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FITS 2018 Volkswagen Beetle
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 # C56380
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Custom Fit Vehicle Wiring
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2018 Volkswagen Beetle

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Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Custom Fit C56380
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The best technical support and full custom fit vehicle wiring installation instructions. Lowest price Beetle custom fit vehicle wiring guarantee and expert service. Volkswagen Beetle, 2018 custom fit vehicle wiring by Curt are available from etrailer.com. For expert service call 800-298-8924 to order your Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part number C56380, or order online at etrailer.com.
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2018 Volkswagen Beetle - Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

  • Trailer Hitch Wiring
  • Curt
  • 4 Flat
  • Powered Converter

Quickly and easily install a 4-way trailer connector on your Volkswagen Beetle 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.


  • 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 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


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located in the rear cargo area. You will have to remove the trunk floor coverings, storage trays, rear scuff panel, and interior side felt liners 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.

56380 CURT T-Connector Volkswagen Beetle Wiring Harness with 4 Pole Trailer Connector

Installation Details C56380 Installation instructions

California residents: click here

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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56380 Review

Speaker 1: Today we're going to take a look at the Curt T-Connector Vehicle Wiring Harness with the 4-way flat trailer connector. This is a custom-fit part. This designed to fit the 2012 and new Volkswagen Beetle vehicles. And on a custom-fit part, I always like to recommend for you to go to our website, use our fit guide, put in your year and model vehicle, and it will show you if this will work for your application.Now this harness will provide this 4-way flat trailer connector to the back of your vehicle to power your trailer signal lights, and it is compatible with 5-pole, 6-pole, and 7-pole adapters that we do sell separately. This does connect very quickly and easily. Basically, you just locate your connection points, which are in your rear cargo area, plug in these T-connectors, one on each side, one on the driver's, one on the passengers.

Ground the white wire right here, and then this black wire is your power wire that will run to your vehicle's battery.Now this harness does include this black box, which is a tail light converter. This is to ensure that your vehicle's wiring will match that of your trailer. And it is a power module. That's why you'll run the wire to your vehicle's battery, and it connects directly to the battery to avoid overloading your vehicle's electrical system. This is constructed using SMT technology, which is surface mount technology.

It gives you a more consistent, reliable performance. Helps maximize your trailer light yield and intensity while producing minimal heat. And it will ensure superior operation in rough road conditions.If you notice, it comes with a nice dust cap for your 4-way. So what you can do is just attach that to the 4-way plug, and when you're not using it or plugged into your trailer, you just put that 4-way over there and it protects those terminals from any damage or from the elements. Now this harness is made in the USA.

A few specs on it. The maximum amperage for the stop and turn lights circuit is 3 amps per circuit. The tail light's the 6 amps total.Now it does include everything laid out here on the table. I'm going to try to briefly go through it and just show you where all these parts go. And it even comes with a nice set of detailed instructions that'll describe how to do everything and even have pictures on how to install it.Basically again, what you'll do is you'll access the rear cargo area.

Go access behind the tail lights. You want to start on the driver's side. Take this T-connector; it has the yellow wire on it. That's for the driver's side. You unplug your harness from your tail lights, plug this in between there, and then again you have your white wire with your eyelet on it. You want to connect that to a good, clean ground if there's one nearby. If there's not, they do include a self-tapping screw that you can make your own ground. Once that's connected, you'll take the other T-connector with the length of green wire, run that over to the passenger side, do the same thing. Plug this in behind the tail light.Now this converter box right here, you do want to attach this to a surface so it doesn't bounce around. So they do include this piece of double-faced tape that you could use and attach that to a good, flat surface. And then your last wire, you'll run this wire with the 4-way out towards the back to where the trailer is going to be.And your last wire to connect is this black power wire. And again, this will connect to the vehicle's battery. So what you'll want to do is they include this length of wire. Take one of included butt connectors, put it on your power wire, and then connect it to one end of this length of wire just like that. And then run this length of wire all the way up to your front of your vehicle. When you get up there, you don't want to connect this directly to the battery. You want to run it through this in-line fuse holder.So take your other butt connector, connect it to one side of the fuse holder just like that. And then your other side of your fuse holder wire, this will connect to the battery. So they give you this eyelet that you can attach to it, connect to your battery. Once that's connected, pop open the fuse holder, take the included 10-amp fuse, install it in the fuse holder, put the cap on there, and your system will be already to go.Now they do include some extra cable ties to take up any slack in the wiring.But that should do it for review on the Curt T-Connector Vehicle Wiring Harness with the 4-way flat trailer connector.

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56380

Average Customer Rating:  5.0 out of 5 stars   (1 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.

- C56380

Had the parts I needed 481903


Ask the Experts about this Curt Custom Fit Vehicle Wiring

  • Comparing the Curt T-Connector C56380 and Tekonsha T-One 118688 for a 2019 Volkswagen Beetle
    The two trailer wiring harnesses that are offered for your 2019 Volkswagen Beetle are the T-One Vehicle Wiring Harness part # 118688 and the T-Connector Vehicle Wiring Harness part # C56380. The only real difference between them is more or less just the brand. They both install in the same fashion and come with the same components. However, I recommend the T-One Vehicle Wiring Harness for your Beetle because the converter box included with this wiring harness we see tend to last the longest....
    view full answer...
  • Recommended Trailer Hitch Receiver for a 2013 Volkswagen Beetle
    You want the Curt, part # C11354, for your convertible 2013 Volkswagen Beetle. The other hitch you mentioned, part # C11260, fits the coupe model but not your convertible. If you plan to use the hitch to carry a cargo carrier, bike rack, or some other non-trailer accessory you also need to use a support strap, part # 18050, in order to be compliant with Curt's warranty. If instead you'll be towing a trailer with your Beetle, you don't need the strap but do need the recommend ball...
    view full answer...

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Info for this part was:

Edited by:
Lindsey S
Installed by:
Jeff D
Updated by:
Sarah W
Updated by:
Kristina F
Updated by:
Isabelle B
Written by:
Amanda M

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