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  1. Custom Fit Vehicle Wiring
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  4. Custom Fit
  5. Trailer Hitch Wiring
  6. Powered Converter
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: C56405
$94.88
Retail:$151.95
You Save: 38%
Custom Fit Vehicle Wiring

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In Use/Installed

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 C56405 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 (16)
  • Q & A (0)
  • Photos

CURT Custom Fit Vehicle Wiring - C56405

  • 4 Flat
  • Custom Fit
  • Trailer Hitch Wiring
  • Powered Converter
  • CURT

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 in rear cargo area
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes a powered tail light converter that connects directly to your battery to avoid overloading your 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: 5.0 amps per circuit
    • Tail lights: 7.5 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 all trunk floor coverings, rear scuff panel, and interior side trim panel, and pull back the felt trunk liner to access these connection points. Once you've plugged in the T-connector, run the hot lead to your car battery, which can be found in your trunk on the passenger's side. 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 trunk.


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.


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.



56405 Curt T-Connector - Surface Mount Technology - 4 Wire

Installation Details C56405 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56405

Average Customer Rating:  4.9 out of 5 stars   (16 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. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.

by:
Volkswagen Golf

The wiring kit is working perfectly after 1 year of use! I tow my dirtbikes to the trail with my Golf a few times a month and the lighting always works! Installation was a breeze while following along with the video. I did take some extra steps and ran the power wire under the interior trim. I wish more sites would take after etrailer with the video instructions and customer support. I initially ordered the wrong harness and the team made getting the correct replacement a breeze!!



by:
2019 Volkswagen e-Golf

2019 eGolf - Worked well, tapped into the rear 12v socket for power to avoid going under or through the car to the battery. THEY WON'T TELL YOU BUT THIS WILL WORK ON A EGOLF



by:

Excellent, great fit. The only reason for 4 stars instead of 5 is that I would have preferred not having to run a power line all the way to the battery at the front of the car. It always makes me feel a bit sketchy that the wire will catch on something even though there were plenty of zip ties to secure it. Also by having the power line it is immediately apparent that there was electrical work done to the car which can potentially void the factory warranty if there is an electrical failure.

Heather A. profile picture
Etrailer Expert

Heather A.

6/23/2021

Thank you for your review. As long as you keep the wiring away from moving parts and heat with a lot of zip ties then you shouldnt have any issues. There is a law called the Magnussen-Moss warranty act that states, in part, that if you install an aftermarket part on your car then it will not void the warranty unless that part caused the problem.



by:

VW GTi 2020 install was a snap what a headache remover just gonna rewire the trailer and plug n go. VW dealer couldn’t help me out wanted to send me to an RV Shop to get fixed up. That’s when I did some searches n etrailer popped up and all my troubles are gone DYI easy peasy ready to roll n tow



by:
2020 Volkswagen Golf

Works great, but the install instructions are BAD, video is not great either. Install per instructions looks DIY, and there are better ways to route wire and hook up to battery that look way more stock/ factory. Will need crimp tool to do proper wire connections.



by:

One Year Later...
The light kit is still
working just fine. Can't complain at all.



by:
Volkswagen GTI

PERFECT for my 2020 GTI. Easy install and works a charm.



by:

Perfect fit



by:



by:



by: 06/20/2024
2019 Volkswagen Golf



by:

Excellent customer service Thank you An drew



by:



by:
2019 Volkswagen Golf



by:
2020 Volkswagen Golf



by:
2018 Volkswagen Golf


16
16

See what our Experts say about this CURT Custom Fit Vehicle Wiring

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    Though The Curt harness # C56405 is not confirmed for you 2016 Volkswagen Golf The ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT is confirmed. This modulite harness includes the circuit protection to safeguard itself and the tow vehicle from harmful electrical shorts and mis-wire situations. This harness powers the trailer's stop, turn, tail and running lights directly from the tow vehicle's battery and offers a no-splice...
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  • What is the Height From Ground to the Top of Drawbar on 2018 VW Golf GTI?
    The Draw-Tite Sportframe Trailer Hitch Receiver # 24979 will have a height of approximately 13" to the inside top of the receiver tube on your 2018 VW Golf GTI. The center of the bolt hole will sit approximately 4" from the outermost point of the rear bumper. The T-One Vehicle Wiring Harness 118787 is only confirmed to fit the Golf R Models. For your GTI you will need the Curt T-Connector Vehicle Wiring Harness # C56405 for a 4-way flat connector. The EcoHitch Hidden Trailer Hitch Receiver...
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  • Can Trailer Hitch be Installed on 2019 Volkswagen Golf TSI
    What you are referring to is actually pretty common when it comes to smaller vehicles. It isn't surprising to see that UK versions are given the thumbs up to tow while US versions are discouraged from towing and I'm not sure what the reason is. I will say that quite a few people do still get trailer hitches installed on their Volkswagen Golf and are just fine. I can't really go against what your owner's manual says but if you do decide to install a trailer hitch the Curt Class I part #...
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    The best trailer hitch for your 2018 VW Golf is the Curt # C11412 because it does not require any trimming of the rear fascia on your vehicle. To add wiring which will give you a 4-way connector and allow you to power your trailer's lights you need Wiring Harness # 118646 unless your '18 Golf is the GTI; for that you will need Wiring Harness # C56405. The correct ball mount for your Golf with this hitch is the Curt # C45521 and will require Pin and Clip # F-4 as well as either 1-7/8"...
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    Image 1 for
  • Trailer Hitch For 2019 Volkswagen Golf GTI That Does Not Require Fascia Trimming
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  • Will Curt Wiring Harness Fit 2021 Volkswagen Golf GTI Autobahn
    Yes, you can be confident that the Curt # C56405 will fit your 2021 Volkswagen Golf GTI Autobahn. Sometimes manufacturers like Curt haven't had a chance to test fit something so their fitment is behind. We make sure it is a confirmed fit before listing it that way on our site. The connections are the same so it will work with the 2021 like yours. I have attached an installation video below for your reference.
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Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Ronnie R
Written by:
Ronnie R
Employee Shane H
Test Fit:
Shane H
Employee Jonathan Y
Video by:
Jonathan Y
Employee Michael B
Video by:
Michael B

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