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

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

Item # C56374
Retail:$135.95
Our Price: $87.94
You Save: 35%
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 C56374 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 (20)
  • Q & A (0)
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CURT Custom Fit Vehicle Wiring - C56374

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 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 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 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 in your rear cargo area. You will have to remove the trunk floor covers, storage trays, scuff panel, and interior side panels 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.


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.



56374 Curt T-Connector - Surface Mount Technology - 4 Wire

Installation Details C56374 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 - C56374

Average Customer Rating:  4.9 out of 5 stars   (20 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:

Everything worked great. Straight forward install.



by:

Easy to install and the video on the site makes it better.



by:

Product itself is decent, does the job. Install can be challenging, mainly the power wire. I was able to run the power wire to the battery through the cabin. There are YouTube videos that show you how to find the fire wall access point. This way you can bypass running the wire underneath the car if you don’t have a lift or don’t want the wire exposed to the elements.



by:

Product was great, It installed just as the video's I watched said it would. Packaging: The box was beat to death due to the weight of the hitch. The hardware was loose in the box. It was all there, how I don't know because there were large holes in the box. It would have been much better if the hardware bag was taped to the hitch itself. I have used it to pull my kayak trailer and a bicycle rack. Good product.



by:

Everything looks good. However, while there is a schematic drawing of the wire going from the back of the car to the positive terminal at the front, there is no clue as to how to route it there.

Etrailer Expert

Sierra K.

9/24/2021

Thank you for your review. We have a video of the wiring installation that shows what the best route is:



by:
2017 Volkswagen Passat

Again, ordered for my 2020 Passat but none of the connectors matched and the box it came in said it was for 2017. My son used it on his 2014 Passat. Easy to install and works great



by:
2015 Volkswagen Passat

Fast Delivery. The installation took me a little while but if you follow the directions this assembly will install fairly quickly.
Everything seems to work very well!



by:

No splice plug in connectors are the only way to go!! However the hardest part is running hot feed wire to battery but not THAT bad...



