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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
In Stock
$83.52
Retail:$115.95
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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CURT Custom Fit Vehicle Wiring - C27BR

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

Similar to Tekonsha TK39VR

Installation Details C27BR Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.7

207 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:

The install was easy following the videos. The wiring was the most difficult part, had to run a wire from engine bay to hitch. If anything was a little lacking, was the wiring video. But overall a great product.



by:

It was pretty much plug and play except for for running wire up under hood for power. The drawtite hitch I will be using has a provision for trailer plug mount, but to get the plug to the provision via the shortest path from the taillight caused a concerning amount of tension, so would recommend adding a couple of inches to the four pin connector to give a little more flexibility in placing the connector on the hitch assembly. This is and the lack of shrink tubing to waterproof the butt connectors is the only reason for 4 stars.



by:

Plugged right in. etrailer’s DIY videos were a great help.



by:

Had this installed by a professional body shop that had proper tools and know how. Tool them a little over 2 hours to install hitch and wiring. This particular wring configuration has to have a hot wire run to battery area. Excellent product, quick shipping and fair price.



by:

Almost plug and play! No need to cut any factory wires which was a huge plus, as well as an incredible video walkthrough that makes install seamless. The only wiring you need to do is for the power wire, but all wiring and connections are included. Very easy install.



by:

Very easy installation and works great with my little boat trailer and utility trailer. Little challenging feeding the power wire to the battery but got it done.



by:

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:

Works well, installation was more work than expected but we got it done with no problems, just a little more time than expected.



by:

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:

Fast service and great help

Mike L. profile picture
Etrailer Expert

Mike L.

2/18/2026

Thanks for the kind words Leo, we're glad we could help. Thanks for your business!!



by:

Got here fast, was easy to install. I have bought several things from this company over the years and their customer service is the best!



by:

Followed along with the video… dropping the line through the grommet was a lot more difficult than suggested in the video. Also, butt splicers that come with this kit are terrible.



by:

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:

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:

well I haven't tried to install yet that's tomorrow. Fast delivery
thank you



by:

Super easy install worth every penny



by:

Always topnotch service and excellent p roducts



by:

Installed over a year ago, no issues. Took a little while to install but instructions are clear. Would recommend.



by:

Poor quality wire, I certainly did not get my monies worth, must be from China, very disappointed.



by:

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:

Worked like a charm. Easy install. Instructions where sub par. Didnt use them



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!


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207
Show More Reviews

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Info for this part was:

Employee Lindsey S
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