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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

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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 C56320 or order online at 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.
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  • Reviews (63)
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  • Why etrailer?

CURT Custom Fit Vehicle Wiring

  • 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

Item # C56320

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   (63 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.

Ford Escape

Wiring harness installed just fine. Took twice as long as putting the hitch on though as much to take apart. Video helped but my Escape had more accessory items wired in back than what video showed so took a bit longer. Hardest part was getting the module power wire up to battery in engine compartment. Would be nice if wire protector was included for going to flat connector at rear of car.

2017 Ford Escape

Works great with my 2017 Ford escape. Easy 1 person install with basic knowledge and tools in just a couple hours.


Thank you etrailer. My product arrived today and in perfect condition. The whole process was very informative and simple to proceed with. I have not done the install as of yet but will very soon. I’m also impressed with the quality of the hitch (heavy duty)


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.

I have had no problems with the t connector. I did not connect the hot wire to the battery. I connected an old style cigarette lighter plug to the power wire along with the included fuse holder which I plug into the 12 volt power outlet in the storage area of my 2018 Ford Escape.This provides plenty of power to power the lights on my boat trailer which is all Leds. It would probably power about any trailers lights. I store it under the spare tire cover when not in use.
Thomas - 10/05/2021

The power wire must be run to the battery as specified in the installations. The rear cigarette lighter outlet cannot be used for this purpose as it does not have the proper rating so it could short out your wiring or your vehicle's electrical system.

-- Etrailer Expert Heather A - 11/3/2021


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!


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


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


Wiring kit was great. Online instructions were excellent and made the job easy to accomplish for someone with moderate mechanical inclination. Definitely recommend.


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.


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

2017 Ford Escape

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


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

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

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.


Just what we needed. Thanks!

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.


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!


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

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!


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.


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


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.


Easy wiring


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


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.

