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2020 Coachmen Chaparral Fifth Wheel
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CURT

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

Part Number: C56348
89 Reviews | 22 Questions
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$65.95
Retail:$115.95
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 Custom Fit Vehicle Wiring
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2020 Coachmen Chaparral Fifth Wheel

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curt custom fit vehicle wiring end connector plug-in c56348
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curt custom fit vehicle wiring trailer hitch end connector t-connector harness with 4-pole flat
curt custom fit vehicle wiring trailer hitch plug-in t-connector harness with 4-pole flat connector
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2018 hyundai tucson custom fit vehicle wiring curt end connector 4 flat on a
2018 hyundai tucson custom fit vehicle wiring curt trailer hitch 4 flat t-connector harness with 4-pole connector
2018 hyundai tucson custom fit vehicle wiring curt end connector 4 flat c56348
2018 hyundai tucson custom fit vehicle wiring curt trailer hitch plug-in on a
2018 hyundai tucson custom fit vehicle wiring curt 4 flat plug-in c56348
2018 hyundai tucson custom fit vehicle wiring curt trailer hitch plug-in t-connector harness with 4-pole flat connector
2018 hyundai tucson custom fit vehicle wiring curt trailer hitch end connector on a
2018 hyundai tucson custom fit vehicle wiring curt end connector plug-in c56348

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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 C56348 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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CURT Custom Fit Vehicle Wiring - C56348

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-flat connector powers trailer lights for safe towing.
  • Plug-and-Play Install: T-connectors link behind taillights—no splicing needed.
  • Protected Circuits: Powered converter draws from battery to shield vehicle wiring.
  • LED Compatible: Works with trailers using LED lights for reliable signal output.
  • Clean Mount Option: Harness routes outside hatch for easy bracket mounting near hitch.

Features to know about

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

Wiring a trailer can be tricky, but this Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector takes the hassle out of it. It plugs directly into the factory tail light connectors, so there’s no need to cut or splice wires. The converter box protects your vehicle’s wiring and supplies the power needed for proper trailer light operation.

Protects Vehicle Circuits: Powered Converter Design

Some vehicles can’t handle the extra load from trailer lights on their own circuits. This harness draws power straight from the battery through its powered converter, keeping the vehicle’s tail light system safe. The converter isolates and powers the trailer lights without overloading factory wiring, helping to prevent shorts or blown fuses.

Covers All Basic Trailer Lighting: 4-Flat Output Connection

The 4-flat connector gives you all standard lighting functions—running, brake, and turn signals—so your trailer stays visible and compliant on the road. The connector routes cleanly outside the hatch for easy access when towing, and it pairs well with an optional mounting bracket for a tidy setup.

Built for Reliable Performance: Solid Ground and Sealed Connections

Good grounding is key for consistent lighting, and this harness includes a dedicated ground wire designed for a clean, secure metal-to-metal contact. The high-quality connectors resist corrosion and ensure a tight fit, giving you dependable power delivery every time you hook up your trailer.

Simplifies Setup with Clear Layout: Behind-the-Taillight Installation

The harness installs behind each tail light and then runs a single power wire to the battery. It’s straightforward to route and secure, allowing you to finish the job with standard tools. Once installed, you’re ready to tow with confidence knowing your trailer lights will work exactly as they should.

Specs

Electrical Specifications

  • Output Connector: 4-Pole Flat Trailer Connector
  • Input Type: Plug-In T-Connector
  • Converter: Included
  • Power Source: Direct connection to vehicle battery (no tow package required)
  • Design: Plug and Lead configuration

Comparison chart image showing multiple Curt T-Connector vehicle wiring harnesses with labeled callouts for different models and connector configurations.

Compatibility

  • Vehicle Fit: 2010–2019 Hyundai Tucson
  • Application: Vehicles without factory tow package
  • Lighting System: Compatible with both standard and LED taillight systems

56348 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Replaces Curt C56277

Similar to Tekonsha 118501

Installation Details C56348 Installation instructions

This Product Fits The Following Vehicles






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Customer Satisfaction Score:

Ratings & Reviews

4.5

89 reviews
5 Stars
(69)
4 Stars
(7)
3 Stars
(7)
2 Stars
(2)
1 Star
(4)
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by:
Direct fit, plug and play. Wiring correct length. Great product.
Dillon profile picture

Dillon

3/22/2026

A year into owning this harness, still performs great. Use it every other weekend with either a 8ft trailer or a custom hitch rack with lights.

