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 # C56394

lowest price pledge


Our Price: $22.83

You Save: 57%
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: 0.38 lbs

In Stock, Ships Today
C56394 - 4 Flat Curt Trailer Hitch Wiring
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

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.

pop out icon replay 360 icon
horizontal rotate icon

Product Images

In Use/Installed

  • Custom Fit
  • Trailer Hitch Wiring
  • Curt
  • 4 Flat
  • No Converter
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, splicing or tapping required. Call 800-298-8924 to order Curt custom fit vehicle wiring part number C56394 or order online at 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 (5)
  • Q & A (1)
  • Videos (3)
  • Photos
  • Why etrailer?

Curt Custom Fit Vehicle Wiring - C56394

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, splicing or tapping 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 of wires
    • Locate connection point behind driver's-side rear bumper
    • Plug in T-connector
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 7.5 amps per circuit
    • Tail lights: 7.5 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 rear bumper. You will have to lower your muffler to access this harness.

Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within 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.

56394 CURT T-Connector - 4 Wire

C56394 Installation InstructionsInstallation Details C56394 Installation instructions

This Product Fits The Following Vehicles

2018 - 2019 Buick Enclave

2018 - 2020 Buick Enclave

2018 - 2020 Chevrolet Traverse

2018 - 2020 Chevrolet Traverse

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 - 2018 Chevrolet Traverse

Speaker 1: Today on our 2018 Chevrolet Traverse, we're going to take a look at and show you how to install the Kirt 00:00:05 T-connector vehicle wiring harness with the four pole slat trailer connector, part number C56394. Now, this is what your wiring is going to look like once you get it installed on your vehicle. As you can see, we're using a four poled bracket here that allows us to have a firm attachement point for our wiring. Now, if you don't want a bracket, you do have the option of coming down and around your hitch, and then we can use that dust cover just to hold it up and in place.Here's what our wiring kit is going to look like. This is going to be a very straightforward and easy installation for you to do. Basically, we have our factory connector right here.

It's located on the back of your vehicle. We'll show you where that's at. We're going to plug that in, and then the only thing we have to do is run up the length of wire over to where we want to use it, so around the receiver tube of our hitch. This gives us a four flat trailer connector on the rear of our vehicle, which we can use for our utility trailers, cargo carriers, or really for that matter any other trailer that has a four flat connector on it.Also with your kit you're going to have dust cover. This is going to allow you to protect your connection here.

So we're going to bring that down and over. Let's bring it around. This will help to keep out any moisture, any debris which might cause corrosion.Now, this first step in our installation is going to be to remove the rear cover here. It's just going to have the two tabs that you'll turn. We can pop that section down and that will come off for us.

Next thing we need to do is find our plug. It's going to be right in behind this panel, right up against the back of the vehicle. So you can reach in here and you should be able to get your hand on it right above your exhaust. Now it has a Christmas tree fastener or a push pun fastener, so typically if you just pull out on that we can get it to come down just like that. And you're going to pull down on the red tab, press in on the black tab, and wiggle it to separate.

You can see it's going to match our wiring connector.And we'll take our dielectric grease, get some in our socket there. Now we'll feed the four pole flat trailer connector from our plug side here over towards our hitch opening. We want to stay up nice and high. We want to go up over our brace here. That will keep us away from our exhaust area. All right, we'll just let that hang out there now. We'll put our plug together over here. And as we slide this together, you want to just listen for the click and you want to pull test it, and we can just lift that right back up in and take all of our slack out of the other side.Now, we're going to be installing a four pole bracket here, our customer's requested that just so he doesn't have to wrap it around his hitch or something like that. This is part number 18144. It will have the hardware provided to attach it to a bracket. Now, we'll be able to just pull our wiring in, tip it down, you see that's going to give us a nice, fixed location. The excess wire we'll just zip tie off. We're going to be using a little bit longer zip tie than what comes with the kit, just so we can get all the way around the hitch.Now as I get this put in place, I like to have the dust cover on it. Bring that in, tip it up so it's held, and we can put our cover on and keep it protected. As you can see with our wiring installed, we're still able to put our panel back on and keep everything nice and clean.For the test out our wiring, we're going to use Kirt 00:03:49 tester, part number I26. Just going to plug that in, and you can see the LED lights here flash as we go through the different lights. Now we'll start our test with our running lights. Now our left blinker. Our right blinker. And our brakes. Now with everything working properly, that's going to complete our installation of the Kirt T-connector vehicle wiring harness with the four pole flat trailer connector, part number C56394.

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56394

Average Customer Rating:  5.0 out of 5 stars   (5 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, splicing or tapping required.

- C56394

Easy to install and worked as it should 671598

- C56394

Perfect fit, good price 580605

- C56394
2018 Chevrolet Traverse

Plugged right into factory connector. Just removed cover on connector. Very easy on my 2018 Traverse. 556363

- C56394
2018 Buick Enclave

I ordered this trailer hitch wiring harness for my 2018 Buick Enclave. Website was excellent.. simple and direct. Product arrived as scheduled and the instructions were very good. Installation was exactly as shown. I would definitely order from etrailer in the future. 549838

- C56394
2018 Chevrolet Traverse

Exactly what I needed. Thank you. 500545


Ask the Experts about this Curt Custom Fit Vehicle Wiring

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

  • Towing Capacity for 2018 Chevy Traverse AWD
  • 5,000 lbs appears to be the weight capacity of the 2018 Chevy Traverse if it has the 3.6 liter V6 engine and 1,500 lbs if the engine is the 2.0 4 cylinder. Those figures are the fully loaded capacity that your truck can tow. If you are going to be at the capacity of vehicle a weight distribution system would be recommended. For that I recommend the Strait Line part # RP66082 which has a tongue weight range of 200-600 lbs and features the best sway control designed to fight sway before...
    view full answer...

  • Why

    At 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

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

Info for this part was:

Edited by:
Lindsey S
Video Edited:
Jacob T
Video Edited:
Chris R
Installed by:
Cole B
Test Fit:
Randy B
Test Fit:
Robert C
Written by:
Amanda M
Video by:
Zach D
Video by:
Jonathan Y
Updated by:
Kristina F
Updated by:
Isabelle B

At 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.

Product Experts Available Now!

Call 800-298-8924