bing tracking image
Customer Service My Orders
  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
1992 Mazda Protege
etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
SCHEDULE AN INSTALLATION
go
CURT

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

Part Number: C56243
21 Reviews | 14 Questions
In Stock
$80.26
Retail:$142.95
You Save: 44%
 Custom Fit Vehicle Wiring
Not Confirmed to Fit

1992 Mazda Protege

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Add to cart
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

spin image icon
curt custom fit vehicle wiring trailer hitch plug-in
curt custom fit vehicle wiring 4 flat plug-in c56243
curt custom fit vehicle wiring trailer hitch end connector
curt custom fit vehicle wiring end connector plug-in c56243
curt custom fit vehicle wiring trailer hitch plug-in t-connector harness with 4-pole flat connector

Show All (6) Product Images

Show Fewer Product Images

Videos

Show All (1) Videos

Show Fewer Videos

etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
SCHEDULE AN INSTALLATION
go
Quickly and easily install a 4-way trailer connector on your Subaru Crosstrek 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. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56243 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.
  • All Info
  • Reviews (21)
  • Q & A (0)
  • Related Parts
  • Photos

CURT Custom Fit Vehicle Wiring - C56243

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Plug-and-Play Install: T-Connector plugs into existing wiring—no cutting or splicing needed.
  • Ready to Tow: 4-pole flat connector powers trailer signal and running lights.
  • Clean Factory Fit: Hidden wiring design keeps install neat and protected under trim.
  • Powered Converter Protection: Built-in converter isolates trailer load from vehicle circuits.
  • No Tow Package Needed: Works even if your vehicle wasn’t equipped with factory trailer wiring.

Features to know about

Installs Fast Without Cutting: Plug-In T-Connector Design

Wiring a trailer doesn’t have to mean slicing into factory lines. This Curt T-Connector plugs straight into the existing vehicle wiring, creating a secure 4-flat trailer connector without any splicing. It’s purpose-built to match the vehicle’s electrical system so you can get reliable power for running lights, turn signals, and brake lights right away.

Keeps Circuits Protected: Built-In Powered Converter

Modern vehicles use sensitive electronics that need clean, isolated trailer power. The integrated powered converter on this harness protects the vehicle’s circuits from overload and ensures proper lighting function. It delivers consistent current to the trailer lights even when LED or additional lighting is used.

Hidden Setup for a Clean Look: Out-of-Sight Connection

Once installed, the wiring stays tucked behind panels with only the 4-flat plug visible when you need it. The hidden, plug-in layout keeps things neat and reduces exposure to the elements. That means fewer snags and a cleaner finish behind the hitch.

Ready for Everyday Towing: Standard 4-Flat Connection

The included 4-flat connector covers the basics most small and mid-size trailers need—running lights, brake lights, and turn signals. It’s built tough for repeated use and pairs easily with standard trailer plugs so you can hook up and tow anytime.

Specs

  • Comparison image showing multiple Curt T-Connector vehicle wiring harnesses with labeled connectors and wire ends for trailer wiring fitment reference.

56243 Curt T-Connector - Surface Mount Technology - 4 Wire

Installation Details C56243 Installation instructions

This Product Fits The Following Vehicles




Customers Who Purchased This Custom Fit Vehicle Wiring Also Bought...



Customer Satisfaction Score:

Ratings & Reviews

4.9

21 reviews
5 Stars
(19)
4 Stars
(2)
3 Stars
(0)
2 Stars
(0)
1 Star
(0)
Review Sort Icon
by:
Perfect! Easy to install, fits my vehicle and works great!
by:
2014 Subaru XV Crosstrek
So today I received my wiring harness in the mail and decided to wire it up to my 2014 subaru crosstrek hybrid touring. I know subaru says (even at my dealership) the hybrids are rated to tow but, I know one other person who tows light loads with their crosstrek hybrid for a couple years now and with no issues at all. I never really thought of towing with mine until recently when I was given a Clam portable ice fishing house. The house wouldn't fit in my car, I decided to look into roof racks but the thought of lifting the thing on top my car was not settling well with me. I decided that a small trailer (which I already have) was the best route for me. Which brings me to present day today. I now have a light tow package on my car capable of towing my trailer and fish house for the winter. So now for the product, overall it was extremely easy to install on my car. The wiring instructions I would like to note only show you how to connect the driver side tail light harness to the vehicle, just pay attention to which harness goes on which side in the instructions and you shouldn't have a problem. I like how it plugs directly into the existing harness in the vehicle. The only thing I found that would require some thinking is how to run the hot wire to the front of your car to connect to the positive terminal. I would submit pictures but I hid my wiring in the guards underneath my car. I also tucked away the wiring and converter pack thing in the truck of my car. Also, when running the trailer connector end and hot lead wire I ran them through the truck to the outside of my vehicle through some grommets to prevent weather getting through and hold them in place. Lastly, of course I tested it on my trailer and everything works great. Now I have to sit and wait til ice fishing season to actually tow my fish house. I would definitely recommend this to another crosstrek hybrid owner looking to tow light loads.
Russell M. profile picture

Russell M.