Show More Reviews

Ask the Experts about this CURT Custom Fit Vehicle Wiring

  • Recommended Wiring Harness for 2017 Ford Escape with LED Tail Lights
    Both vehicle wiring harnesses that are available for your 2017 Ford Escape without the tow package will work and function properly with the LED lights on the vehicle. They both feature a powered converter and require a hot lead that will run up to the Escape's battery to provide power and avoid overloading the vehicle's electrical system. The LED lights will not be an issue. Between the two harnesses, I recommend going with the Curt Vehicle Wiring Harness # C56320. As you mentioned in...
    view full answer...
  • Where to Install Curt 4-Pole Flat Trailer Connector on 2017 Ford Escape
    I would be happy to help you with the install of the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56320 on your 2017 Ford Escape. All you need to do is plug in the T-connector at the points behind your tail lights and run the hot lead to your car battery. I have added a link to a video showing this harness being installed on a '17 Escape for you to take a look at which will show you exactly how to install the harness.
    view full answer...
  • Recommended 4-Pole Flat Trailer Connector For 2017 Ford Escape
    The T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56320, is the correct fit for the 2017 Ford Escape. The Tekonsha 118566 has been discontinued and is not a fit for the 2017. This product quickly and easily allows you to install a 4-way trailer connector on your vehicle with this custom wiring harness. The T-Connector plugs directly into existing wiring. The Powered ModuLite reduces strain on the wiring system. The Plug-In Location is behind driver and passenger...
    view full answer...
  • Trailer Brake Lights Illuminate On 2018 Ford Escape When Headlights Are Turned On
    Yes, the Curt T-Connector Vehicle Wiring Harness part # C56320 is correct for your 2018 Ford Escape. In order to make sure the converter box is functioning correctly, you will need to test for power on each of the wires leading into the converter box and then make sure that power is leaving on the correct wires. For example, if you turned on the headlights you should have power on the brown wire leading into the converter box but if power was then sent to either the green or yellow wires...
    view full answer...
  • How to Test Converter Box of Trailer Wiring to Determine if Box Has Internal Problem
    Here's how you use your circuit tester to determine where the problem is. Use it to test the wires that run into the converter box first. If voltage is present there then you know the convert box has a problem. If there is no voltage there then the issue is related to the connection to the vehicle wiring. If the box is bad you'll need to replace the kit. Which if it's brand new it's most likely bad and needs to be warrantied.
    view full answer...
  • 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...
  • Wiring Harness with 4-Way Flat Connector for a 2018 Ford Escape
    To add wiring to your 2018 Ford Escape I highly recommend the Curt T-Connector # C56320. This plugs in behind your tail light housing and then draws power for your trailer lights directly from the battery via the 12V power cord. I have attached an installation video for you to reference as well as the written instructions.
    view full answer...
  • Recommended Trailer Wiring Harness for a 2018 Ford Escape Without Factory Tow Package
    For your 2018 Ford Escape without factory tow package I recommend the T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56320 because Curt has a better reputation with customers for their wiring harnesses over the competition. This harness will simply plug into the factory wiring connections behind your tail lights. Once installed you then will run the included power wire up to the battery. I've attached an installation video to assist as well as an article to...
    view full answer...
  • Best Trailer Wiring Harness for 2018 Ford Escape Without Factory Tow Package
    The best trailer wiring harness for your 2018 Ford Escape is the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56320 because of its simple installation and the fact that it is rated for the most amps among the harnesses available for your Escape. This connector simply plugs into connection points behind your Ford's tail lights and will then require you to run a hot lead to your battery; you can see how this is done in the linked video which shows the harness...
    view full answer...
    Image 1 for
  • Trailer Wiring Recommendation for 2018 Ford Escape
    For your 2018 Ford Escape the best trailer wiring option we have is the T-Connector kit part # C56320 which is a confirmed fit and our most reliable brand. I attached an install video for this kit for you to check out on a 2018 Ford Escape just like yours as well.
    view full answer...
  • Can Trailer Wiring Harness Power Wire Be Connected To 12V Circuit In Rear Cargo Area Of 2017 Escape
    When installing a trailer wiring harness like part # C56320 on your 2017 Escape, the Black power wire needs to be run to the positive battery post. A lot of folks want to use a circuit near the back of the vehicle instead of running the wire all the way to the battery. We recommend installing it as per the installation instructions. If you connect to a different circuit, you would not be aware if a fuse blew or if something happened to the circuit, which would mean you have no lights...
    view full answer...
  • Auto Headlamps on 2017 Ford Escape Won't Work After Curt C56320 Trailer Wiring Harness is Installed
    I spoke with my contact at Curt regarding the issue you're having, and according to the folks at Curt what you have going on is almost certainly coincidental as the proper installation of the # C56320 wouldn't have any impact on the auto headlamp feature of your Escape. The functions are nowhere near related. I'd recommend looking over the linked installation video and instructions to confirm the installation was done correctly. One possible cause would be if the 12V circuit that is supposed...
    view full answer...
  • Running Power Wire of Tekonsha Trailer Wiring Harness in 2017 Ford Escape
    When installing the wiring harness # C56320 in your 2017 Ford Escape the power wire should be ran directly to the battery. It's protected by the included fuse. There's no need to install a switch because your Escape's tail lights will function normally with the harness installed. The power wire powers the harness to keep the trailer lights from drawing all their power directly from the tail lights. The 4-way will still receive power when not towing which is normal.
