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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
2016 Keystone Bullet Travel Trailer
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CURT

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

Part Number: C56275
In Stock
$61.72
Retail:$105.95
You Save: 42%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2016 Keystone Bullet Travel Trailer

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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
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 C56275 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 (27)
  • Q & A (0)
  • Photos

CURT Custom Fit Vehicle Wiring - C56275

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Plug-and-Play Install: T-connector plugs inline with factory wiring—no cutting or splicing.
  • Ready for Trailer Lights: 4-pole flat connector powers trailer stop, turn, and tail lights.
  • Reliable Signal Conversion: Powered converter ensures vehicle and trailer lights sync correctly.
  • Clean, Factory-Style Fit: Hidden wiring design tucks neatly behind panels for a tidy setup.
  • Simple DIY Setup: Includes instructions with color photos to guide easy installation.

Features to know about

Installs Without Cutting or Splicing: Plug-In T-Connector Design

Wiring a trailer doesn’t have to mean cutting into your vehicle’s factory wiring. The Curt T-Connector plugs directly into existing tail light connectors to give you a 4-flat trailer connection. No splicing, no guesswork—just a straightforward plug-in setup that’s ready to go as soon as it’s connected.

Clean Power Delivery with a Powered Converter

When you hook up trailer lights, some vehicles need extra protection for their electrical systems. This harness includes a powered converter that draws power directly from the battery instead of the tail light circuit. It keeps the vehicle wiring safe from overloads while providing reliable power to the trailer lights every time you tow.

Hidden Connection for a Factory-Clean Look

Once installed, the wiring stays tucked out of sight. The hidden harness design routes neatly behind trim panels and through existing grommets, so there’s no need for drilling or messy exposed wires. The 4-flat connector can be stored inside or pulled out only when it’s needed, keeping everything protected and clean.

Ready for Everyday Towing: 4-Flat Connector for Basic Trailer Lighting

The 4-flat connector covers the essentials—running lights, turn signals, and brake lights. It’s the standard hookup for smaller trailers, cargo carriers, or light-duty towing setups. With the Curt harness in place, you get the right lighting signals for safe, legal towing without extra adapters or rewiring.

Specs

Electrical and Connector Specifications

  • Connector Type: 4-Pole Flat Trailer Connector
  • Converter Type: Powered Converter
  • System Type: Plug-In
  • Connector Location: Vehicle End Connector

Compatibility and Application

  • Fitment: Custom fit for Toyota Prius C (2013–2016 models referenced)
  • Towing Package Requirement: No Tow Package required
  • Installation Type: Plug and Play, no cutting or splicing required
  • Vehicle Interface: Uses factory T-connectors

Comparison diagram showing multiple Curt T-Connector vehicle wiring harnesses side by side with labeled callouts for connectors and converter boxes, used to illustrate product differences and installation layout.

Manufacturer Information

  • Brand: CURT
  • Model Number: C56275

Note

  • Towing Advisory: Toyota recommends against towing any trailer of any weight with the Prius C. Always check the vehicle owner’s manual before towing.

56275 Curt T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C56275 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.9

27 reviews
5 Stars
(24)
4 Stars
(3)
3 Stars
(0)
2 Stars
(0)
1 Star
(0)
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by:
Toyota Prius
Installation was relatively easy and the system worked perfectly at the first test. It doesn't get much use, but still operates great. With the price of fuel these days, it's nice to be able to haul bulky objects with a trailer and our Prius instead of driving the diesel 3/4 ton pickup.
by:
2018 Toyota Prius c
I was able to install it myself after watching the e trailer installation video.
by:
Easy website and great coordination with parts that need to go together. Simple easy to follow instructions and it works as necessary. I've purchased here before and I am coming back when I need another hitch and harness.
by:
2012 Toyota Prius c
Super easy to install. Thanks to etrailer for posting how to videos the product went in exactly how the video showed. The average joe will have no trouble installing this product.
by:
Quick shipping, good instructions using the video, straight forward installation, works great - especially with having its own power direct from the battery. First time my trailer lights have had normal brightness and are dependable. Thanks for a great product.
by:
I was amazed at how simple it turned out to be to use the harness I bought. The video instructions worked as explained, and the trailer lights worked correctly the first time I plugged in my trailer to the new harness.
by:
2012 Toyota Prius c
Cant get much done without a 2-inch ball and thanks to the swarms of agents/ servants of sandusky, trailer light wiring.