by:
2013 Volkswagen Passat

Nice one
Quality



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2013 Volkswagen Passat



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2017 Volkswagen Golf



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2015 Volkswagen Passat



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2013 Volkswagen Passat


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

  • Recommended Trailer Wiring Kit For 2015 Volkswagen Passat TDI
    We do offer a wiring harness for your Passat. I recommend theCurt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56374. This is a custom harness for your Passat.
    view full answer...
  • Recommended Trailer Hitch And Wiring For 2015 Volkswagen Passat Sedan With 1.8 Turbo
    The trailer hitch I recommend for your 2015 Passat is the Draw-Tite, part # 24880. This is a Class l hitch and it has a 1-1/4 inch receiver opening. The trailer wiring for your Passat I recommend is the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56374.
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  • Recommended Hitch With Minimal Fascia Trimming for 2012 VW Passat
    There are two available Class I hitches for a VW Passat, the Curt # C11234 and the Draw-Tite # 24880. Both hitches will require that the underbody panel be trimmed to about the same degree, but the good news is that the trimmed portion is not visible from the rear of the vehicle. If you look at the diagrams I edited for you, you can see the amount of trimming required for each hitch, plus a photo showing the Curt hitch installed on a vehicle. The Draw-Tite would look almost identical once...
    view full answer...
    Image 1 for
  • Trailer Hitch and Wiring Harness Recommendation for 2013 VW Passat TDI SE
    We offer several light-duty Class I trailer hitch for your 2013 VW Passat TDI SE that can be seen on the link provided. All will require similar installation steps including temporary lowering of the exhaust (for better frame access) and trimming of the rear fascia and/or under-body panels. I suggest Draw-Tite # 24880 along with ball mount # 3590 and either 1-7/8-inch ball # 19256 or 2-inch # 19258. Written instructions and a video on hitch installation are linked for your reference along...
    view full answer...
  • Trailer Hitch Recommendation for Use with Curt Hitch on 2013 Volkswagen Passat
    Our trailer hitches like the Curt part # C112321 do not come with trailer wiring but this one does come with a ball mount. For trailer wiring you'd then want the Curt harness part # C56374 and you'd be set.
    view full answer...
  • 4-Way Flat Vehicle Wiring Harnesses For a 2013 VW Golf GTI
    The Curt Tail Light Converter that will fit your 2013 Volkswagen Golf TDI is the Converter # C56236, which will require you to splice into your tail light wiring. The Curt T-Connector # C56374 is only confirmed to fit the following vehicles and not your Golf GTI. 2012 - 2015 Volkswagen Passat 2014 - 2015 Volkswagen Passat 1.8L I4 Engine - Turbocharged 2012 - 2015 Volkswagen Passat 2.0L I4 Diesel Engine - Turbocharged and 3.6L VR6 models 2012 - 2013 Volkswagen Passat 2.5L I5 Engine 2017...
    view full answer...
  • Recommended Trailer Hitch and Wiring for 2014 VW Passat 2.5L
    The trailer hitch I recommend for a 2014 Volkswagen Passat 2.5L is the Curt Trailer Hitch Receiver part # C11232. This trailer hitch has a class I rating with 1-1/4" opening. It works great for towing or hitch mounted accessories. In order to add wiring, I recommend the Curt T-Connector Vehicle Wiring Harness part # C56374. This is a plug-in-play kit with no splcining. In order to complete your setup you'll also need the following: Curt Drawbar part # C45520 Curt Hitch Pin and Clip part...
    view full answer...
  • Recommended Trailer Hitch Receiver And Wiring For 2012 Volkswagen Passat TDI
    For your 2012 Volkswagen Passat TDI, I recommend the Draw-Tite Sportframe Trailer Hitch Receiver Class I - 1-1/4", # 24880. This is a well made custom-fit trailer hitch with black powder coat finish. It has a sturdy square tube design. With this hitch, I recommend the Draw-Tite Sportframe Drawbar 5/8" Rise 2000 lb Kit, # 3590. You will also need a 1-7/8 inch hitch ball like # 19256 or a 2 inch hitch ball like # 19258. For your wiring needs, I recommend the Curt T-Connector Vehicle...
    view full answer...
  • Recommended Brake Controller And Trailer Wiring For 2013 Volkswagen Passat
    If you do not have a 4-way connector on your Passat that is the first thing you will need. I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56374. This is a custom harness that allows you to quickly and easily install a 4-way trailer connector on your Volkswagen Passat. This T-Connector plugs directly into your existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. I have attached...
    view full answer...
    Image 1 for
  • Is a Wiring Harness Included with the EcoHitch # 306-X7332 for a 2017 Volkswagen Golf R
    The EcoHitch Hidden Trailer Hitch Receiver # 306-X7332 only comes with the trailer hitch itself, but for wiring we have the Curt # C56374 which fits the R model of your 2017 Volkswagen Golf. If you are looking to tow with your VW Golf then you will also need a ball mount, hitch ball, and hitch pin and clip. I recommend the Curt Kit # C45036 which comes with all of these components but you will want to check out the linked ball mount article to ensure that the 2" drop is correct for your...
    view full answer...
  • Recommended Trailer Wiring Harness for a 2016 Volkswagen Golf R
    I do have an option for you but the ZCI Circuit Protected Vehicle Wiring Harness part # 119250KIT is not recommended for use on your 2016 Volkswagen Golf R. Instead, you will want to use the Curt T-Connector Vehicle Wiring Harness part # C56374 which is actually a plug and play option that will not require you to cut or splice any wires like the original harness you inquired about does. With that being said, in order to hardwire a harness into your vehicle you would need to use a circuit...
    view full answer...
  • Availability of Class I Trailer Hitch for 2015 Volkswagen Passat with 1.8L TSI Engine
    Volkswagen introduced their Audi-developed 1.8L TSI engine and 6-speed automatic transmission for the Passat in February 2008. However, you are correct that we do not show this engine option among those on our hitch fit guide. I contacted Curt Manufacturing and they were able to confirm the fit of their 1-1/4-inch Class I hitch # C11232 on your 1.8L Passat. The hitch includes the required installation hardware and instructions, which are also linked for you. The linked hitch installation...
    view full answer...
  • Recommended Trailer Hitch for 2018 VW Golf R Model
    I reached out to my contact at Curt and they have not yet tested the fit on your model. It is very likely that the Curt Trailer Hitch Receiver C11475 will fit your vehicle but the fit has not yet been confirmed. For the only confirmed fit we have for your 2018 VW Golf R model, I recommend the EcoHitch # 306-X7333. I've attached the installation instructions to help. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56374 is also a very likely fit that...
    view full answer...
  • Recommended Trailer Hitch For 2013 Volkswagen Passat TDI To Tow Trailer For Motorcycle
    I recommend installing a trailer hitch like part # 24880 on your Passat, and using a motorcycle trailer to carry your bike. None of the trailer hitches we offer are capable of handling a 550 lb motorcycle in a carrier. The trailer hitches we offer are all Class l hitches and have a 1-1/4 inch receiver opening. The ball mount I recommend for your hitch is part # 3590. Then for a 1-7/8 inch trailer ball I recommend part # 19256. For a 2 inch trailer ball I recommend part # 19258. You would...
    view full answer...
  • Recommended Trailer Hitch Receiver to Fit 2013 Volkswagen Passat 2.0L Diesel
    For your 2013 Volkswagen Passat Diesel I recommend the Draw-Tite Sportframe Trailer Hitch Receiver # 24880. This is a Class I hitch with 2,000 pound maximum towing capacity and 200 pound maximum tongue weight. It has the same capacities as the Curt # C11234 however the Curt requires using a support strap, part # 18050 whenever carrying a non-trailer load like a bike rack or cargo carrier. If you're going to be towing a trailer with your Passat you'll also need a wiring harness. The...
    view full answer...
  • Trailer Wiring Recommendation for 2013 Volkswagen Passat
    For trailer wiring confirmed as a custom fit for your 2013 Volkswagen Passat the Curt T-Connector part # C56374 would be your best option. The # 119250KIT is a hardwire kit that requires you to test circuits of your vehicle's taillights. The tester is included in this kit. The part # C56374 plugs in line with the taillight connectors of your vehicle and does not require any hardwiring.
    view full answer...
  • What is Towing Capacity of 2013 Volkswagen Passat TDI
    Hey Anthony, looks like your 13' Passat is rated for towing up to a 1,000 lb trailer. Sounds like what you mentioned would fall under that number. Anything lighter than 1,000 lbs would be fine regardless of size. This would work great with the hitch part # 24880 and wiring # C56374. Congrats on the ex dumping too. Sounds like she wasn't "towing her own weight"...[rimshot]
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?


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 Dustin K
Video Edited:
Dustin K
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 Jacob H
Video by:
Jacob H

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