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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 # C56367
Our Price: $56.37
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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. 1-833-496-1390 to order CURT custom fit vehicle wiring part number C56367 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 (16)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

CURT Custom Fit Vehicle Wiring - C56367

  • 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 points behind tail lights
    • 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 behind the driver's-side and passenger's-side tail lights. You will have to remove the storage trays, the scuff panel, the interior side panel, and the tail light assemblies 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 trunk.

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.

56367 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C56367 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 Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56367 Review

Today we're going to be taking a look at a Curt T-Connector Vehicle Wiring Harness with a four pole flat trailer connector. This product fits certain years of the Subaru Impreza. To ensure that this is a fit for your vehicle you can always use the vehicle fit guide located at This unit's going to provide a four way flat connector at the back of your vehicle to power your trailer's signal lights. This is compatible with five pole, six pole, and seven pole adapters. Adapters are sold separately.

And it comes with a dust cap for the four way flat connector. That way you can cover up the connection points whenever your plug's not being used. The black box right here is the included tail light converter. This ensures that your vehicle's wiring matches that of your trailer's. Power module connects directly to the vehicle battery through the wiring to avoid overloading your vehicle's electrical system. The unit is constructed using surface mount technology.

It's going to offer consistent, reliable performance. What that does is it maximizes the trailer light yield and intensity while producing minimal heat and it ensures superior operation in rough road conditions. Now it's also designed to connect quickly and easily. It's going to come with detailed installation instructions to walk you through the entire process step by step. Basically what you'll need to do is locate your connection points behind the tail lights.

You're going to have two sets of connectors that you need to get connected. One goes to the driver's side of the vehicle, the other goes to the passenger side of the vehicle. Again, connection point are behind the tail lights. Locate your connection points, plug in your T-connectors. These ports are going to match up perfectly with the plugs on the vehicle and they're going to snap lock together for a nice tight, secure fit. Once you have those connected, you'll need to make a ground connection.

That's your white wire with the ring terminal attached to it. You want to get that grounded to a suitable grounding location with the included grounding screw. Then mount the converter box to a safe, out of the way location. You can do that using the double sided adhesive foam tape that's provided with the kit. You can do it with some zip ties, whatever works best for your situation. After you have that done, you'll need to run the power lead to the vehicle battery. That's your hot lead right here. Black wire, this black wire gets connected to one end of the bundle with one of the included butt connectors. The other end of the wire runs the vehicle battery, gets connected to one half of the fuse holder with another butt connector. The other half of the fuse holder gets a ring terminal attached to it and connects to the positive post of the vehicle battery. It does come with your 10 amp fuse, goes directly in there, and it's got the cap that goes over to keep it safe and protected. Once you have that done, you can secure any excess or slack in your wiring with the cable ties. Once your installation's complete, the four way connectors are going to be stowed in an out of the way location within your trunk. It is recommended that you use a small amount of dielectric grease in all your electrical connections, like the plugs on your vehicle or the four pole connector itself. Applying the grease to those areas are really going to help prevent corrosion to the connection points. That grease is available and sold separately here at When it comes to the maximum amperage for the stop and turn lights, we're looking at three amps per circuit, for the tail lights we're looking at six amps per circuit. I do want to point out that this kit comes with sealant. This is designed to seal the cut that's going to have to be made in a grommet to patch through your wiring. So you can apply this to the grommet, you can seal that up, and then you can seal the area around all the wires as well. But that is included with the kit to get that job done. That's going to do it for today's look at the Curt T-Connector Vehicle Wiring Harness with a four pole flat trailer connector.

Customer Satisfaction Score:

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56367

Average Customer Rating:  4.6 out of 5 stars   (16 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.


I had my mechanic install the harness and he said it was an easy install. He also mentioned that it was a very high quality harness. we have not had any issues with the harness. works great.

Subaru Outback Wagon

The vehicle we put the wiring & hitch on was a Subaru Impreza and it worked out great. We now have an Outback and are trying to decide if we will need a hitch & wiring for it too. Will let you know.

2018 Subaru Impreza

Easy to use, all laid out for install. I recommend watching a YouTube video because it is a lot of wires.


Great support, thx


It's a complete product. Everything went in according to the directions and I didn't need anything extra.


Works perfectly

2019 Subaru Impreza

Much more difficult than other harnesses I have installed, due to the need for a direct connect to the battery. The instructions provide NO help for where to route the hot lead the length of the car, and the video has no details either. This is the most difficult and time-consuming part of the install, and neither Curt nor etrailer provide any guidance. Very disappointed.

We do have a help article that explains how to route the power wire of your wiring harness. I have provided a link for your reference.
-- Etrailer Expert Rachael H - 07/19/2019

2017 Subaru Impreza

Install went well as I am familiar with my car. I ran the power wire internally under the interior trim and through the fire wall to the battery to prevent weather exposure as I live in Maine. The instructions should be more car specific to help those not quite as familiar with their cars. Overall the quality is very good and wire lengths were spot on. I would highly recommend this product! Subaru Impreza has a wire channel drivers side under the door sill trim plates which works perfect for this install. All parts required for the install except tools came in the kit. I will be a repeat customer!

2017 Subaru Impreza

Installed on my 2017 Impreza hatch. Was a bit of a pain to find a good place to run the 12g wire to the battery but other than that it was relatively simple and straight forward. I ended up using some metal loom clamps and zipties to run the wire underneath the car. I am very pleased with the product, Thanks Etrailer.


Very happy to say when. hooked up my boat trailer this spring to start a new fishing season all my lights were working. So far everything very good!

2019 Subaru Impreza

Very high quality product. Installation went exactly as described in the instructions. The reason I keep coming back to etrailer is because of their customer support and instructional videos.

2017 Subaru Impreza

I gave it three stars because of the power wire everthing else was simple plug and play.


bolted right up and haven't had one iss ue

2020 Subaru Impreza

The harness works great. Pretty self explanatory to install. Took me about 2 hours start to finish.

2018 Subaru Impreza

Come with everything needed
Great p



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

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Dustin K
Video Edited:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Amanda M
Written by:
Amanda M

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