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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
2010 Subaru Tribeca
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CURT

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

Part Number: C56049
In Stock
$46.70
Retail:$74.99
You Save: 38%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2010 Subaru Tribeca

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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 - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56049 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 (91)
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CURT Custom Fit Vehicle Wiring - C56049

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-way flat connector powers trailer lights for safe towing.
  • Plug-and-Play Install: T-connector plugs inline with tail lights—no cutting or splicing.
  • Reliable Signal Match: Built-in converter syncs vehicle and trailer brake, turn, and tail signals.
  • LED-Ready Design: Works properly with LED trailer lights without extra resistors or diodes.
  • Solid Grounding: Dedicated ground wire ensures stable lighting and prevents shorts or dimming.

Features to know about

Installs Cleanly with a Plug-In Connection: No Cutting or Splicing

Wiring a trailer doesn’t have to mean digging into factory circuits. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs straight into existing tail light connectors for a simple, no-splice setup. You get a clean installation that’s easy to reverse and doesn’t disturb your vehicle wiring.

Protects Vehicle Circuits: Built-In Converter Box

This harness includes a powered converter box that isolates the trailer wiring from the vehicle lighting system. It keeps the draw from the trailer lights off your factory circuits to prevent overloading or shorting. If the trailer has a wiring fault, it won’t damage your vehicle’s lighting controls.

Ready for Standard Trailer Lighting: 4-Flat Connector Output

The 4-pole flat plug delivers running light, brake, and turn signal power to your trailer. It’s the most common connector style for small utility trailers, boat trailers, and cargo haulers, so you can hook up and go without adapters.

Reliable Lighting Function: Designed for Solid Grounding

A poor ground connection is one of the biggest causes of trailer light problems. This harness uses a dedicated ground wire that must be secured to clean, corrosion-free bare metal, giving you consistent lighting performance under braking, signaling, and running lights.

Works with LED Trailer Lights: Efficient Power Transfer

LED trailer lights draw less current than incandescent bulbs, which keeps the converter from being overworked and ensures full brightness from your trailer lights. The Curt T-Connector’s design supports these low-draw LED setups for efficient, long-lasting performance.

Specs

  • Comparison image showing several Curt T-Connector vehicle wiring harness models with labeled connectors and converter boxes for trailer wiring applications

56049 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Tekonsha 118433 and Hopkins HM11143785

Installation Details C56049 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.9

91 reviews
Review sort icon
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.

by:

Product is great. Arrived in a couple of days. Site is very good. I love the videos showing the installation procedures.

Only issue was that there is no sound with the videos. I thought the sound on my computer failed, but it works for everything else. But even without sound the videos are a great help.

Price was very good. Very good experience with the site and the purchase



by:

Quick and simple pkug and play. Entire install was about 20mins only because I took my time and routed the trailer hook up wire though a plug hole for a cleaner look.



by:

This is my second hitch and harness, my car was in a wreck so I'm replacing the damaged hitch. This hitch is very easy to install and does the job well. etrailer provides great how-to videos and customer service.



by:

Easy plug and play install. If you can open the truck you can install this wiring harness. Great pictures and step bey step instructions



by:

This was much easier to install than I thought. Here's their video. Made life a lot easier.


Jon profile picture

Jon

7/30/2019

Product is still working great. Had never come loose and still feels as sturdy as when I installed it.



by:

The wiring harness for my 2006 hyauni sonata was very easy to install. It took me about 40 minutes from state to finish. Etrailer you are the best. Thank you

Chuck



by:

This harness was an exact match for my Hyundai, Sonata. The instructions were precise in details and photos. I installed and tested my trailer lights in less than an hour. Great product



by:

Worked as advertised. About a 10 minute install. A lot better than buying a 4 prong trailer plug and cutting and splicing into wires.



by:

Well made video made this a very easy installation. I haven't used this wiring harness yet, so I can't comment on it's actual integration with the vehicle and trailer or it's longevity. All items seemed to be well-made so don't doubt it will last. overall a great experience.



by:

I was amazed at how easy it was to install both the hitch and the wiring harness. The total job took 2 of us less than 45 minutes to complete.



by:

hitch mounting holes on bracket was a little off had to pull it in but nice finish, and wiring harness was easy plug and play.



by:

First, I would like to say that I received this product quickly and promptly. Furthermore, the communication was phenomenal. After opening the package and looking at the harness, I could tell this was going to be very easy to setup. Took a little time getting the panels in the trunk off, but once I did, everything was simple. One thing you will need to do is have a good ground. Either utilize the sheet metal screw is included and ground or sand an area to remove the paint. Ease of installing is 1 of 5 (very easy). Product reliability, not sure yet since I haven't actually taken it out on the road. Will recommend this harness and any other harness this company makes to anyone. No splicing or cutting, ease of installation is what you need, here you go.



by:

The wiring harness was a piece of cake to install. It took longer to remove and replace the plastic panel than it did to plug in the connectors and route the wires.



by:

Second hitch purchased from etrailer, quality same as the first ,excellent. Installation proceeded without any big issues. A floor jack helped make a one man installation simple. Wireing revealed a faulty brake light switch.



by:

I have used this hitch and wiring harness extensively over the past year. Works great, great value.



by:

This wiring harness was simple! Unlike other harnesses I've seen on the market (where you have to splice and reconnect wires) this kit was plug and play ready...couldn't have been much simpler! It also came with zip ties and adhesives for the 'extra organized' ones out there!



by:

I dreaded this part - installing the wiring. It was so simple. SO SIMPLE. And when I had my trunk panel off, I was able to determine that the jackwagons at my local body shop didn't tighten my trunk latch properly when they did some work - so this wiring kit helped me there, too. ALSO - It just worked. I plugged it into each tail light, plugged it into the trailer, and VOILA! Frickin LIGHTS! To be easier, I can only imagine chucking the unopened package at my unopened trunk and having it install itself, via some obscure nano-materials interaction process. But that's just silly. I'm keeping an eye on it, just in case - but man - what a good product for a good price.



by:

I watched the video and started the installation. It took less time than it said it would. Only thing I ran into was do NOT put the white ground wire to a bolt that is on the tail light assembly on the inside. I had a back feed to the trailer lights so both lights wound blink when turn signal was on. Ground it by screwing it to the body inside the trunk and it will work properly.



by:

Worked well for my 2007 Hyundai Sonata. I also purchased the Curt hitch receiver hitch and drawbar. All 3 of these Curt products work exactly as advertised and are holding up well after a year of normal use. I highly recommend them.



by:

I have an old trailer that I use to take yard debris and other trash to service center for disposal. It does not need lights but thought it would be best. Wow, the kit sent was like so easy to install. Everything fit and everything works great. Navigating the website was as close to perfect as I have seen. The amount of helpful materials was way beyond just what was necessary. Great job by everyone. My second purchase here and both were equally impressive.



by:

A must buy with the Sonata hitch, Take your time and make it look nice. Very easy install.I wrecked a couple plastic push in screws. Napa had them. Bring in the old one to match up.

Nd H. profile picture

Nd H.

12/21/2022

Excellent, thanks for saving me money. Love your products. Send 50 off coupons, cause Im so nice.



by:

This is one outstanding product. There's no cutting and splicing of wires. Why didn't someone think of this before? It took far longer to remove the car's cover panels than to connect this wiring harness. Also, to my amazement, the instructions were specific to my vehicle, including pictures! I have just one problem with this product. It's connector doesn't make reliable connection with the trailer's connector. I have to wiggle the connectors and play around till all lights are working, and then I have little confidence that they will stay working till I get where I'm going. The problem is not on the trailer end because I never had any problems with the connector on the previous wiring harness.



by:

I put two new trailer light sets on my trailer and only one side will work. Both sides work with other wiring harnesses

Heather A. profile picture
Etrailer Expert

Heather A.

5/22/2021

Thank you for your review. It sounds like you are having a common ground issue. In most cases when some trailer lights work and others dont it is the ground connection on the vehicle side or the trailer side. You want to make sure the wiring harness ground connection is grounded to a clean bare metal surface free of dirt or paint.



by:

All harnes Mach perfect. Only plug and unplug connectors. 5 minutes job is dam



by:

4 hitches in 4 years, plus plug-in harnesses. Everything always fit and functioned properly. The installation videos are superb. A very painless and stress-free experience. Thanks