by:
2018 Hyundai Tucson
Easy install if you follow along with the video. Lots of crawling around under the car if you don't have a lift, but nothing particularly difficult, just awkward. I saw others complain about the short wires on the driver's side tail light connector but I didn't think it was bad. Also comes with plenty of zip ties if you route the wire the way they do in the installation video, but if you don't loosen the panel to tuck it in with the main wiring harness I could see how you might need more.
by:
2017 Hyundai Tucson
Easy install, plug n play to its max very easy to follow the instructions and videos
by:
Wiring harness fit was excellent. I watched the installation video you provided, very helpful.
Steve profile picture

Steve

5/5/2025

Excellent

by:
All good great product great timing on shipping
by:
2012 Hyundai Tucson
It works, no directions included but not to hard to figure out
by:
It’s a little more tucked away than I thought it was gonna be but it still looks great !
by:
Aftermarket wiring harnesses can be frustrating. I don’t enjoy mechanic work but I removed taillights and ran wire according to the instructions. After repairing a bad connection, everything worked. Then, my lights began to short out and malfunction on a trip. It turns out that the main wire going to the plug wore through and was touching metal. I ordered another identical kit but placed the wire in plastic automotive conduit before routing it underneath my vehicle. It’s been great ever since. Spend the extra time and money to do it right.
by:
Easy to follow instructions, quality materials and everything included .
by:
2016 Hyundai Tucson
Overall not to bad, but not like in the youube video. The wires are to short on the passenger side of the car. When you plug in to wires at the tail light the wires that go to the junction box are about 18" to short. There is no way to mount the box on the frame like they show in the video. I just left it inside below the light fixture dangling, hopefully it will work over a period of time. I guess I could have spiced extensions on the wires but for what you pay for this light kit, it seems they are a little chinsey on the wire length. Plenty of green wire going over to the passenger side tail light. At least everything fit!
by:
So easy to install! The wiring harnesses interfaced perfectly with the car lights for a super simple connection. Plenty of extra length to allow you to position the connectors however you needed.
by:
The wiring kit for my 2017 Hyundai Tuscon, that was very easy to install. I also ordered the hitch from here, bolted it on by myself, the whole thing didn't take long at all.
by:
Best site I’ve found for trailer hitches. Videos are very helpful. Hitch and wiring install was straightforward. No issues.
by:
Overall the product does what it is desgined to do however 2 tips would be the wire to the drivers side light needs to be atleast 1ft longer and you should probably mount the box to the frame the double sided tape wasn't enough. But in order to do that you need the drivers side wire to be longer otherwise its up in the body of the car. But otherwise works as planned.
by:
2016 Hyundai Tucson
Directions were a little confusing but overall not bad. Not the easiest hookup but was on a new 2016 hyundai tuscon. I would recommend this wire harness again especially if someone has some knowledge of cars. Not for the guy who cant change his own oil or air filter, it would be too complicated.
by:
2016 Hyundai Tucson
This is the third trailer wiring harness I have bought from e-trailer...Installed fine and works perfect....
by:
Simple installation!
All the connectors fit together as intended.
It's been installed for over a year without any issues.
by:
Everything was included that was needed for the install. For some reason my vehicle needs a wire that runs from the rear of the car all the way up to the positive side of the battery terminal under the hood, which makes it a separate circuit with its own fuse. By removing the lower black plastic molding under the doors the wire can be neatly tucked inside for most of the way.
works great.
by:
2016 Hyundai Tucson
I got it to work... wire lengths weren’t optimal for a 2016 Tucson. The harness for the drivers side was a bit short forcing me to mount the controller in an awkward place.
by:
It was a great fit Thanks
by:
Little difficulty running power wire. Wish it was a little more plug and play. However worked very well once installed
by:
2016 Hyundai Tucson
The drivers side was made way too short. The power converter black box was up inside the fender area without any way to fasten it to vehicle. On another day, I will probably end up cutting the harness and extending the wiring somewhere between 6-10 inches at least.
by:
Wiring Harness was very easy and quick to install and after a year on the vehicle there have been no issues. Product did arrive fairly quickly also. Seems to hold up well with salty conditions of our winter too
by:
Went on quick and easy. wireing harness worked out good too
by:
2018 Hyundai Tucson
Awesome product wish it had a little bit of more slack on cable running to tail lights but away from that easy to install and completely hide away,can't wait to hook up my little travel trailer to it
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?
  • Installing The Curt T-Connector Vehicle Wiring Harness C56348 On A 2015 Hyundai Tucson
    Hi Jason! The Curt T-Connector Vehicle Wiring Harness # C56348 can be wired exactly the same as the Tekonsha T-One Vehicle Wiring Harness 118501. The instructions technically don't say that, but there is no reason you can't. Just follow the Tekonsha instructions and you are good to go. What are you going to be towing?
