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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Item # C55384
Our Price: $35.02
You Save: 13%
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 7-way OEM tow package wiring harness - no cutting, splicing or tapping required. 1-800-496-5010 to order CURT custom fit vehicle wiring part number C55384 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (547)
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CURT Custom Fit Vehicle Wiring - C55384

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • No Converter
  • CURT

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into 7-way OEM tow package wiring harness - 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
    • Designed for use with a factory tow package that has a 7-way connector
    • Retains 7-way connector functionality
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points behind rear bumper
    • Plug in T-connector
  • Comes with dust cap for 4-way flat connector
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's factory tow package wiring harness, which is located behind the rear bumper. Simply plug the harness in-line with your existing 7-way wiring harness.

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.

55384 CURT T-Connector - OE 4-Flat Upgrade

Installation Details C55384 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - C55384

Average Customer Rating:  4.9 out of 5 stars   (547 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into 7-way OEM tow package wiring harness - no cutting, splicing or tapping required.

2018 Jeep Grand Cherokee

Part worked perfectly for my 2018 Jeep Grand Cherokee. Plug and play at its best, although I understand I will need to take this to a Jeep dealer to have it scanned to operate the trailer lights.

The wiring harness is still going strong without any problems after a year. Still disappointed in Jeep for charging a ridiculous amount to to scan the car to operate the trailer lights.
Peter A - 08/09/2022

2014 Hyundai Accent

Great product, easy plug and play installation, no need to disturb factory wire harness, using it to supply power to my new bed topper third brake light and accent lighting.


This could not be any easier then this harness, just plug and play.

Thanks fi


Fast shipping and delivery. Easy to install (10 mins), works perfect. Exactly what I wanted and needed to split the factory wiring harness behind the bumper for after market tail-gate light bar. Highly recommend to anyone needing a wiring harness T-connector or additional flat4.

2021 Jeep Gladiator

bought to plug my light bar in my jeep gladiator. took longer to open package then to plug in. less then 5 minutes! complete plug and play, i couldnt be any happier with my purchase! harness is of great quality looks oem like original equipment. fast service from etrailer with the right part 1st time! highly recommend !!!

working great no problems at all love this product could not be happier
Fred - 01/17/2022


At the time of my purchase I could not even buy one in my local area and this was the best deal I found online when I received it is high quality easy installation everything fit perfectly great product would recommend it to anyone thank you

2018 Dodge Ram Pickup

I installed my Curt T-Connector today to my 2018 RAM 1500 Sport 4x4 Crew Cab. The mileage on the truck is at 10679km's. Although warned that the spare tire might require removal (via web site info from fellow RAM owners) that was not the case as there was enough room to remove the OEM connector (which is the short end of the assembly) from the factory housing. The actual disconnect and re-connect took only a couple minutes. I spent a about 15 or 20min's trying different wiring run routings for the aux. four connector plug wiring run. Some tie-wraps where installed to snug things up out of the way and I was done. I also dosed the connections with a shot of Krown 77 lube/rust inhibitor. I'm in the "Great White North" so salt use on roads is a given during the winter months. A quick test run of the lights and I was done. The build quality of the T-Connector is very good..equal to OEM or better I'd say.

2020 GMC Sierra 1500

Very easy to use, hardest part is getting under the vehicle, I have used to connect the light bar, install time 5-10 minutes, comes with zip ties, very happy with results.

2016 Jeep Grand Cherokee

Easy install but buy beware. Vehicle may have to be programmed to turn on trailer light to work. Kinda a monopoly to have to go to dealer and have this done


I installed an aftermarket rear bumper, after which my my wiring harness wouldn’t reach. This extension was exactly what I needed and it works great!

Jeep Grand Cherokee

Order arrived timely and was packaged well. Price point was reasonable for the items. All parts and fasteners were included and of good quality. Instructions were included that made the installation simple. I also found a [online] video that showed the installation on my exact vehicle (Jeep Grand Cherokee) which made the installation a perfect match. Parts installed exactly as shown in the [online] video.

2016 Jeep Grand Cherokee

I just got the delivery.. not putting it on until next week... box did have 2 holes in it.. besides the handles... everything looks like it is complete... quick delivery..was able to follow where it was in shipment...pleased so far...


Was exactly as stated in description. Just unplugged old plug and plugged in new one. I had two plugs to replace and added an extra "T" plug for another 4 prong. It only took less than 15 minutes to install all 3. Customer service is wonderful. Everything I have bought from ETrailer is top notch and delivered on time or earlier.


Awesome!! I bought an OPT7 triple LED light bar for my Chevy Colorado and I didn’t want to splice wires or lose a whole lot of time trying to figure out how to wire it up so I googled and I came across a gentleman who used this product and Im very thankful for this connection and my light bar works smoothly and I have full use of the reverse camera AND I don’t have any wire mess outside or underneath my truck! Easy to install, my first time doing this and it literally took me about 2 minutes, if that! Definitely would recommend this product to anyone with a truck!! Thank you guys!!


Install was pretty straight forward, plug and play, only 1 wire i had to route to the battery up front. I put this on my wife's 2020 Grand Cherokee along with the curt aftermarket hitch since the car had neither. Easy install of less than 1 hour. So far no issues with anything!!

2013 Jeep Grand Cherokee

Order class iii hitch and wiring harness for my 13 keep grand Cherokee . Came next day. Installed in 20 minutes. Great product. High quality and easy install

Product was shrink wrapped, taped and boxed ver professionally. Website also very easy to use

Would definitely recommend to anyone


Helped me put lights on my mudflaps and still allow me to hook up my trailer.


This is a great vehicle to trailer wiring harness just plug it in and you're ready to go and that's all they are to it plug and go and I recommend it.


This T-Connector is working great. Installation was simple. It was truly plug n play.
I used it to connect a LED light bar on back of truck; allowed me to install the light without using the existing trailer connector, so it is still available.

2008 Chevrolet Silverado

Bolted right up to original hitch that rusted away on my 2008 Chevy Silverado. Harness that came with it was different than my original I was unable to use it. My harness was fine so I just saved it for another day. Shipping was fast and convenient.

2013 Chevrolet Avalanche

Easy to install works great shipping and communications was fantastic. Now my USMC LED light hitch cover is on the truck without an adapter.


East to install, works great for my uses

Dennis - 08/12/2022


Fast shipping! Great price!

2011 Chevrolet Silverado

Took less then 5 min to install, solved the hassle of going to a brand name shop and paying 5 to 6 times to have them install. Plan on towing a utility trailer my wife and I do a lot of antique shopping. Will tell all my friends, great product


Quick shipping, Great Deal..

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