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

  • Trailer Wiring Harness for a 2014 Hyundai Sonata GLS
    We do have a wiring harness that will fit your 2014 Hyundai Sonata GLS. One option is Tow Ready harness # 118557. I checked with Curt and you can also use harness # C56049. I have included a link to the installation instructions for you.
    view full answer...
  • Recommended Hitch for a 2011 Hyundai Sonata
    Hey Doug. Not sure who you talked to but there are no 2" hitches available for the 2011 Hyundai Sonata. However, that doesn't mean you can't tow your dirt bike. To add a hitch to your 2011 Sonata, I recommend the Curt item # C11025. This is a class I, 1-1/4" hitch, with a 2,000 lbs towing capacity, and a 200 lbs maximum tongue weight. It fits all models of the 2011 Sonata with no exclusions for the sedan or even a hybrid. We actually installed this hitch on a 2011 Sonata awhile back....
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  • Trailer Brake Lights Do Not Work After Installing Curt Trailer Wiring Harness # 56049
    It sounds like a bad ground connection. What you will do is disconnect the trailer from the vehicle. Then make sure the ground for the wiring harness # C56049 is attached to a clean and corrosion free bare metal surface. Use a circuit tester like # PTW2993 if you do not already have one to test the pins on the 4-Way while someone sits in the vehicle and goes through all the lighting functions. If the brake lights/turn signals still do not work use hte circuit tester to test the wires going...
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  • Trailer Brake Lights Not Working with Curt Wiring Harness Installed on 2009 Hyundai Sonata
    It could still be a ground problem. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light but can show up any time. Since the brake lights draw more constant power than any of the other functions it makes sense that a ground problem would show up when using the brakes. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside...
    view full answer...
  • Which Curt Trailer Wiring Harness Fits 2013 Hyundai Accent Hatchback
    The correct Curt trailer wiring harness for your 2013 Hyundai Accent Hatchback is the part # C56254 and not the # C56049 as it only fits Sedans. I put a note in your order notes that you are going to need to cancel and reorder the correct kit.
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  • All Parts Needed to Tow U-Haul Trailer With 2011 Hyundai Sonata Non-Hybrid
    Appreciate that info and we can go ahead and get you all the parts you need, including the ball mount, to tow the U-Haul trailer with your 2011 Hyundai Sonata non-hybrid. I'll go ahead and list them for you below: - Curt Trailer Hitch Receiver # C11025 - Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56049 - Curt Class II Euro Style Drawbar with 1-7/8" Ball - 5-1/8" Rise # C45591 - Hitch Pin and Clip # F-4 Both the hitch and wiring harness are fits for your '11 Sonata,...
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  • Parts to Transport Mobility Scooter With a 2006 Hyundai Sonata
    It looks like the only hitches available for your 2006 Hyundai Sonata have a Class I rating so you're going to need to use a trailer to transport the scooter as opposed to a hitch-mounted lift. This is due to the 200 lb tongue weight rating of the hitch itself which, to my understanding, the scooter would already be pushing the limits for. If you're interested in going this route then I recommend using the following parts: Curt Trailer Hitch Receiver - # C11325 Curt T-Connector Wiring...
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  • How to Determine Wire Functions to Install Curt 4-Way Wiring Kit C56175 on a 2010 Hyundai Sonata
    We actually offer plug-in wiring like part # C56049 for the 2010 Hyundai Sonata that will prevent you from having to do any testing or splicing. It plugs in between the taillights and the factory tail light wiring. View the installation instructions at the link provided. If you would rather install the # C56175 hardwire kit, you will need to use a circuit tester on the wires behind your taillights to find out which function each wire carries. We offer part # PTW2993, if needed. Have...
    view full answer...
  • Left Side Trailer Lights Do Not Work When Vehicle Lights are On
    This sounds like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare...
    view full answer...
  • Will the Curt Wiring Kit # C56049 Fit a 2017 Hyundai Sonata
    There were some changes to the connectors for the taillights from your 2011 Hyundai Sonata to your 2017 Hyundai Sonata that won't allow the connectors on the Curt # C56049 to be compatible with the taillight connectors on your 2017 Sonata. This change occurred between the 2014 and 2015 model year Sonatas. If you look at the 2 pictures that I have attached you can see the difference in the Curt # C56049 for your 2011 Sonata and the Curt # C56247 which is confirmed to fit your 2017 Sonata. I...
    view full answer...
    Image 1 for Image 2 for
  • Trailer Wiring Harness for a 2013 Hyundai Sonata Hybrid
    I checked with the manufacturers we carry and there is an option from Hopkins, # 46365. But this is a hardwire wiring harness and not a plug and play type of harness. This means you will have to test the vehicle wiring with a circuit tester such as # 3808 and then splice in the harness wires accordingly. You will want to consult your vehicle owners manual for information on towing with the Sonata. Many hybrids are not rated for towing and the hitches for them should be used only for accessories...
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  • Trailer Hitch And Wiring Recommendation For 2012 Hyundai Sonata
    You will first want to check your owner's manual or with your dealership to make sure you can tow with your 2012 Hyundai Sonata. We do offer trailer hitches that are designed to fit your Sonata. I recommend the Draw-Tite Trailer Hitch, part # 24965. This is a Class l trailer hitch and has a 1-1/4 inch receiver opening. I have attached the install details for this hitch you can check out. For a ball mount I recommend part # 3593. This ball mount can be used with either a 2-1/8 inch rise...
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  • Trailer Wiring Recommendation for a 2011 Hyundai Sonata
    Since your 2011 Hyundai Sonata is a non-hybrid model you would want the part # C56049. The # C56049 does not require running a wire up to the vehicle battery so it would be exactly what you want. Some vehicles have pretty delicate taillight wiring circuits so it is necessary to power the trailer taillights from the battery to protect them.
