Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2019 Volvo XC90
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2019 Volvo XC90
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Wiring a trailer doesn’t have to mean cutting into factory wires. The Curt T-Connector plugs directly into the vehicle’s rear wiring connectors for a clean, no-splice setup. It’s built for vehicles without a factory tow package and provides a 4-flat trailer connector ready for running lights, turn signals, and brake lights.
Instead of pulling power from the vehicle’s tail light circuits, this harness uses a powered converter that runs a hot lead wire to the battery. That setup draws power safely from the source while protecting sensitive electronics from overload. It’s the right way to handle today’s LED and Canbus lighting systems without triggering errors or dimming issues.
No matter what kind of lights your trailer has, this harness handles them. It’s compatible with both LED and incandescent taillights, giving you a solid signal every time. Whether you’re towing a small utility trailer or something with full LED lighting, everything stays bright and in sync.
The harness routes neatly through existing grommets in the rear cargo area for a hidden, factory-style finish. Once installed, only the 4-flat connector is accessible when you need it, keeping things tidy when you don’t. It’s an easy way to add trailer wiring without leaving exposed or messy runs.
This will not affect how the tail lights on your vehicle operate.
Customer Satisfaction Score:
80% were satisfied with this product
20% of customers were not satisfied
Ratings & Reviews
Did exactly what it was designed to do and worked great.
Easy to install works perfectly.
Item works well, easy install works as described.
Fast delivery.
going to use this to light up my trailer.
great price and great delivery!!
Quick and easy installation.
Better than I expected ! Quality was excellent and instructions where clear and precise. It took less than thirty (30) minutes to install.
I don’t know if I ordered the wrong one or if I was sent the wrong one. I ordered the correct part number this time so I’ll have to return the other.
Quick, easy, efficient customer service. Quick delivery easy installation.
Good luck with the 12 volt power supply wire. Pain in the booty. Product works as advertised.
Installed quickly, running the power wire to the front was not easy, not enough zip ties supplied with kit
The kit for led tail lights was a great package everything was included! Very easy to install but a little time consuming running the power wire
The trailer wiring harness is perfectly fit.
Plug and play very easy to install Also you guys are awesome. I will buy more from you guys. Thank you
If it weren't for the fact of having to run a hot wire from the battery, the installation on my 2015 Accord was easy thanks to good installation instructions
Works perfectly for 2017 Honda Accord Hybrid. Installation directions were easy to follow. Hardest part was to run the cable from the trunk to the battery which took some time. Other than that, works with no issues.
Installation was fairly easy, the hardest part is running the power line up to the battery, I ran the power cord under the car inside of a plastic wire protector, that made the installation much easier.
The rest of the unit plugged right in and worked perfectly.
I am very satisfied.
THE HITCH INSTALLED WITH NO PROBLEMS. REGARDING THE HEAT SHIELDS I ONA HAD TO MAKE A SMALL NOTCH ABOUT 1 1/2 INCHES LONGAND BEN THE METAL AWAY.
THE WIRING WENT A LITTLE HARDER BECAUSE I HAD NO HOIST TO RAISE THE CAR UP. I TRIED TO RUN THE POS. WIRE FROM THE BATTERY INSIDE BUT FOUND THAT TO DIFFICULT SO I RAN IT UNDER THE CAR IN JACKED LINE CORD. EVERY THING CHECKS OUT OK. WILL HAVE TO WAIT FOR MY TRAILER. LEN J.
I ordered the wrong wiring harness by mistake and they were very help full in returning and reordering the correct harness. It all went together as per instructions. I also ordered a trailer hitch that was very easy to mount. Great company!
Plug in wiring went very well. I should have looked into how to remove buttons frist as I broke several before I figured it out. Running the 12 VDC power wire was the hardest part of the job. Install hitch also which went very well. Very happy with etrailer.com service.
This vehicle wiring harness was a replacement for the harness I had purchased and had installed by the dealership when I bought the car new. Unfortunately, that had been the wrong kit. Didn't realize at the time the car was purchased that it had LED taillights. As a result, while the turn signals and brake lights on my trailer worked, the taillights did not. This new kit for 2013-15 Honda Accords with LED taillights installed easily and now all the lights function perfectly.
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Hopefully this is not too critical. The harness seems to do the job but the connectors do not click in like the factory ones. Not 100% confident that they will stay connected.
The C56173 harness works great on my 2013 Honda Accord EXL V6 model with LED tail light. It was easy to install thanks to connectors that fit as advertised no cutting required. You do have to run a 12 volt power cable from the battery to the trunk. This was easily accomplished using my oil change ramps purchased from Auto Zone to get under the car. Once elevated I was able to slide under the car and route the +12 volt wire from the battery to the rear of the car along existing paths excellent for tie wraps. After you get your 12 volt wire to the rear of the car there are existing factory holes along the left side of the trunk with rubber grommets that allow you to get the wire into the trunk without drilling. I would recommend this quality product for purchase.
Hooked up one (Honda Accord) of two we bought, the hitch installed relatively easily and works like a champ. I haven’t been brave enough to rewire and install the trailer light kit yet.
The second hitch we bought (Honda Odyssey) is still in the box. Turns out we probably did not need it and will wait until we eventually buy a new Odyssey some day.
worked just like it should
The wiring harness works flawlessly. The installation is a bit difficult as you need to Fish the wiring from the battery under the hood to the trunk and pull several panels and hide it, but other than that, the harness is good to go.
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.
Brooke M.
7/28/2022
It might put your mind at ease to know that we request reviews on year post purchase and we have never heard of anyones connectors coming apart.