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

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

Part Number: C27BR
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$77.53
Retail:$106.95
You Save: 28%
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. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C27BR 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.
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  • Reviews (143)
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CURT Custom Fit Vehicle Wiring - C27BR

  • 4 Flat
  • Trailer Hitch Wiring
  • No Tow Package
  • Vehicle End Connector
  • CURT
  • Plug-In
  • Powered Converter
  • Plug and Lead
  • Hidden

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 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


Specs:

  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • 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 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 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.



56473 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C27BR Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.7

143 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.

by:
2023 Jeep Grand Cherokee 4xe

The quality is great! And all the parts were correct and arrived fast!
Install took a little longer than 2.5 hours as my husband and son had to redo the wiring. They did follow the video which helped a lot!

Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

3/11/2025

Your husband and son did a great install! What are you going to be towing?



by:
2024 Jeep Grand Cherokee L

Works as described and the install videos were an amazing step by step. If I could give 4.75 stars i would because the power wire was short about 6 feet and I followed the video to a T.



by:

Top quality!, delivery was spot on, no delays. The folks at etrailer stayed in contact with me from day one, answered all my questions and I truly appreciated this!, the how too videos are awesome and extremely helpful as well

Brooke M. profile picture
Etrailer Expert

Brooke M.

5/13/2025

Really glad to hear that! Let us know if we can help with anything else in the future :)



by:

Easy to install, only wished you offered a wiring harness for a 8 pin plug. But overall I like the product.



by:

Trailer hitch fit well, new cross member much
Thicker and heavier than one removed. Mst remove rear bumper
For acess. This took me 18 hours to install.



by:

Perfect fit, wiring harness and hitch. Directions were very clear, and installation was simple.



by:
2023 Jeep Grand Cherokee

Wiring harness made the project so much easier! Fast shipping, great customer service! The video tutorials were immensely helpful. Got a little stuck on running the hot lead, since everything is so tight under the Jeep, but we figured it out.



by:

wiring works fine-I wish there was an easier way to get to the battery-Or start bleeding in to lighter adaptors that most vehicles have-You've got installing hitches down pat, though!



by:
2022 Jeep Grand Cherokee 4xe

Installed just like the video describes. Thank you



by:
2025 Jeep Grand Cherokee

Installation was smooth since I had to take off all the body cladding to install the trailer hitch.



by:

Great prompt service identifying the harness needed and delivery!



by:
2023 Jeep Grand Cherokee L

Exactly what I wanted. A quality harness that is built to last.



by:

Have bought two hitches from etrailer. In both cases, the right product and great support. For sure, I will buy the hitch from my next car here.



by:

This is a well made wiring harness. Install is a bit involved but everything fit perfectly.



by:

Great products at competitive prices. Video was very helpful! Everything exactly as promised. I am a returning customer.



by:

Harness worked just as explained in the included install specifications.



by:

Awsome , fast delivery and great videos for installing



by:

I just received and installed a class 4 hitch on my 2022 Grand Cherokee Laredo L and as usual it was easy to install, and as usual the hitch is top notch. This is my 5th hitch I've purchased through the years and I will purchase all my hitches from etrailer. In fact I'm about to purchase number 6,thanks for the great products.



by:
2021 Jeep Grand Cherokee L

Package was in the same bad as hitch, but everything was there, so what do I care. I’ve been using solder seal shrink wrap but end connectors. Heat gun melts solder and shrinks wrap. Routing power wire to battery is not for the faint of heart, but I knew what I was getting into. Service was fantastic. Ordered Tuesday and had it on Thursday!



by:

Great wiring harness. Easy to install when installing a trailer hitch and quality made.



by:
2022 Jeep Grand Cherokee L

This wiring harness is great, all the connectors fit and watching the installation video helped save time and headache figuring out how to route the power wire to the battery. Plan for a few hours to install it, I installed mine while also installing the receiver hitch which makes access easier. Thank you etrailer!



by:

Still working without issues. Installation was just as the video displayed. Solid product one year on!



by:

Great hitch fairly easy to install. About 4 hours. Nice step by step instructions and good videos on line. I highly recommend. Just take your time step by step and you will succeed.



by:

Joanne K was a wonderful help. Very knowledgeable and found exactly what I was looking for. Helped me purchase 2 trailers and arrived sooner than expected. Hope to be purchasing more soon. Thanks again



by:
2024 Jeep Grand Cherokee

Good kit, works perfectly. Running the cable to the battery is a pain but really not too bad since you can fit under the Grand Cherokee without having to lift it.


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143
Show More Reviews

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    Hi Tyler, From what I can find you got the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55124 which is not a fit for a 2024 Jeep Grand Cherokee L, it is a fit for some Jeep Wranglers up to 2018. Instead, the correct 4-way wiring harness for your 2024 Jeep Grand Cherokee L (assuming you do not have the factory tow package) is the following: - Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C27BR
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Jonathan Y
Video Edited:
Jonathan Y
Employee John S
Video Edited:
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Employee Wilson B
Updated by:
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Employee David F
Test Fit:
David F
Employee Jacob H
Test Fit:
Jacob H
Employee Ryan G
Test Fit:
Ryan G
Employee Ian F
Test Fit:
Ian F
Employee Scott A
Test Fit:
Scott A
Employee Andy C
Installed by:
Andy C
Employee Thomas T
Video by:
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Employee Schuyler H
Video by:
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Employee Sabrina W
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