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The Curt T-Connector Vehicle Wiring Harness is your answer to quick and easy trailer connections. With its plug-and-play design, installation is a breeze—no cutting or splicing of wires required. Just connect it to your vehicle’s existing wiring system located in the rear cargo area, making it the perfect solution for those looking to avoid the hassle of complex wiring tasks.
What sets this wiring harness apart is its custom-fit feature. It's designed specifically to maintain the original wiring integrity of your vehicle, ensuring that all connections fit seamlessly without overloading your vehicle’s electrical system. This custom design not only matches but enhances the electrical configuration of your trailer lights for consistent, reliable performance across all road conditions.
Handle various trailers with ease thanks to the Curt T-Connector's compatibility with 5-pole, 6-pole, and 7-pole adapters (though these are sold separately). This versatility means you can switch trailers effortlessly, whether you’re hauling a small utility trailer or a larger camper, making your towing capabilities as versatile as your lifestyle demands.
This wiring harness includes a powered converter that not only reduces strain on your vehicle’s wiring but also maximizes trailer light yield and intensity, ensuring top-notch illumination with minimal heat production. It’s constructed using surface-mount technology (SMT) to offer dependable performance even in the most challenging road conditions, keeping you safer on your towing adventures.
Designed with durably constructed components, this wiring harness stands up to the rigors of rough road conditions. Whether it’s dirt trails or bumpy urban streets, rest assured that this harness is built to last and won't let you down when it matters most.
No more worrying about dirt and moisture affecting your connections. The integrated dust cap keeps your 4-way flat connector clean and protected when not in use, enhancing the longevity and reliability of your towing connections.
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I was able to replace an aged five-pin connector on a boat trailer I just purchased with this harness. It was quick and easy and a solid value priced product. Super happy with my purchase!
Install was straight forward. Took me a little over 1 hour to install the hitch and wiring harness. Price was great. The dealer wanted 1100 dollars.etrailer was 300 dollars.
It was a plug and play.
Brooke M.
6/23/2025
Yay! Glad to hear that, Angel -- thanks for sharing the photo :) Where you headed now that you're hitched and wired up?
Phenomenally simple and easy to install on my 2024 Hyundai Tucson SEL. The entire installation took exactly 6 minutes and 32 seconds. Yes, I timed it. The kit comes with everything you need for a quick installation. The unit worked perfectly when tested on my trailer. I’ve always trusted Curt items and this is no exception.
James 
6/1/2025
Still going strong after a year. This is a far better application than factory installed parts. I’ve had both and will continue to use Curt instead of ordering factory parts. Incidentally, the part and wiring harness and 14 the price of the factory set and twice the quality.
Kate F.
6/2/2025
Your company is great.... However, UPS delivered the packaged looking like this. Good thing nothing was missing or damaged See PICS
Brooke M.
2/17/2025
Oh my good grief...! Gotta meet that staple quota for the month, I guess...I am glad to know everything made it ok, though :)
This was a plug and play installation, very straight forward and easy. etrailer does a good job matching you up with what fits your vehicle. This is my second time buying from them and both experiences were very good, highly recommend.
Gwendolyn Y.
4/25/2025
Plug and play then off to adventure! What are you going to be towing, James?
This plug and play harness is So Easy to install
Love it and well worth the money spent.
Thanks to Joanne K at etrailer who helped me with my purchase over the phone. I also purchased the connector and a Curt no show hitch from her.
All were great.
Hitch was a good fit and easy installation. Wiring kit the same. All working well on my 2024 Hyundai Santa Cruz SEL 2WD.
Brooke M.
4/3/2025
That's great, Robert! So why the new harness? Do you have a new trailer to tow?
Purchased curt hitch for my 2024 Tucson along with the curt wiring harness. Easy to install. No issues with fit. Wiring harness plugged right in and works fine. Excellent products.
Good product. All of the parts were there and mounted perfectly. I am now able to use my trailer with all lights working.
Connected to factory-installed harness with no issues. Contained more than enough zip ties to mount without any slack/wiggle.
Steven
3/16/2025
Still working great and holding up to regular use a year later
Andrew N.
3/16/2025
good instructions and easy to install
David
5/31/2025
No complaints! Performing as hoped. Would buy this again!
Easy to install. The installation videos on the etrailer website are very well done and very informative.
Happy C.
2/13/2025
The wiring harness was easy to install and has only been used on a limited basis but worked well!
Robin H.
2/13/2025
Item was advertised as fitting a 2025 Kia Carnival, however this is not the case as verified by my mechanic. Documentation from Kia verifies that 2025 Carnivals produced after August 2024 use a 7 pin wiring harness, rather than a 4 pin. Having to return this item and order a part from Kia that costs 10x as much. Customer service also was dismissive on the phone and unable to offer a different solution.
Does the job of supplying 4-pin trailer wiring on our 2022 Hyundai Santa Fe Hybrid.
However, it does not pass any information back to the car to tell it a trailer is installed, which means you have to disable the rear parking sensor EVERY TIME you shift into reverse.
I'm not certain if the factory Hyundai trailer wiring harness would solve this, but it may be worth looking into if you plan to keep a bike rack installed full time or tow frequently.
Heather A.
10/9/2024
Matt, that sounds super annoying and I know that would drive me crazy. I contacted Curt to see if the wiring harness is supposed to stop that reverse sensor from activating. I am leaning towards that the trailer would need to be plugged into the wiring for that to happen. Since you are just carrying a bike rack, the wiring is not being used. Correct? I read on a forum that there is a way to permanently disable that feature on your Santa Fe. I know that is not ideal so let me find out what Curt has to say first and go from there.
Installation was as easy as it gets. Plug and play for my 2022 Hyundai Palisade. Cable lengths were perfect. I added split loom plastic wrap then spiral wrapped the bundle. This makes the install look factory and adds a little protection to the wires.
Product works well. ~11 months in and doing great. Install was trivial while I was removing the rear bumper anyway as part of installing the Ecohitch.
Timely shipping and hitch and harness worked as described and designed.
Brooke M.
3/20/2025
So happy to here everything made it to you, and your experience wasn't short-circuited by any mishaps :)
the product was an exact match to the Hyundai 2023 Tuscon hybrid trailer connection. easy to install and works great
Happy so far. Installation was simple. Purchase process was easy, and shipping was super fast.
Took 10 minutes to install. Very high quality. Plug and play
Hitch fit like a glove. Processing and delivery was prompt. Would recommend etrailer and will do business with them again.
Fit perfect to the factor harness and enough slack to dress the 4 plug nice with the hitch
Shipping was fast. Arrived 2 days after I ordered. I watched how-to video on Website prior to ordering and took less than 5 mins to install wiring kit. Very pleased with this purchase
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Johnny
6/4/2025
Hitch is working as designed. No problems at all.