope you keep the hole round your only option is to cut the wires and drill a hole in the factory grommet. This also solves the problem of needing to drop the hitch. This would have been an easy job if the grommet was the proper size and the wire on the end the grommet is on was 6 inches longer. Luckily I had some stainless self tapping screws to mount it in the spare tire well because it wouldn't go any higher with the short wire


excellent fit and built product for the trailer light connections.

2018 Subaru Forester

Friends: When I installed the trailer hitch I did not cut a section out of the heat shield above the muffler. Instead I drilled 5/8” holes where the bolts go through. The shield is already prepunched where it is to be drilled. I used butyl tape around the bolts to seal them and hold the bolts. For the wiring harness, I simply used Velcro to hold the unit to the inside of the spare tire well rather than tape.

2018 Subaru Crosstrek

2018 Subaru Crosstrek

The DYI videos
provided by provided a quick and easy how-to. It was literally as easy as watching the video on my computer and going out and installing it in 30 minutes. I also installed Mounting Bracket 4-Pole Flat, Item # 18144 and No-Drill Mount Bracket, Short, Item # 18140 and it looks great.


Terrible quality. Had shorted out in less than 1 month. Purchased another through another vendor because etrailer would not offer any discount or stand by the product I purchased from them.


It felt a little expensive, but after shopping realized it was the best product in price. It arrived in the mail today along with the hitch that I ordered from the trailer. The instructions were crystal clear, and I installed it in 15 minutes on my 2012 Subaru Forrester. I couldn’t believe how easy it was


Plug and play just like advertised


A perfect fit, includes all the pieces necessary, and has plenty of extra wire. I used double sided tape to stick my box to the inside of the spare tire compartment, everything is plug and play and it’s ready to go.


Installed perfect a year ago and no problems since. My 2nd hitch receiver from etrailer and I will be back

2017 Subaru XV Crosstrek

I used this wire harness along with the knockout plug adaptor part number 47605 on my 2017 crosstrek. It is very easy to use both on my crosstrek to make a clean look.


Hard to find the connector on car but works well.


Does the trick! As with all purchases I've made with etrailer, resources including pics, videos, and customer reviews make installation a breeze

Chevrolet Suburban

Excellent product. Fit my suburban perfect.make sure to watch the video instructions.that also was a key selling point for me. Simple install in my driveway with my wife's help!!


Easy installation

Subaru Forester

Perfect fit, great instructions,dealer did not have hitch and wiring for my new Subaru Forester, nor would have for weeks they said, so I went with etrailer for less than 300.00 dollars (hitch and wiring) a few weeks later the dealer called, said the hitch was in and they would install it, for a total cost of 740.00, well they are no longer my dealer, there is not enough room here to give etrailer the praise they deserve!!!

2014 Subaru Outback Wagon

This was the easiest hookup ever. Subaru plug pulled relatively easy. Make sure you mount the electrical interface box low enough in the wheel well that it doesn't impede proper placement of the foam insert storage tray. I didn't really need this now but likely will in the future. Costs a little more but install and through wheel well to hitch frame makes it the perfect choice and fit for my 2014 Subaru Outback.



Pretty much the same comment applies a year later. Easy install, all good. Only thing is my 4 pin connector cover snapped off somehow and I need to replace it.

