1. Custom Fit Vehicle Wiring
  2. Curt
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Powered Converter
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 # C56259
lowest price pledge
Retail:$73.15
Our Price: $46.69
You Save: 36%
Custom Fit Vehicle Wiring

Will this fit?

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

Orders above $99 qualify for Free Shipping
Shipping Weight: 1.78 lbs
*Attributes in bold are required.
In Stock, Ships Today
Curt Trailer Hitch Wiring - C56259
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

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

In Use/Installed

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. Call 800-298-8924 to order Curt custom fit vehicle wiring part number C56259 or order online at etrailer.com. Free expert support on all Curt products. Guaranteed Lowest Price 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 (11)
  • Q & A (16)
  • Videos (3)
  • Photos
  • Why etrailer?

Curt Custom Fit Vehicle Wiring - C56259

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

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.


Features:

  • 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 powered tail light converter that 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


Specs:

  • Limited 1-year warranty


Installation

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 trunk floor coverings and rear scuff panel and pull back on the trunk liner to access these connection points. 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 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.



56259 Curt T-Connector - Surface Mount Technology - 4 Wire

Installation Details C56259 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Curt T-Connector Vehicle Wiring Harness Installation - 2019 Subaru WRX


Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56259

Average Customer Rating:  4.7 out of 5 stars   (11 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.

- C56259
by:
2017 Subaru WRX

Quick shipping and excellent packaging. Since I already have a sub in my trunk, this product was extremely easy to install. Otherwise, you will need to run a wire from the battery to the trunk (which can be mildly difficult if you've never done it before). This wire ensures the trailer lights don't overload your taillights (possibly causing a fuse somewhere to blow or a dimming effect in your taillights). If you don't want to run a wire to the battery you can just tap off one of the tail lights and carry a replacement fuse lol (I'm an electrical engineer). I highly recommend this product. 487575


Comments
Brandon, Thank you for your review. We do not recommend running the power wire to any other source besides the vehicle battery to avoid overloading your vehicles electrical system. Not all vehicles can handle powering trailer lights and has to draw the power from the battery. I have attached a link to help with routing this power wire.
-- Heather A - 03/22/2018

36315

- C56259
by:
2017 Subaru WRX

The kit was fantastic. It works well and includes plenty of bits and bobs needed to perform the install. The quality of the parts seem great, and time will tell if it holds up but I've no reason to think it won't be bulletproof for the life of the vehicle. Why not 5 stars? Well, for me, having a 2017 STI, there was no way I was going to run a 12v power line under the chassis. I opted to route through the firewall using Perrin 1.5" grommets, Mishimoto sound tube delete kit, and run the power wire under the interior panels to the trunk. I did this by crossing from driver side to passenger side, and by the time I reached the trunk, I was about 4 feet short of cable. So, I took off a star for that darn power cable being a bit too short for an installation like mine. But, if you're doing it some other way, maybe you won't need more than the length provided. Great kit. Will buy again for my next STI in 3-5 years. 408501


Comments
Sold the STI after 3 months of ownership. It was too small and even with a trailer hitch to tow our gear, the gas tank was too small. Sold it and bought a Jeep Grand Cherokee Trailhawk. Couldnt be happier.
Alex S - 07/20/2018

41203

- C56259
by:

Easy to install. Great product, perfect fit. Used it to move from NC to CO pulling a 5' X 8' trailer. 714119



- C56259
by:
2018 Subaru WRX

Very fast delivery 639372



- C56259
by:

Was very easy to hookup. Running the power wire is the hardest part. I have an amp and sub in my trunk so I was able to just tie into that power wire instead of running to the battery. Well worth the money. 639171



- C56259
by:
2015 Subaru WRX

I’ve never took the time to make a good review on a company, but this company I felt deserved it. etrailer took the time verified and changed my order after I already paid to make it correct, speedy shipping, easy install instructions, great quality product. Couldn’t have asked for a better experience. 541699



- C56259
by:

Installation was fairly easy. 523312



- C56259
by:
Saturn Relay

This install is not for the faint of heart. To do a clean install I had to remove all of the plastic trim down the drivers side of the car, partially remove the fuse box and relay box under the dash and cut a slit in the carpet above the clutch. Total install time was about 8 hours to complete. The instructions also say to just drape the 4 prong wire out of the trunk when towing which is not an acceptable method of wire routing. I do recommend this product, but consider having a professional install it. Beyond the install, the harness works as intended and is unobtrusive when installed. 436461



- C56259
by:
2015 Subaru WRX

We had Jason's auto and tire install for us, they had no problems with installation. 353198



- C56259
by:

Great product, and even more importantly, great company (etrailer)! I was under a time crunch, and Melinda was incredibly helpful. She ensured that the shipment went out the same day I ordered and was delivered via next day air. Wonderful customer service! I highly recommend both Curt products and etrailer! 225448



- C56259
by:
2015 Subaru WRX

Great packaging, great instructions. The receiver is very beefy with a great quality powder coat finish. For this intermediate level mechanic, installation time was exactly what was promised. Easy order, good pricing, and quick delivery. Good Job! 184730


11
11

Ask the Experts about this Curt Custom Fit Vehicle Wiring

  • Trailer Hitch and Wiring for 2017 Subaru WRX
    There is a wiring harness available for your 2017 Subaru WRX, the Curt T-Connector Vehicle Wiring Harness # C56259. This will give you a 4-flat connector and will simply plug in to your Subaru's connection points behind the tail lights. I've added a link to a video review of this prodcut as well as a link to an installation video. For the hitch I recommend the EcoHitch # 306-X7257, though this will only fit if your WRX has the center knock out panel in the lower rear fascia. This is...
    view full answer...
  • Routing a Trailer Wiring Harness Power Wire to the Battery on a 2016 Subaru WRX
    There are several different methods you could use to route the power wire from Curt trailer wiring harness # C56259 to the battery on your 2016 Subaru WRX. The first step is to find the best exit point from the trunk/cargo area. There are 2 paths you could take. First, you could check for a grommet or some exit point beneath the flooring through which you could route the wire. Or you could come into the cab of the vehicle from behind the rear seats. The next steps are going to...
    view full answer...
  • 4-Way Trailer Wiring Harness to Fit 4-Way on Trailer
    Yes, the 4-way that comes with the # C56259 that you referenced is the same style of connector in the picture that you sent me. On your trailer is the male side and with this harness you would have the female side to connect to it. Everything else you mentioned would work just fine with your trailer.
    view full answer...
  • Can Power Wire for Curt Wiring Kit # C56259 be Connected to 12V Power Outlet on 2012 Subaru Impreza
    Although that would make things easier you really do need to route the power wire that comes with the Curt T-Connector # C56259 up to the battery on your 2012 Subaru Impreza. This wiring kit is designed to function independently of the OEM wiring on your Impreza so if you were to connect this to a 12V outlet then if something went bad on your trailer it could leak over to your vehicle. We also don't know what else this outlet is connected to so it may be very easy to bust a fuse and then...
    view full answer...
  • Is Wiring Harness Included with EcoHitch Trailer Hitch for 2015 Subaru WRX
    The EcoHitch Invisi Trailer Hitch Receiver # 306-X7257 for your 2015 Subaru WRX does not include a trailer wiring harness or pin and clip. It is simply the trailer hitch and the needed hardware to install it. None of our trailer hitch receivers include the wiring harness needed for towing. To add a trailer wiring harness I recommend the Curt T-Connector # C56259 that will plug right into factory ports behind the driver and passenger side tail lights. You will also need to run a hot...
    view full answer...
  • Towing Capacity of EcoHitch Trailer Hitch Receiver on 2017 Subaru WRX STI Limited
    The EcoHitch Invisi Trailer Hitch Receiver - Custom Fit - Class III - 2" # 306-X7257 is a great fit for your 2017 Subaru WRX STI Limited. It is rated for towing up to 3,500 lbs but Subaru does not recommend towing with your vehicle according to the owner's manual. Many customers have chosen to tow small trailers anyway and we have not heard of issues but it would be at your own risk. If you decide to tow your 16 foot jon boat with this vehicle, you will need the Curt T-Connector Vehicle...
    view full answer...
  • Hitch Recommendation for a 2015 Subaru WRX STI
    Yes, I spoke with my contact at Curt and the Curt Hitch part # C11408 that you referenced has been confirmed to fit the STI versions of the 2015 Subaru WRX so it will work for you. For a ball mount you would want part # C45521, 1-7/8 inch hitch ball # 19256, 2 inch hitch ball # 19258. For trailer wiring you would want the part # C56259.
    view full answer...
  • Trailer Hitch and Wiring for a 2016 Subaru WRX Limited
    I checked with Curt and trailer hitch # C11408 is indeed listed as a fit for your 2016 Subaru WRX Limited. There is one picture from the instructions which I have added for you. I have also linked the instructions. You will not have to remove the bumper to install the hitch. If you plan on doing some towing the correct ball mount is # C45521. For a 1-7/8 inch ball use # 19256 and for a 2 inch ball use # 19258. And for trailer wiring you can use # C56259 to add a 4-Way flat connector. If...
    view full answer...