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  • Troubleshooting Trailer Blinkers that Operate Both Sides of Trailer Lighting
    First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # PTW2993 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. Most likely there is a short between the two stop turn circuits on the trailer from exposed wire that sends both of the blinker circuits...
    view full answer...
  • Why Would Stoplights and Turn Signals Not be Bright on Trailer Wiring
    There may have been a slight weak ground that was allowing some of the lower power draw functions to still work. The grounds on both the trailer side and the vehicle side, as well as the grounds for all of the trailer lights will need to be attached to clean and corrosion free bare metal surfaces. A weak ground issue would show up as soon as there is higher power draw on the system. Brake lights light up brighter and require more power so that is when the issue showed up. Making sure...
    view full answer...
  • Can Wiring Harness # 118433 from 2010 Hyundai Sonata Fit 2014 Sonata Non-Hybrid Model
    Thank you for your 2011 purchase of a wiring harness. That actual part you ordered is Tow Ready harness # 118433 which is intended for 2006 through 2009 model years of the Sonata. It is not a confirmed fit for the 2010 Sonata, please note. The recommended harness for your 2014 Hyundai Sonata non-hybrid is Curt # C56049 which is shown in the linked video. This harness installs without any cutting or splicing of wires thanks to its custom-fit connectors. There is no resetting function for...
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  • Trailer Wiring Harness Recommendations for 2012 Hyundai Sonata
    Both the Curt # C56049 and the Tow Ready # 118557 would work with your 2012 Sonata. The primary difference between the two is that the Tow Ready model is a powered converter that obtains the power to drive the trailer taillights directly from the battery, instead of pulling the power through the taillight wiring. The converter obtains its switching signals from the taillight circuits only. This provides a more reliable power supply and another layer of protection for the vehicle wiring...
    view full answer...
  • Do I Need Diodes or Resistors For Trailer Wiring Harness Installation on 2014 Hyundai Sonata GLS
    Since the Tekonsha # 118557 and Curt # C56049 are powered by a connection to the battery and have converter boxes, there aren't any issues when using them with LED tail lights on your 2014 Hyundai Sonata GLS; you won't need to use any diodes or resistors to make your harness work properly to power your trailer lights. I do recommend using the Tekonsha # 118557 since we've found that the powered Modulite converters on these harnesses are much more reliable than some of the others available....
    view full answer...
  • Trailer Lights Not Working and Brake Lights Only Work with Ignition Turned Off
    This sounds like a ground issue and possibly a short somewhere. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light but can show up any time. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should...
    view full answer...
  • Why is Powered Converter Type Trailer Wiring Harness Needed for 2013 Sorento SX
    All of our 4-pole trailer wiring harness kits for your 2013 Kia Sorento SX V6 without factory tow package are shown on the linked page, such as # C59496. All use a powered converter, which means that rather than simply plugging in to your taillight wiring and using the car's internal wiring to transmit signals for the trailer, these powered converters protect the car's wiring by delivering power for the trailer lights from a separate power connection at the battery. Each kit includes a...
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  • Troubleshooting Brake Lights After 4 to 5 Way Flat Adapter Installation
    When all but one light functions fine, the issue can sometimes be that the harness is not connected securely or there's an insufficient or short to a ground on either the trailer vehicle side. There are other potentials as well but to start let's follow these steps to troubleshoot. Test at the 4-way plug with a circuit tester # PTW2993 for correct functioning. I have included an instructional video of what steps to take. If any function does not have correct power, test the wire going...
    view full answer...
  • Trailer Brake Lights Go Out When Brakes Are Applied on a Trailer Towed by 2009 Hyundai Sonata
    You will want to look at the grounds and wiring for the lights themselves. This sounds like a ground or short circuit issue. Trailer lights ground through the mounting studs unless there is an obvious ground wire. In either case the grounds need to be attached to clean and corrosion free bare metal surfaces. When you inspect the wiring, look for any nicks with exposed wire that could be touching the metal trailer frame. This would cause a short. I have included a link to our wiring FAQ...
    view full answer...
  • Troubleshooting Trailer Wiring on 2009 Kia Optima that Stops Working When Plugged into Trailer
    I spoke to my contact at Curt and after I explained to him your situation he said the problem is either you are overdrawing the converter box of the # C56049 or are overdrawing the taillight circuits of your 2009 Kia Optima. His advice was to convert your incandescent trailer lights to LEDs as they draw considerably less which should fix your problem. I attached a link to the right that has all of the LED trailer lights we offer.
    view full answer...
  • Can Converter Box of Trailer Wiring Harness be Tested for Function
    It is very possible the converter box has gone bad but there is a way to test the box. What you will want to do is test the wires going into the box of the converter box for voltage with a circuit tester like the # PTW2993 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then test the output side of the box to see if the current is making it through the converter. If not then the problem is that the converter box has shorted itself...
    view full answer...


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Info for this part was:

Employee Lindsey S
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Lindsey S
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Employee Kristina F
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Employee Isabelle B
Updated by:
Isabelle B
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
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Employee Chris R
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