To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
Installing a trailer connector can be daunting, especially when you're faced with a complex wiring job. With the Curt T-Connector Vehicle Wiring Harness, cutting, splicing, or tapping into your vehicle's wires is a thing of the past. Simply plug into the OEM tow package port located behind your rear bumper, and you're ready to hit the road with a reliable 4-way flat trailer connector.
Struggling to find a wiring harness that fits perfectly with your factory setup? This Curt T-Connector is custom designed to integrate seamlessly with vehicles equipped with a factory tow package. It's made to ensure a precise fit, bringing peace of mind knowing that it aligns perfectly with your factory-installed systems without any hassle.
Whether you're hauling a small utility trailer or a larger camper, versatility is key. This harness isn't just limited to 4-way connectors; it works with 5-pole, 6-pole, and 7-pole adapters, covering a wide array of towing needs. Just plug what you need for your specific trailer and unleash the full towing potential of your vehicle.
Weather elements can wreak havoc on electrical connections, but not with this harness. It comes equipped with a dust cap that protects your 4-way flat connector, combined with a recommendation to use a little grease on connections to ward off corrosion. This ensures long-lasting, optimal performance regardless of how rough the roads or weather get.
Say goodbye to tangled wires and unsightly installations. Once you've plugged in, the connector can be securely stowed beneath your vehicle, near the trailer hitch. The use of an optional mounting bracket ensures a tidy, damage-free setup. This thoughtful design keeps your wiring protected, accessible, and discreetly in place whenever you need it.
California residents: click here
Plugged in & worked great...
Easy to install
Installed with no problems, thanks for the quick delivery, complete instructions and good looking product.
I selected this wiring harness for my Lexus RX350 and it works great and it was super simple to install. If you’re looking for an installation project you’re going to look somewhere else, this took about 2 minutes to install and one of those was getting the packaging off. This fit into the wiring of my Lexus with no alterations, just plugged it in and routed the wire to the hitch.
Simple install, works great, I use it every few weeks to pull a small trailer. I’d buy it again
Easy to plug and play if you have the towing package on your car. Loved that it came with zip ties and a plug cover.
Perfect fit into the vehicle's existing wiring harness. Has about 4' of cord so it will ensure you have plenty of wiring for wherever you want to route it under the car.
Very easy to install after watching your video. Just plug and play!
Trailer wire harness was the exact fit. Well worth it. Videos were very helpful for both the wiring harness and the hitch. Thanks etrailer!
Package arrived before the ink was dry on the credit card billing…??
Product was complete and undamaged…
Waiting for the shop to have a date to install it…
Connected perfectly to the factory connector that is already installed IF you have the tow package on a 2021 RX350
A well made product. Some variables w/ the install as my Vehicle had a trim package that altered the advertised overall installation process. Overall very satisfied. Four hours to install on a 10 year old vehicle by a 69 year old male.
Thanks, Kirk
Shipped to my door in less than 24 hours. 2010 RX350 wiring harness worked flawlessly. Plug and play. Very happy!
Worked perfectly. Vastly better than a generic kit with quick splice connectors. Perfect fit to factory harness.
Shipping was prompt and extremely well packaged. I received timely updates on the progress of my order (which was much appreciated as I needed this an upcoming trip). Both the recommended hitch and wiring harness were a perfect fit. The installation video and PDF were informative and accurate, making the installation stress free and within the estimated timeframe. One hint: if working alone, a floor jack to support the hitch works as well as another set of hands.
This was my second order from E-trailer. Their products and support are excellent.
Great website, Good prices, really fast shipping!
Quick shipping and delivery on a quality wiring. All that it needed was plugging it into the factory preparation. Made it very simple to install. Thanks a bunch.
E-Trailer is the only place I shop for stuff like this - great prices, fast shipping and they always know what fits and what you need.
plug and play. works great
Worked perfectly with my 2019 Lexus RX3 50.
Literally cannot get simpler to install than this. Luckily, my 2010 Lexus Rx450H was set up with the factory tow package (and luckily I kept the window sticker to verify that!), so once the trim panel below the bumper is removed, the electrical connection is on the driver's side frame rail, capped. Remove cap, plug in the wiring harness, zip tie to the cross bar of the hitch, you're done. Shipping was super fast--ordered on Wednesday 6-14-17, scheduled for arrival 6-19-17, arrived late morning 6-17-17. Thank you!
I'm using it to tow troop equipment and canoe trailers for my son's Boy Scout events.
Great product, excellent support. Very easy install in 25 minutes. Install directions very good. Holes are slotted in hitch, would recommend starting all bolts leaving bolts loose, then center hitch by bumping with wooden block before tightening. Then torque to spec.
As easy as all the reviews said it would be. Took a little while to get new bolts started that replaced OE self-tapping bolts. But it all lined up and gave a professional finished look when completed. Now I'm ready to help my friend install the hitch on his wife's RX. Won't hesitate to recommend etrailer.com to all in the future.
Great company and great products. Ordering was easy, shipping was fast and products were exactly as expected.
The wiring worked out great! It was an exact fit for my car. This is really a great website with plenty of technical information for making a buying decision and plenty of videos to help support the installation process. After a year of you something zero problems.

Jerry
11/10/2024
No Issues after 1 year
All I can say is, thanks etrailer for having the right product for the Job!! Product as advertised! Installation was a breeze taking only 45 minutes. I did the installation without raising the vehicle up off the ground. As a side note, the Lexus dealer wanted over $700 for doing the same job, no surprise there..
Do you have a question about this Custom Fit Vehicle Wiring?
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. Let us know if anything is missing or if you have any questions.





























Gwendolyn Y.
7/2/2025
That's some speed! Are you going to be towing a trailer soon?