  • Parts Needed to Tow Motorcycle Trailer with 2016 Subaru WRX
    Only option would be to tow a small trailer for the motorcycle. There are no hitches available that have the needed capacity to carry a 400 lb motorcycle and carrier. The Curt Class I hitch part # C11408 is a fit for your vehicle and would work well for towing a lightweight trailer as long it weighs less than 2k loaded. I attached an install video for this for you to check out as well. For trailer wiring you would need the part # C56259 which is a confirmed fit. For a ball mount...
    view full answer...
  • Hitch Recommendation for a 2015 Subaru WRX
    Yes, I spoke with my contact at Curt and the Curt Hitch part # C11408 that you referenced has been confirmed to fit the 2015 Subaru WRX so it will work for you. The hitch will hang below the rear bumper when installed. I attached a picture that shows this hitch installed as well. For a ball mount you would want part # C45521, 1-7/8 inch hitch ball # 19256, 2 inch hitch ball # 19258. For trailer wiring you would want the part # C56259.
    view full answer...
  • Does Exhaust Need to Be Lowered To Install Trailer Hitch on 2015 Subaru WRX
    I'm assuming you're wondering if the exhaust of the 2015 Subaru WRX needs to be altered in order to install the Curt Class I trailer hitch, part # C11408, is that correct? According to the instructions, which you can look over by clicking the provided link, the exhaust will need to be temporarily lowered out of the way during installation, and the heat shield will be temporarily removed so a small hole can be cut in it. If you'll be towing with your WRX, you'll also need the following...
    view full answer...
  • Do I Use Hitch Tongue Weight Capacity or Vehicle Tongue Weight Capacity
    When it comes to towing, you are always going to be bound by the component with the lowest capacity so even though the hitch can handle more weight, your vehicle can not. Since you mention that the tongue weight capacity of your vehicle is 165 lbs, a 280 lb power chair would exceed the tongue weight capacity and could cause damage to your vehicle but I do have a solution. The best solution would be to buy a lightweight trailer to transport your power chair. The hitch that we offer for...
    view full answer...
  • Trailer Hitch and Wiring for a 2016 Subaru WRX
    Curt trailer hitch # C11408 exits under the rear fascia on the 2016 Subaru WRX. It does not exit through any factory access panel. I have included a link to the installation instructions for you to look over. The receiver and the cross tube will be visible under the rear fascia. If you decide to go with this hitch then the correct ball mount to use is # C45521. For a 1-7/8 inch ball use # 19256 and for a 2 inch ball use # 19258. And for trailer wiring use # C56259 to add a 4-Way flat...
    view full answer...
  • Trailer Hitch and Wiring fof a 2015 Subaru WRX
    For your 2015 Subaru WRX you can use Curt trailer hitch # C11408. If you plan on doing some towing the correct ball mount to use is # C45521. For a 1-7/8 inch ball use # 19256 and for a 2 inch ball use # 19258. For trailer wiring use # C56259. If you want to use the hitch for an accessory such as a bike rack or cargo carrier then you have to make sure the accessory is rated for use with a Class I trailer hitch. Also, with a bike rack, you are limited to 2 bikes maximum on a Class I hitch. Curt...
    view full answer...
  • Trailer Hitch and Wiring for a 2015 Subaru WRX
    The Curt trailer hitch # C11408 will not be concealed behind the rear fascia of your 2015 Subaru WRX. The cross tube and receiver will be visible beneath the rear fascia. Take a look at the installation instructions I have linked that shows some pictures of the hitch position. If you plan on doing some towing the correct ball mount to use is # C45521. For a 1-7/8 inch ball use # 19256 and for a 2 inch ball use # 19258. And for trailer wiring use # C56259. If you will be using the...
    view full answer...
  • Recommended Trailer Hitch and Wiring for a 2019 Subaru WRX
    I recommend using the Curt Trailer Hitch Receiver # C11408 along with the Curt T-Connector # C56259 because I like the way the squared Curt hitch looks on the WRX over the round Draw-Tite version. The Curt trailer hitch comes with a limited lifetime warranty and is assembled in the USA, and the T-Connector is the corresponding wiring kit for your 2019 Subaru WRX. I have attached install videos and a few pictures of this hitch installed for you to reference. To complete a towing setup...
    view full answer...

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




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality custom fit vehicle wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Michael H
Expert Research:
Jameson C
Video Edited:
Joshua S
Video Edited:
Jacob T
Written by:
Laura H
Updated by:
Sarah W
Updated by:
Kristina F
Updated by:
Isabelle B
Test Fit:
Brent H
Test Fit:
Ryan G

At etrailer.com 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.