Show More Reviews

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

  • Will the Hopkins Plug-In Simple Vehicle Wiring Harness Fit a 2017 Subaru Outback Wagon Touring
    I spoke with Hopkins about the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # HM11143865 and they stated that the harness is a fit for all models of a 2017 Subaru Outback Wagon without any trim exclusions. Therefore, you should be good to go with your Touring model.
    view full answer...
  • When Installing Hopkins Trailer Wiring in 2019 Subaru Crosstrek Does Exhaust Need to be Avoided
    You do want to make sure that the 4-way wiring of the # HM11143865 does not get close to the exhaust as it could potentially melt and damage it if so. This isn't covered in the attached install video as the exhaust is far enough away that our installer didn't feel it was important to make this warning but you'd need to use your best judgment.
    view full answer...
  • Installing 4-Way Trailer Wiring Harness In 2013 WRX Hatchback
    The vehicle body harness you need to plug into is located under the left (driver's side) sidewall. If you can't get easy access to it, I recommend removing the panel to gain easy access and then reinstalling the panel once connected. The connector may not be as loose as you expect, but it is there. I've attached the installation details for you. Unfortunately I don't have a video of the installation to attach for you.
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  • Does Hopkins Trailer Wiring Harness HM11143865 Fit 2018 Subaru Crosstrek
    For your 2018 Subaru Crosstrek the Hopkins trailer wiring harness part # HM11143865 that you referenced is a confirmed fit and would work well. It's a custom install wiring harness that would not require you to modify your vehicle in any way. Your Crosstrek will have the same port for installing this like what is seen in the install video I attached.
    view full answer...
  • Plugging Hopkins Trailer Wiring into 2017 Subaru Forester
    You would need to unplug what's in the current port that you found on your 2017 Subaru Forester to plug in the Hopkins part # HM11143865 that you have. I attached an install video for this on a 2017 Forester for you to check out as well.
    view full answer...
  • Recommended Trailer Hitch and Wiring for 2020 Subaru Forester
    We have just what you're looking for. I recommend using the Draw-Tite # 76271 since it would allow you the ability to use a weight distribution hitch if you were to decide to tow a different trailer that required a weight distribution hitch in the future. The Draw-Tite hitch is a stylish, round tube design with a 2" Class III receiver that easily bolts into the existing holes on your Forester's frame, so there won't be any drilling required. For wiring I recommend using the Hopkins Plug-In...
    view full answer...
  • Trailer Hitch and Wiring for a 2019 Subaru Forester
    We do have a hitch for your 2019 Subaru Forester, part # 76271 from Draw-Tite. The hitch is rated to tow up to 3,500 pounds but from my research your Forester is rated up to 1,500 pounds as long as the trailer has brakes. If it doesn't have brakes then you're limited to 1,000 pounds. Always make sure you stay within the limitations of the vehicle. To tow a trailer you also need a wiring harness. I recommend the Hopkins, part # HM11143865, because it's the easiest to insall and has...
    view full answer...
  • 2013 Subaru WRX Impreza Trailer Wiring Harness Recommendation
    Since your 2013 Impreza is a WRX wagon the trailer wiring you would need is a hardwire kit and not the custom install kit part # HM11143865 that you referenced. The # 119250KIT is the way to go. Instead of hardwiring to taillight circuits it uses sensors that clamp around them instead so you don't have to make any permanent modifications.
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  • Should Holes on Side of etrailer Hitch e98839 For 2015 Subaru Forester be Plugged
    You have an excellent eye! Those are actually drain holes on the side of the etrailer Trailer Hitch Receiver # e98839. The reason for the holes - which do not have to be plugged - is that the hitch is dipped in a liquid coating for rust prevention, and the holes allow the inside of the hitch to get that coating as well. The holes then allow the fluid to drain out of the hitch. So you don't have to worry about the holes causing any issues after installation of the etrailer Trailer Hitch...
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  • Concealed Trailer Hitch Fit For 2010 Subaru Outback For Towing Trailer
    You'll want to ensure your current factory hitch can be removed (it should be bolted on and not welded), and if so, there is a trailer hitch receiver with a concealed crosstube that does fit your 2010 Subaru Outback, which is from Curt. Since you mentioned you'll be towing, you'll also need a 4-flat trailer wiring harness, so I'll go ahead and list out both parts for you: - Curt Trailer Hitch Receiver # C13410 - Hopkins Plug-In Simple Vehicle Wiring Harness # HM11143865 You can mount...
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  • What Hitch Is Best For My 2016 Subaru Outback Wagon
    When it comes to which hitch is best for your 2016 Subaru Outback Wagon The Curt Trailer Hitch Receiver Custom Fit - Class III - 2 inch # C13410 work work out best. All three hitches for your vehicle are all hidden underneath your vehicle, so it looks cleaner on your vehicle. The main difference is that the Curt Hitch has a higher tongue weight rating then the other two and is made in the USA . It has a 2 inch by 2 inch receiver, it has a gross towing weight of up to 4,000 pounds and a...
    view full answer...
  • Comparing Curt, T-One, and Hopkins Trailer Wiring Kits for 2018 Subaru Forester
    We have three trailer wiring options for your 2018 Subaru Forester. We have the Curt option # C56040, the T-One option (my favorite) # 118467, and the Hopkins # HM11143865. The reason I favor and recommend the T-One kit part # 118467 is because the converter boxes on the T-One kits have been proven to us as being the most reliable. Trailer wiring shorts will easily damage the converter boxes of these kits which renders them totally inoperable but we have found that the T-One converter...
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    Image 1 for
  • Trailer Hitch For A 2022 Subaru Forester Wilderness