    view full answer...
  • Which is Easier, Routing Power Wire Under Carpet or Under the Vehicle for Trailer Wiring
    On a new vehicle it's going to be much easier to run the power wire for trailer wiring like the part # C56320 outside of the vehicle as opposed to pulling up the carpet and then trying to get it through the firewall. I attached a help article that covers the options for routing the power wire of a trailer wiring harness for you to check out as well.
    view full answer...
  • Trailer Wiring Harness to Fit 2015 Ford Escape
    The wiring harness # 118715 is for the 2017 Ford Escape. The correct harness for your 2015 Ford Escape is # C56320. This uses a 4 pin design.
    view full answer...
  • Recommended Trailer Wiring Harness for 2017 Ford Escape with LED Lights
    If your 2017 Ford Escape does not have the factory tow package, I recommend the Curt T-Connector Vehicle Wiring Harness # C56320. This custom-fit harness will install by connecting to the built-in ports located behind the driver and passenger side tail lights. You will then run the red hot lead up to the Escape's battery. This harness will work with the LED lights on both your vehicle and trailer. The included converter will still be needed for your Escape to safeguard its delicate wiring...
    view full answer...
  • Does Curt Trailer Wiring Harness Pull Much Power When Not Connected to Trailer
    A powered 4-pole wiring harness like the Curt # C56320, which fits your 2017 Ford Escape that does not have the tow package, will not pull significant current from your vehicle battery/alternator unless the harness is connected to a trailer. When connected, the trailer lights will demand power from the harness but the harness itself will barely draw any power unless connected to a trailer. You do not really need to pull the fuse but if you plan to store the vehicle for an extended period...
    view full answer...
  • Does Power Wire of Trailer Wiring for 2018 Ford Escape Have to Run to Vehicle Battery
    Not all vehicles can handle the additional amperage draw of the trailer taillights on the vehicle taillight circuits. Those vehicles need setup that draws power from the battery. Some vehicles have higher rated circuits that can handle this, and others need to have the power drawn straight from the battery to protect the taillight circuits. Even if the circuit you have at the rear fuse box is more than capable for the trailer wiring harness part # C56320 bypassing it and running the battery...
    view full answer...
  • How Long Does It Take To Install the T-Connector Harness C56320 On A 2017 Ford Escape
    For starers, the T-Connector Vehicle Wiring Harness part # C56320 is a confirmed fit for your 2017 Ford Escape (Excluding SE Models) and the trailer wiring harness I recommend you use because of its reliability. In regards to installation, the manufacturer does not give an install time estimate for this as it will largely depend on your experience level. That said, if you are a novice then I would allot 60 minutes or so but if you are a professional then I would allot only 30 minutes or...
    view full answer...
  • Recommended Trailer Hitch and Wiring for 2018 Ford Escape
    Starting with the trailer hitch I recommend the Draw-Tite Class III Max Frame Round Tube Receiver Hitch # 75758. This Class III hitch is confirmed to fit your 2018 Ford Escape and will use existing holes in its frame for a no-drill installation. It will provide you with a 2 inch receiver opening and has a 4,500 pound towing weight capacity. I also recommend verifying the towing limits of your Escape by looking through the towing section of your owner's manual. You will just need to follow...
    view full answer...
  • Running Power Wire for 4-Way Trailer Wiring on a 2018 Ford Escape
    I don't recommend connecting the power wire of the # C56320 to anywhere but the vehicle battery. Using the 12 volt outlet in the cargo area of your 2018 Ford Escape may not work properly. The converter needs to receive power from an isolated 12 volt circut and you really don't know if that circuit is isolated or not. There could very well be other components running off the same circuit. If it's not an isolated circuit you could be blowing fuses over and over again. I've linked a video...
    view full answer...
  • Will Installation of Trailer Wiring Harness Void Warranty on 2018 Ford Escape
    Adding the T-Connection Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56320 to your 2018 Ford Escape will not void the warranty on your vehicle. Aftermarket products such as this will not void the warranty because you are protected by what is called the Federal Magnusson-Moss Warranty Act. This states in part that if something breaks on your vehicle and you take it in for warranty repair, the dealer must honor your warranty unless whatever you have added to your vehicle...
    view full answer...
  • Trailer Hitch Recommendation for 2018 Ford Escape
    The best hitch we offer for your 2018 Ford Escape is the Draw Tite part # 75782 because it has the best towing capacities, best price, has a concealed crosstube so it will be less visible, and has a mounting bracket welded to the crosstube for mounting trailer wiring. For trailer wiring then the T-Connector kit part # C56320 is the best option. It's a custom fit kit for your vehicle and has the most reliable converter box so we recommend it the highest.
    view full answer...
    Image 1 for
  • Difference Between 4-Flat Harnesses for 2016 and 2018 Ford Escape
    The Curt 4-Flat Wiring Harness # C56335 will NOT work with your 2018 Ford Escape, you will need to use the Curt Wiring Harness # C56320. These plug-in harnesses are vehicle-specific fits and if you take a look at the accompanying photos you can see that the plugs are different on the harnesses.
    view full answer...
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Info for this part was:

Employee Mike L
Expert Research:
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Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
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Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
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Employee Cole B
Installed by:
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Employee Chelsea B
Written by:
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Employee Wilson B
Updated by:
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Employee Kristina F
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