    view full answer...
  • Right Turn Signal Always Has Power When Testing 4-Way with Circuit Tester
    It sounds like you have a classic ground issue with the Curt T-Connector Vehicle Wiring Harness part # C56348. When testing the 4-Way with a tester like Curt LED 4-Way Flat Connector (Vehicle End) Tester part # I26 the right turn like should only light up when you activate the right turn function. If it is always illuminated like you mentioned, I recommend to make sure the ground wire of the harness is attached to a clean bare metal surface on the frame. If you don't have a proper ground...
    view full answer...
  • Taillight Removal 2012 Hyundai Tucson to Install Curt T-Connector 4-pole Wiring Harness
    After reviewing the notes on your order I see that you now have the correct Curt T-Connector Wiring Harness specifically fit for your 2012 Hyundai Tuscon, # C56348. The Curt T-Connector 55528 that you referenced is considered a fit for Hyundai Tuscons from 2005-2009. After discussing the difficulties that you are describing with both Curt and fellow experts, it is not uncommon that the taillights of your vehicle are difficult to remove. It sounds like the mounting pegs are very snugly...
    view full answer...
    Image 1 for
  • Why Does Trailer Wiring for 2014 Hyundai Tucson Require Running Wire 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. For your 2014 Hyundai Tucson you need to install a harness that draws power from the battery to protect the taillight circuits like the part # 118501...
    view full answer...
  • Recommended Hitch for a 2015 Hyundai Tucson
    I have a solution for you but the Curt Trailer Hitch item # C13900 will not fit your 2015 Tucson and even if it did it wouldn't increase your vehicles towing capacity. It looks like the 2015 Hyundai Tucson has a maximum towing capacity from 1,000 lbs to 3,500 lbs depending on the model. You can call a dealership and give them your VIN and they'll tell you yours. To add a hitch to your Tucson, I recommend the Curt Trailer Hitch item # C13066. This hitch is custom fit and bolts to your Hyundai...
    view full answer...
  • Trailer Hitch and Wiring for a 2016 Hyundai Tucson
    Trailer wiring harnesses for your 2016 Hyundai Tucson, # C56348 and # 118501, both install the same way. They connect to the vehicle in 3 places: behind each of the tail lights and to the battery. The power wire has to be connected to the vehicle battery because no other 12 volt power source is appropriately rated for this application. I have included a link to our help article with tips on routing the power wire. If you do not already have a trailer hitch then you could use # C13240....
    view full answer...
  • Hitch Recommendation for a 2016 Hyundai Tucson
    The Curt Hitch part # C13240 that you referenced has been confirmed to fit your 2016 Hyunda Tucson so I would recommend it for you. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage bag. If the ball mount kit does not include a ball mount with the...
    view full answer...
  • Troubleshooting Trailer Wiring on 2017 Hyundai Tucson Where only One Light Stays on Always
    What you described sounds exactly like the converter box of the Curt trailer wiring harness part # C56348 being shorted out. The boxes of these harnesses are designed to basically sacrifice themselves in the event of a short so that it prevents the short from making it to the vehicle's wiring. So the good news is the box did it's job, but the bad news is you have to replace the trailer wiring harness. The kit we offer for your 2017 Tucson that is the most resistant to shorting out is the...
    view full answer...
  • 2016 Hyundai Tucson Trailer Hitch and Wiring Recommendation
    For your 2016 Hyundai Tucson, the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C13240 is a custom fit. For the wiring harness you are seeking to go with it, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56348. This harness does route outside your hatch so you don't need to store the connector inside. I recommend using the mounting bracket # 18144 which can attach to the plastic shroud near the hitch for a very clean look.
    view full answer...
  • Tips for Trailer Wiring Harness # C56348 Seeming Too Short for 2016 Hyundai Tucson
    The Curt trailer wiring harness part # C56348 that you referenced is a fit for your 2016 Hyundai Tucson but you aren't the first to notice that the harness is a bit too short. We have had a few people leave reviews for this harness stating that it was a bit too short and then offering the solutions that worked for them. I attached pictures of a couple of these for you to check out.
    view full answer...
    Image 1 for
  • Custom Fit Wiring Harness for a 2015 Hyundai Tucson with LED Lights
    The Curt tail light with converter hardwire kit # C56348 is the only kit Curt offers that works with your 2015 Tucson with LED lights.
    view full answer...
  • Troubleshooting Solid Red Lights on Trailer Towed by 2013 Hyundai Tucson with Curt 4-Pole Harness
    On a 4-pole wiring harness like Curt part # C56348 that fits your 2013 Hyundai Tucson the brake and turn signal light functions are carried on the same wire; green for the passenger side and yellow for the driver side. The brown wire carries the tail light (also called a running light) signal for both sides of the trailer. Which lights remain on? I suggest you test the trailer wiring without it plugged in to the vehicle. This is easy to do, using either the vehicle battery or a spare as...