Thank you for offering a plug in setup VERY easy to install even for a guy who doesn't like low voltage.

You cant even rent a open trailer without wiring, just put it in.
by:
I have owned this wiring harness for about a year now. The install was very straight forward and easy with the provided videos. I have only used the wiring harness a couple of times but it has worked when I needed it.
by:
2012 Toyota Prius c
With the video online, it took me less than a half hour. Be careful removing the seat cover over the battery, since the clips on mine broke and I had to get new ones (for just a couple dollars). Also, be careful not to lose the washer on the battery.
by:
2012 Toyota Prius c
Easy to install and wire lengths are perfect. Hit the side pannel with a punch helps a lot before trying to screw the self tap screw. The 2 faces tape is a good idea, but couldn't find a place were it could fit well. I used tie-wrap to mount it.
by:
Easy to install, easier than the hitch actually. Works well but the video didn’t mention bolting in the negative battery back in, so if don’t your car won’t start up.
by:
2012 Toyota Prius
Great to have a company which distributes the Curt T-Connector to likely a niche market - the Toyota Prius C.
by:
2015 Toyota Prius c
This was amazing! I am intimidated by anything electrical but this was quick and simple. Everything I needed was included and it went exactly as shown in the instructions. The video made it easy and boosted my confidence.
by:
Adhesive for unit was completely dried out / old stock. Otherwise good product with Toyota specific T plugs. Matching cable tie adhesive pads would help, but gaffers tape worked OK.
by:
It works well when it works. These are super easy to install / replace. Annoying that mine failed just outside of warranty.
by:
2014 Toyota Prius c
Fast shipping and easy install. Great Product. Thank you
by:
2012 Toyota Prius c
No issues and easy installation!!!
by:
great
by:
Wiring was perfect fit.
by:
A+
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2012 Toyota Prius c
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Show More Reviews