    When installing a trailer hitch on your 2022 Subaru Forester Wilderness The etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2 inch # e83ZR is confirmed to fit. The trailer hitch has a gross towing weight up to 3,500 pounds and has a gross tongue weight up to 525 pounds. I would recommend checking your vehicles manual for the proper towing capacity for your vehicle. Per our records it shows it can tow up to 3,000 pounds The hitch has a simple bolt-on installation...
    view full answer...
  • How To Install A 7-Way Wiring Harness On A 2015 Subaru XV Crosstrek
    In order to install a 7-way wiring harness on your 2015 Subaru XV Crosstrek you will first need to install a 4-flat wiring harness. I recommend the Hopkins Plug-In Simple Vehicle Wiring Harness part # HM11143865 as it is a direct fit, plug-and-play option for you vehicle eliminating the need to hardwire. To install the 7-way trailer wiring harness on your Subaru you will need to convert the prior 4-way into a 7-way. To do this you will want the Universal Installation Kit for Trailer Brake...
    view full answer...
  • Parts Needed To Tow a Trailer with a 2018 Subaru Forester Using EcoHitch Hidden Trailer Hitch
    The EcoHitch Hidden Trailer Hitch Receiver part # 306-X7216 is indeed a fit for a 2018 Subaru Forester and a great option. It can be used for hitch mounted accessories like bike racks and cargo carriers or towing. That said, if you'll be towing then you will need a few other things like the Hopkins Plug-In Simple Vehicle Wiring Harness part # HM11143865 and ball mount/hitch ball like the etrailer Ball Mount Kit part # 989900.
    view full answer...
  • Least Visible Hitch for a 2022 Subaru Forester
    The least visible hitch we have for a 2022 Subaru Forester is the EcoHitch Hidden Trailer Hitch Receiver # 306-X7391 which has a hidden cross tube so the only thing visible is the hitch receiver. I have include a picture that shows how much of the hitch shows when installed. The EcoHitch Hidden Trailer Hitch Receiver # 306-X7391 is made in the USA, has a bolt-on, no-drill installation and will provide you with a 2" hitch receiver which is the most common size used for hitch mounted accessories...
    view full answer...
    Image 1 for
  • Hitch Receiver and Wiring Harness for a 2022 Subaru Forester Wilderness
    Yes, the Curt Trailer Hitch Receiver item # C13409 does fit your 2022 Subaru Forester Wilderness. This hitch is custom fit and bolts directly to your frame with included hardware. I have attached an installation video. For a wiring harness that will control your trailer or accessories lights I recommend the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # HM11143865. This custom-fit T-connector plugs into your Subaru's wiring harness, which is located...
    view full answer...
  • Trailer Hitches for 2018 Subaru Forester
    There are quite a few and it can be rather confusing. For starters I recommend getting a Class III trailer hitch on your 2018 Subaru Forester. A Class III hitch has a higher weight capacity and is the larger 2 inch receiver. There are more accessory options, like bike racks and cargo carriers, that fit the 2 inch as opposed to the smaller 1-1/4 inch size. Of the Class III hitches for you there are basically two designs; a visible cross tube with the reciever coming directly from it...
    view full answer...
    Image 1 for
  • Is There a Recommended Drawbar for 1-1/4" Draw-Tite Trailer Hitch on 2019 Subaru Crosstrek
    Thank you for all of the information! Essentially you can use almost any drawbar that has a 1-1/4" shank for your application but Draw-Tite does recommend using the Drawbar # 36051 for the Trailer Hitch Receiver # 36644 on your 2019 Subaru Crosstrek. This has a 5/8" rise/1-1/4" drop and is compatible with hitch balls that have a 3/4" shank like the 1-7/8" # 19256 or the 2" # 19258. I have attached a link to a helpful article showing you how to determine is the rise/drop of this drawbar...
    view full answer...
    Image 1 for
  • Most Hidden Trailer Hitch Recommendation for 2020 Subaru Forester
    I have the perfect solution for you; the EcoHitch Hidden Hitch # 306-X7391 is the hitch that installs with the least visibility and will provide you with a 2" receiver at the back of your 2020 Subaru Forester. This is the perfect choice if you want a hitch that only the receiver is visible once installed, compared to other hitches for your vehicle that leave the cross tube and receiver completely visible. The EcoHitch Hidden Hitch offers a no drill installation that bolts on behind the...
    view full answer...
    Image 1 for
  • Does the Hopkins Fold-Over Mounting Bracket # HM48595 Fit Trailer Wiring of 2018 Subaru Crosstrek
    The Hopkins Fold-Over Mounting Bracket # HM48595 that you referenced can't work with Curt harnesses like the part # C56040 or the T-One kit part # 118467 as it's a bit too small. You'd have to use the Hopkins wiring harness part # HM11143865 or use the bracket # 18144 with the Curt or Tow Ready.
    view full answer...
  • Which Hitch is Better for a 2016 Subaru Outback Wagon?
    The Curt hitch receiver item # C13410 and the Draw-Tite hitch receiver item # 76227 are identical hitches in almost every way. They both have the same capacities and installation methods and are hard to identify once they're installed on a Subaru. The only noticeable difference is the extra pieces of steel welded around the drop down for the receiver from the cross tube. These hitches have not been changed since the reviews you read were made. I recommend going with the Draw-Tite item #...
    view full answer...
  • Best Hidden Hitch for a 2022 Subaru Forester
    I have a great hitch for your 2022 Subaru Forester and it has a subtle appearance once installed. All you will see is the 2" x 2" receiver. It is the Curt Trailer Hitch Receiver item # C47HR. This hitch installs behind the rear bumper instead of hanging below like most hitches. I have linked a picture and an installation video below so you can see the final product. If you're going to be towing a trailer you will also need the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat...
    view full answer...
    Image 1 for
  • Recommended Trailer Brake Controller and 7-Way for 2019 Subaru Outback
    The trailer brake controller I highly recommend for a 2019 Subaru Outback is the Curt Echo Wireless Trailer Brake Controller part # C51180 which does not require any splicing or drilling into the dash. It will require the Hopkins Plug-In Simple Vehicle Wiring Harness part # HM11143865 and 4 to 7-Way with 4-Way Adapter part # ETBC7L for installation. This is a great setup for towing and is very easy to install and setup comparatively.
    view full answer...

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