    view full answer...
  • Installation of Curt Trailer Wiring Harness on 2017 Hyundai Tucson
    I've heard the driver's side wires referred to often as shorter than ideal causing mounting further into the body of the vehicle but never too short to fit. Anywhere you can secure the module is sufficient but you may need to use zip ties instead of the included tape. The manufacturer confirms the fit for all 2010-2019 Tucson models. Let me know if you need further help, and if so please include pictures of the issue for reference.
    view full answer...
  • Curt T Connector Wiring Harness Fit for 2015 Hyundai Tucson
    Yes, the Curt T-Connector Wiring Harness # C56348 will work well with your 2015 Hyundai Tucson. I have attached the installation details for you.
    view full answer...
  • Troubleshooting Curt Trailer Wiring Harness Installed on 2010 Hyundai Tucson
    Unless your trailer is unusually well lit, the # C56348 wiring harness should have plenty of capacity. From your description, it sounds like your converter has an internal short that is allowing the 12-volt feed from the battery feed back into the vehicle taillights. You can confirm this by using a circuit tester like part # 40376 on the inputs of the converter. With the vehicle shut off, you should only see power on the 12-volt battery feed. If you find power on any of the other wires,...
    view full answer...
  • Parts Needed To Tow a Trailer with a 2018 Hyundai Tucson
    I am not sure what you mean by stabilizer bar but there are going to be three components required for you to tow your trailer if it does not have brakes or five components required if it does. I have listed these parts for you below. Without Brakes: Curt Trailer Hitch Receiver part # C13240 Curt T-Connector Vehicle Wiring Harness part # C56348 Curt Towing Starter Kit part # C45534 With Brakes: 7-Way RV Upgrade Kit for Trailer Brake Controller Installation part # ETBC7L Curt Echo Mobile...
    view full answer...
  • Recommended Trailer Wiring Harness and Brake Controller for 2011 Hyundai Tucson
    You are correct in that there are two trailer wiring harnesses available that are confirmed to fit your 2011 Hyundai Tucson; the Tekonsha T-One # 118501 and the Curt T-Connector # C56348. Both of these harnesses will install the same way on your vehicle and the only real difference between the two is the manufacturer. I recommend going with the Tekonsha T-One Vehicle Wiring Harness # 118501, as Tekonsha is well-known for producing reliable electrical products. I have attached an installation...
    view full answer...
  • Troubleshooting 4-Pole Wiring That Lights Up LED Tester But Does Not Operate Trailer Lights
    A lighting tester that uses LEDs, like the one in your photo, will take very little power to illuminate. Test light LEDs are so sensitive that they will sometimes light up even when no signal is activated; this can occur from the low-level residual power that some wiring kits put out. The powered 4-pole trailer wiring harnesses available for your 2014 Hyundai Tucson include Curt product # C56348 and Tekonsha # 118501. If none of the trailer lights work, you can test to find the issue....
    view full answer...
  • Troubleshooting Trailer Wiring Installed on Vehicle that Prevents Blinkers from Working
    Typically the issue you are having is just the connectors of the trailer wiring harness not making a solid connection. Disconnecting them and then reconnecting them typically clears out any issues but you might check the conditions of the pin to make sure a solid connection is being made. The converter box of the harness # C56348 does not affect the wiring of the vehicle so it most likely not be the issue.
    view full answer...
  • Trailer Hitch and Wiring Recommendation for a 2015 Hyundai Tucson
    Actually the Curt Hitch part # C13120 does not require the use of a stabilizer strap when carrying a non-supported load like a bike rack. The other Curt hitch part # C13066 that has been confirmed as a fit for your 2015 Hyudai Tucson would require the use of the strap since it is not rated for use with a weight distribution system. If a Curt hitch is not rated for a WD system then they recommend the use of the # 18050. If you have LED trailer lights the correct wiring harness would be...
    view full answer...
  • 2016 Hyundai Tucson Limited Trailer Hitch Recommendation
    I checked with Curt and the Hitch part # C13240 has been confirmed as a fit for all models of the 2016 Hyundai Tucson so it should work well for you. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage bag. If the ball mount kit does not include a...
    view full answer...
  • Recommended 4-Pole Wiring Harness and Mounting Bracket for 2016 Hyundai Tucson
    The two 4-pole wiring harness kits offered for your 2016 Hyundai Tucson, Curt # C56348 and Tow Ready # 118501, will have an identical installation procedure, but I recommend the Curt since it saves you a few bucks and has a higher current output. This higher output simply means less chance for the trailer lights' power demands from overloading the harness and blowing the included fuse. I have linked an installation video and help article that will show you the entire installation process. If...
    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 Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Amanda M
Written by:
Amanda M
Employee David F
Test Fit:
David F

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