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

  • Recommended Trailer Hitch for a 2014 Toyota Prius C
    In the owners manual Toyota does not recommend towing a trailer with your 2014 Toyota Prius C, or even installing a hitch. However, if you choose to do so, I can recommend the parts you will need. We offer two hitches for your 2014 Toyota Prius C, the Class I Curt Hitch # C11484 and the Class I Draw-Tite Hitch # 24889. Both have a towing capacity of 2,000 lbs GTW and 200 lbs TW. However, be sure to consult your owner's manual or contact your Toyota Dealer to see how much GTW and TW your...
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  • Easiest To Install Trailer Wiring Harness for a 2014 Toyota Prius C
    I do have a very simple and easy to use option for your 2014 Toyota Prius C but I have never heard of any such thing as a wireless trailer wiring harness before. Therefore, the only way to tow a trailer with your Prius is to install a wired trailer wiring harness. I recommend the Curt T-Connector Vehicle Wiring Harness part # C56275 because it is plug and play which means no cutting or splicing is required. This will be the easiest to install and least invasion trailer wiring harness available...
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  • Recommended Ball Mounts Compatible with 2" EcoHitch Hidden Receiver # 306-X7194 On a 2015 Prius c
    The EcoHitch Hidden Trailer Hitch Receiver # 306-X7194 for your 2015 Toyota Prius c has a 2" receiver that we measured to have a hitch height of 11-1/2". With this you can use either a fixed ball mount like the Curt # C45100 that has a 6" rise which would fit on a trailer with a hitch height near 15-1/2". You will need either a 1-7/8" # C40002 or 2" # 40038 ball. If you intend to pull different trailers that can have different hitch heights an Adjustable Ball Mount # BWTS10038B will allow...
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  • Recommended Trailer Hitch Receiver and Vehicle Wiring Harness For a 2013 Toyota Prius C?
    I recommend the EcoHitch Hidden Trailer Hitch Receiver # 306-X7194 for your 2013 Toyota Prius C. The Curt # C11276 you found will not fit your particular Prius C. The EcoHitch has the larger 2" receiver allowing for a much larger selection of hitch mounted accessories. It is best to install the Curt T-Connector Vehicle Wiring Harness # C56275 when you install the receiver. This will give you a 4-way flat connector. This is the most common connector used on small trailers you might tow....
    view full answer...
  • Recommended Trailer Hitch Receiver Compatible With Toyota Prius C Model
    We have a confirmed fit for your Toyota Prius C in the Draw-Tite Sportframe Trailer Hitch Receiver # 24971 or the Curt # C11484. These hitches are confirmed to fit model years 2012-2017. If you need a ball mount, I recommend the Sportframe Drawbar 2-1/8" Rise or 2-3/4" Drop 2000 lb Kit # 3593 along with a ball mount like # 19256 for a 1-7/8 inch ball or # 19258 for a 2 inch ball. For wiring, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector...
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  • Recommended Bike Rack For a 2016 Toyota Prius c For Carrying a Bulls Lacuba E-Bike With Fenders
    I recommend using the Yakima OnRamp Bike Rack # Y36FR with the EcoHitch Hidden Trailer Hitch Receiver # 306-X7194 on your 2016 Toyota Prius c. The OnRamp is capable of supporting bikes with a weight up to 66lbs. It is capable of supporting 2 bikes as you need a rack that uses a frame mount. Your Bulls Lucha e-bike has fenders that will not work on a single bike bike rack that clamps the bike in place by the wheels and tires. The OnRamp also includes a 51" ramp that will make loading your...
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  • Parts Needed to Tow Small Trailer With 2014 Toyota Prius C
    We do have everything you need for your 2014 Toyota Prius c to tow a small trailer, which is a hitch, wiring harness, ball mount, and hitch ball. I'll make a list for you of all the parts: - Draw-Tite Trailer Hitch Receiver # 24971 - Curt T-Connector Vehicle Wiring Harness # C56275 - Draw-Tite Drawbar # 3593 - 1-7/8" Hitch Ball # 19256 or 2" Hitch Ball # 19258 The hitch ball size will depend on the size of your trailer's coupler, but it will likely be 1-7/8" since it is a small trailer....
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  • Trailer Wiring Harness for Use with 2014 Toyota Prius C
    We offer Curt custom-fit trailer wiring harness # C56275 for your 2014 Toyota Prius C. Please note that Toyota recommends against towing any trailer of any weight with this vehicle. Be sure to carefully check your Prius owner's manual before towing any trailer. You may care to refer to the linked help article for towing basics.
    view full answer...
  • Installation Instructions For Curt # C56275 Trailer Wiring Harness on 2014 Toyota Prius C
    It certainly does include installation instructions. If you click the provided link, you can see a copy of them. Curt does a nice job on their installation instructions, they even provide color photos that help make the installation much easier. I've also linked you to an FAQ article that provides some guidelines on how to route the power wire form the rear of the vehicle up to the battery.
    view full answer...
  • Trailer Wiring Harness Recommendation for 2016 Toyota Prius c
    For a custom fit trailer wiring harness confirmed as a fit for your 2016 Toyota Prius c the Curt kit part # C56275 would be what you would want.
    view full answer...
  • Trailer Wiring Harness For 2015 Toyota Prius C
    The Curt T-Connector Vehicle Wiring Harness # C56275 has been determined to fit the 2015 Toyota Prius C. I have attached a review video of this product for you.
    view full answer...
  • Trailer Wiring Install Harness for 2013 Toyota Prius c that Has Long Enough Harness
    We had a chance to install the Curt trailer wiring harness part # C56275 on a 2014 Toyota Prius c just like yours and we found that all of the wiring of the kit was the correct length. See the attached install video for more info and to see the install process walked through.
    view full answer...

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


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Jared G
Test Fit:
Jared G

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