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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 # C56320
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Custom Fit Vehicle Wiring

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Curt 4 Flat Custom Fit Vehicle Wiring - C56320
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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. Call 800-298-1624 to order Curt custom fit vehicle wiring part number C56320 or order online at etrailer.com. Free expert support on all Curt products. Guaranteed Lowest Price and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (50)
  • Q & A (70)
  • Photos
  • Why etrailer?

Curt Custom Fit Vehicle Wiring - C56320

  • 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.


  • 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 behind tail lights
    • 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 behind your tail lights. You will have to remove the trunk floor coverings, storage trays, rear scuff panel, trim panel, and tail lights 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.

56320 Curt T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C56320 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56320

Average Customer Rating:  4.8 out of 5 stars   (50 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.

- C56320

Very happy with the product, love the way it looks and only the tongue can be seen. The how to video was instrumental and well-made. The entire process from Ordering to this review has been excellent! What a great company!

- C56320

Very easy to install. The plugs are so easy to use vs splice connectors. I don't tow often so I store the plug inside. That works great, the plug to the trailer should last a lot longer that way.

- C56320

I have towed my utility trailer several times, and couldn’t be happier with the hitch. I was thinking about buying a pickup truck, but by installing the hitch, I got the hauling capacity I needed for a lot less money. I also plan to buy a cargo carrier for deer season so I don’t have to haul game inside my Escape

- C56320

This harness was exactly as advertised and installed seamlessly. Went in without a hiccup.

- C56320

I am very pleased with your response in getting the products to me so quickly and everything looks great thank you

- C56320

Looks great. This will be a perfect fit for my truck. Thank you.

- C56320

After one year and many uses, the hitch and the wiring kit have performed flawlessly. Great fit and great company to deal with.

- C56320
2017 Ford Escape

The kit was pretty good, but I didn't use the cheesy butt splices, opting to use heat-shrink, waterproof ones. Instead of gluing the converter box on with the provided mounting tape, which doesn't last in my experience, I zip-tied it to the plastic hangers that hold the wire bundle leading to the left rear light assembly. Also, if I had it to do again, I'd check to see if suitable power for the powered converter box could be found at the fuse box in the right rear of the car--running the wire to the battery was a huge pain, and seems like overkill. The instructions were missing a page. I was able to download a pdf, but it would have been nice if they had been complete. Buy extra zip ties before you start. It takes a lit to secure the power wire. Bottom line, this is a good kit. You won't regret getting this product.

- C56320

Easy wiring

- C56320

I was satisfied with shipping speed. Item was easy to install and is working as described. The video provided on etrailer site was very helpful in the installation, mainly because it showed how to install it on the make and model of my car. The video is the main reason I ordered from etrailer.

- C56320

Exceedingly prompt delivery! Everything looks great, just what I need! looking forward to having my favorite mechanic put the hitch and wiring on as I prefer to not do my own work these day.

- C56320

My wiring harness did not come with everything shown in picture but had enough parts to install videos are way more helpful than paper instructions

- C56320

Easy to install, works great

- C56320

Got the mostly hidden trailer hitch . Even though it was a bit harder to install I definitely feel it was worth it. I feel it looks better than the factory models! The lighting install went well also. All directions were very clear.

- C56320

Great service.

- C56320
2017 Ford Escape

The wiring harness went in without any problems. The the instructions were clear and accurate, great product.

Without any problems
Otmar R - 05/29/2019

- C56320

Etrailer is a very good and knowledgeable company with trailer hitches and parts. I have ordered from them 2 times and i tell all my friends to order from them too.

- C56320
2017 Ford Escape

Wiring harness took our serviceman a few hours to install. Towbar was very easy to install. Looks good, though! Will be towing a small camper and hauling things in a trailer. Price was great! Thank u!

- C56320

Worked great. It can be a little tough to fish the wire along the bottom and tuck it safely away - so take your time. I do worry about any sharp edges where the wires could get chaffed. I added some protection in those areas. So far so good.

- C56320

Fantastic installation video from etrailer...went exactly as described and seems like a quality product too. Installed on 2017 Ford Escape.

- C56320
2017 Ford Escape

Ford Escape trailer wiring kit made trailer lights installation very easy, and it works great. Highly recommended.

- C56320
2017 Ford Escape

I purchased the full towing package for my 2017 Ford Escape. Couldn’t be more satisfied. Installing it was a breeze . Perfect fit. My son and I purchased our first bass boat and can’t wait to hit the water.

- C56320

used c56320 twice had it installed by professional mechanic had to replace it already nothing wrong with wiring but box failed.Needed it so had to install a new one .Not Happy

- C56320
2017 Ford Escape

I love these plug and play wire harnesses . back in the day I had to splice into the factory wiring to wire up a 4 way flat plug. Today it is made easy. Came with good directions and easy to install.

- C56320

I ordered the hitch and electrical harness together. Both arrived the very next day in perfect condition. Installation was completed the next day with assistance of a neighbor to help hold up the hitch while attaching the bolts on each side. All the rest went smooth and the hitch looks great! Very pleased at this point!

Show More Reviews

Ask the Experts about this Curt Custom Fit Vehicle Wiring

  • Can You Use Rear Fuse Box To Power Trailer Wiring Harness for 2018 Ford Escape
    In regards to installing a trailer wiring harness like the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # C56320 on a 2018 Ford Escape, you must run the power wire directly to the battery per the instructions. This is the only way to ensure the circuit will be rated correctly for the converter module. I cannot recommend any other power source.
    view full answer...
  • Recommended Trailer Wiring Harness on a 2017 Ford Escape
    There are 2 T-connector wiring harnesses for your 2017 Ford Escape, parts # HM40524 and # C56320. Basically, they serve the same purpose but are made by different companies. Part # HM40524 is made by Hopkins and # C56320 is made by Curt. Between them both I recommend the Curt. Our installers here tend to have better luck with the Curt wiring products.
    view full answer...

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

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    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Cole B
Installed by:
Cole B
Employee Chelsea B
Written by:
Chelsea B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Brent H
Test Fit:
Brent H

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