10/19/2017

the wiring harness is still performing well and I am still happy with my purchase. Thank you for the follow up.

by:
2014 Ford Edge
We installed on a Subaru XV Hybrid with good result. Harness quality is very good, instructions are clear except for 12volt power. Used fish wire from hitch to pull T-connectors up to tail light holes without removing side panels. Mounted electronic modular to back wall of trunk. Removed negative from both batteries to be sure but ran 12volt power to driver side battery. For 12v I went thru grommet in truck under center of rear diff and then along driver side edge under plastic shield as much as possible. I wish instructions gave some suggestion on how to run 12v.
Anthony profile picture

Anthony

7/8/2016

Hitch and wiring have worked out well. I use the trailer about once everytwo weeks and no problems.

by:
Wow. I'm amazed. After spending 11 (yes, not a typo) hoursa at U-Haul and repeatedly asking why they were having so much trouble installing a wiring harness in my Crosstrek Hybrid, I finally asked to see the package. It said EXCLUDING HYBRID!

I hate working on electrical on my vehicles because I'm afraid I'm going to do something horribly wrong and the car will be stranded somewhere far from home. My son and I sat down with the kit, followed the instructions carefully, and BOOM! It works perfectly!

No troubles at all and we were towing a trailer where everything worked properly the very next day. Thank you etrailer! Amazing!
Dave profile picture

Dave

1/18/2022

Still working without issue.

by:
2014 Subaru XV Crosstrek
Wiring was just plug it in was a bit difficult finding a hole to feed it through but all in all.i am happy with it.
by:
2014 Subaru XV Crosstrek
The harness was easy to install and works perfectly. Installed on a 2014 Subaru Crosstrek.
by:
The harness was perfect, very easy to install, great instructions, and fit/connection was perfect!
by:
This was part of a hitch package. All in all I am impressed with the quality of the product and the great customer support.
by:
GREAT PRODUCT! EVERYTHING FITS PERFECTLY!
by:
Fast delivery of an excellent product. I would certainly buy here again. Thank you.
by:
Great product and a great price.
by:
Worked perfectly... thanks!
by:
by:
by:
by:
by:
by:
by:
by:
2014 Subaru XV Crosstrek
by:
21
21
true

