CURT® 55664 - 4-Way Flat and 6-Way Round Custom Wiring Connector

55 reviews|Item # mpn4553773528|Similar Products
Vehicle Specific
  • Please Select Vehicle
Authorized Dealer
$28.69
In Stock (3936) - Ships in 24 to 48 hrs
Authorized Dealer
Have a Question? Ask a Specialist
888-903-4343Live Chat

Vehicle Fitment

MakeModelYear
Ram4500 2011-2022
5500 2011-2022

Product Details

4-Way Flat and 6-Way Round Custom Wiring Connector (55664) by CURT®. Output Type: 4-Way Flat. A CURT custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring. Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where CURT's custom wiring connectors come into play.

Specifications

Output Type: 4-Way Flat

Features

Creates a safe, reliable connection between your tow vehicle and your trailer

Creates a safe, reliable connection between your tow vehicle and your trailer
This CURT electrical connector is designed to connect your vehicle with your trailer. It features a durable, weather-resistant design to help prevent damage from water and the elements. The kit includes dust covers to keep connectors clean when not in use, a slit loom to keep wires contained and well protected, and a metal bracket to securely mount wiring to the vehicle or trailer hitch.

Tested in-house for safety

Tested in-house for safety
With a dedicated engineering facility, located in the heart of the automotive industry, each CURT hitch meets ISO/TS 16949 standard. This ensures the safety and reliability of each hitch design.

Backed by a one-year parts warranty

Backed by a one-year parts warranty
CURT products come with a one-year warranty on components and parts.

Installation

A custom wiring connector uses a single original equipment plug to plug into a special socket provided by your vehicle. Though this option is not available on every vehicle, some automotive manufacturers design their vehicles to be easily equipped for towing by supplying a socket, integrated into the vehicle's electrical system, to readily accept a custom wiring connector. With a CURT custom wiring connector, there is no need to tap into the taillight assembly because a special socket is already provided.

Even if you've already hitched your trailer up, you're not actually ready to hit the road. What you also need to do is ensure the trailer has enough power to run turn signals and brake lights. That's why you need this T-connector. CURT applies SMT (surface mount technology) to any T-connector with a built-in converter, which allows for lower resistance, less heat generation and longer life cycle. The majority of CURT T-connectors require neither splicing nor cutting or taping, however if the length is not appropriate, you can cut the connector to appropriate length and splice it to the tail light wiring. Custom-designed to precisely fit your vehicle, this T-connector is created to deliver unsurpassed levels of performance, reliability and durability.

CURT® Manufacturing has been a leader and innovator in the trailering industry since 1993. CURT markets a broad range of trailer hitches, towing systems and related accessories. CURT is "The First Name in Towing Products" for automobile and truck hitches, as well as RV and commercial towing systems. Products are marketed through retailers, distributors, installers, and e-tailers across the U.S. and Canada. CURT employs almost 350 associates, primarily at its manufacturing and headquarters in Eau Claire, Wisconsin. CURT operates 10 regional warehouses, each carrying over 2,500 items and has been twice named a Wisconsin "Manufacturer of the Year".

Brand:
Part Number:
55664
UPC:
612314556649

Reviews

(55)
Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
CURT® 55664 - 4-Way Flat and 6-Way Round Custom Wiring Connector
/5
1-10 of 55 Reviews
5 of 5
2025 Chevy Trax Trailer Wiring Hook Up
CURT® - T-Connector
Recently purchased a 2025 Chevy Trax and Installed a Trailer Hitch and needed a plug and go Trailer Harness, I bought the Curt T-Connector which was a perfect fit and also included all necessary connectors and directions, you will need to purchase the plastic tools to help in the removal of components in back of trunk to gain access to car harness to hook it all up, after hook up I plug in trailer to car and all lights worked perfect, its a good clean set up.
Posted by Raymond (Los Lunas, NM) / September 27, 20242025 Chevy Trax
4 of 5
Easy to install
CURT® 56332 - T-Connector (Circuit Protected, Powered, Potted)
This is replacing one that I installed about 5 years ago and quit working. I wish it would have lasted longer but the fact that it is plug and play made the replacement not so difficult.
Posted by Customer / June 03, 20212016 Kia Sedona
1 of 5
Wired backwards?
CURT® - T-Connector
This item appears to be wired backwards. At the end that plugs into the vehicle with the clip side up the wiring, from left to right, should be white, brown, green and yellow. It is actually green, yellow, brown and white.
Posted by Customer / April 27, 20212019 Cadillac XT4
1 of 5
Works 10% of the Time.
CURT® - T-Connector
Left flasher acts like if rear bulb was burnt, but it sometimes works.
Posted by Customer / December 13, 20202009 Dodge Journey
5 of 5
Perfect Installation Of The T-Connector
CURT® 56186 - T-Connector (3-Wire System with Converter)
It cannot possibly get any simpler than this marvelous wiring connector. I strongly recommend this for anyone who is installing a hitch on their car. I give it 5 stars!!
Posted by BRIAN (Orlando, FL) / September 03, 20202016 Kia Forte
Worked perfectly! Very easy to hook up! Very pleased.
Posted by Customer / July 18, 20202018 Chevy Silverado 1500
5 of 5
Trailer Hitch Wiring
CURT® - T-Connector
Perfect fit, plugs into Toyota wiring harnes no issues. Great product.
Posted by Doug (Indiana, PA) / July 08, 20202001 Toyota 4Runner
4 of 5
Very Easy Installation and Use.
CURT® - T-Connector
Between the instructions provided and information on YouTube, the installation of the T-Connector is easy. For testing, installers should buy a flat-4 cable (LED) tester; they only cost a few dollars. The only criticism that I have is the self-tapping screw provided to secure the earth cable. It didn't at all look fit for purpose.
Posted by David (Kanata, ON) / November 04, 20192014 Dodge Charger
5 of 5
Ok
CURT® 56324 - T-Connector
Easy install.
Posted by Andre (Deux-montagnes, QC) / November 02, 20192016 Honda Civic
5 of 5
Trailer Wire Converter
CURT® 55336 - T-Connector (3-Wire System with Converter)
Good product, and very easy install.
Posted by Norbert (Naramata, BC) / September 13, 20192003 Honda Element

Questions and Answers

(0)
If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!