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

Do you have a question about this Custom Fit Vehicle Wiring?
  • Correct Trailer Wiring Harness for 2014 Subaru XV Crosstrek Hybrid
    I spoke with Curt and verified that the correct trailer wiring harness for a 2014 Subaru XV Crosstrek Hybrid is the Curt T-Connector Vehicle Wiring Harness # C56243. They said the reason is the other harness is multi-fit for a number of vehicles and this harness is specifically made for the XV Crosstrek & Crosstrek. So according to Curt the issue is simply compatibility as they are essentially different vehicles despite having the Crosstrek title. If you are looking for a hitch for your...
    view full answer...
  • Trailer Hitch Receiver for 2015 Subaru Crosstrek and Tongue Weight Capacity
    I do have thoughts, but start with the trailer hitch receiver fits for your 2015 Subaru Crosstrek if you don't have one yet, for which the best option is the etrailer Trailer Hitch Receiver # e98838. This hitch is very similar, with the same installation and clearances as the other hitches that fit your '15 Crosstrek, the Draw-Tite # 76084 and Curt # C13135, but with a matte black finish that will help hide any scratches to help maintain a clean aesthetic. As for the tongue weight, you...
    view full answer...
  • Trailer Wiring Harness for 2014 Subaru XV Crosstrek Hybrid
    I spoke with my contact at Curt and verified that the information on our website is correct, the T-Connector Vehicle Wiring Harness, # C56040, is not compatible with the Hybrid models and is listed as excluded. However, they do have the Custom Curt T-Connector # C56243 that will simply plug into current wiring and will be easier to install than other kits. This harness will work with the Hybrid model.
    view full answer...
  • Concealed Hitch Receiver For 2015 Subaru Crosstrek
    Thanks for reaching out, I have what you need, see it listed below: **EcoHitch Invisi Trailer Hitch Receiver - Custom Fit - Class III - 2" # 306-X7203. This is a custom fit, hidden crossbar style hitch receiver that will work great on your 2015 Subaru Crosstrek. The curt item you were looking at is not a custom fit for your year make and model. *Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56243. *etrailer 2-3/4" Rise or 4" Drop Ball Mount Kit - 7,500...
    view full answer...
  • Trailer Wiring Harness for a 2015 Subaru XV Crosstrek Hybrid
    We do have a trailer wiring harness that will fit the 2015 Subaru XV Crosstrek hybrid with LED lights but Curt harness # C56243 is not a fit. I checked with my contact at Tow Ready and found that you can use harness # 118467 even on the hybrid models. I have linked a video review of this harness for you as well.
    view full answer...
  • 2 inch Trailer Hitch Recommendation for 2017 Subaru Crosstrek
    For your 2017 Subaru Crosstrek we do have 2 inch hitches available. The Draw Tite hitch part # 76084 fits the hybrid and non-hybrid models so it would be the hitch we would recommend for you. 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 or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage bag. If...
    view full answer...
  • Can a Brake Controller be Installed on a 2014 Subaru Crosstrek
    Yes, you can install brake controller # TK63VR in your 2014 Subaru Crosstrek. If your Crosstrek does not already have a 4-Way trailer wiring harness you would need to start by installing one, # 118467 for non-hybrid models or # C56243 if yours is a hybrid. Then you will need # ETBC7 to add a 7-Way trailer connector and for the wiring and other parts needed to install brake controller # TK63VR. I have included some links that show and explain the ETBC7 installation for you.
    view full answer...
  • Towing Equipment For 2015 Volkswagen Golf SportWagen & 2015 Subaru Crosstrek
    According to my research the 2015 Volkswagen Golf SportWagen towing capacity is around 2000lbs and the 2015 Subaru Crosstrek has a towing capacity of 1500 lbs. Please confirm with your respective vehicle's owners manual before proceeding. In this situation I would go with the car that has the highest towing capacity, which appears to be the SportsWagen, but I will give towing options for both. For the 2015 Volkswagen Golf SportWagen I recommend the Draw-Tite Sportframe Trailer Hitch Receiver...
    view full answer...
  • Does EcoHitch Trailer Hitch Receiver 306-X7203 Fit A 2016 Subaru Crosstrek Hybrid?
    Yes. The EcoHitch Invisi Trailer Hitch Receiver - Custom Fit - Class III - 2" # 306-X7203 you were looking at is confirmed to fit your 2016 Subaru Crosstrek Hybrid. The # 306-X7203 has a 525lb tongue weight rating and a 3500lb trailer weight rating making it a perfect option for carrying a bike rack, a cargo carrier, or a ball mount for towing a trailer. If you are planning on towing a trailer you will also need a vehicle wiring harness # C56243. I included a video review of the # C56243...
    view full answer...
  • Trailer Hitch Recommendation for a 2016 Subaru Crosstrek
    For your 2016 Subaru Crosstrek I recommend Curt trailer hitch # C13135. This is a Class III trailer hitch rated for 525 pounds tongue weight and 3,500 pounds gross trailer weight. Consult the vehicle owner's manual for the capacities of the vehicle and go by the lower rating. I have also included a link to a video showing installation of the hitch on a 2015 Subaru XV Crosstrek as well as a link to the installation instructions. For this hitch the recommended ball mount is # C45230 with...
    view full answer...
  • Trailer Wiring Harness Options for a 2014 Subaru XV Crosstrek Hybrid
    Trailer wiring harness # 119250KIT is a universal wiring harness. It attaches without splicing into your current wiring. You could technically wire it up to anything. But it hasn't been tested on a 2014 Subaru XV Crosstrek hybrid. There is a harness that plugs in line with the tail light wiring on the Hybrid models. It is # C56243 from Curt.
    view full answer...
  • Trailer 4 Flat Wire Harness for a 2016 Subaru Crosstrek Hybrid
    I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Item # C56243 as an option that works for the hybrid of the Subaru Crosstrek. The below installation video is a great help when you're ready to get started. If you don't already have a hitch, the etrailer Trailer Hitch Receiver Class III - 2" Item # E98838 is confirmed to fit and is available in a matte black finish for a nice, less obvious look.
    view full answer...
  • Can etrailer Trailer Hitch for 2016 Subaru Crosstrek Be Installed By 1 Person
    You can install the etrailer Trailer Hitch Receiver # e98838 on your 2016 Subaru Crosstrek by yourself but it does get tricky since the bolts used for the installation are hanging down through the frame and you need to avoid pushing them back up into the frame when raising the hitch into place. Usually when people install hitches on their own they will use jack stands and blocks of wood to act as a second set of hands. You can follow the linked installation video and instructions prior...
    view full answer...
  • Recommended Hitch for a 2014 Subaru XV Crosstrek
    Yes, it does! The etrailer Hitch item # e72AR has been confirmed to fit all models of the 2014 Subaru XV Crosstrek including the hybrids. This hitch is custom fit and bolts to your Subaru with included hardware. This is a class III hitch with a 2" receiver. It has a 3,500 lbs towing capacity and a 525 lbs maximum tongue weight. I have linked an installation video below to help you get it set up. If you are planning on towing you will also need a wiring harness item # C56040 for the...
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.