Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
This item does not fit your vehicle
2009 Ford Ranger
These items fit your vehicle
2009 Ford Ranger
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.
Wiring a trailer can be tricky, but this Curt T-Connector harness keeps things clean and simple. It plugs directly into the vehicle’s factory wiring, so there’s no need to cut or splice wires. The connectors match the factory plugs, giving you a solid, weatherproof fit that’s ready to go right out of the box.
With the built-in powered converter and 4-pole flat trailer connector, the Curt T-Connector #C56309 lets your trailer’s brake lights and turn signals flash in perfect sync with the vehicle lights. It provides a consistent signal for running lights, turn signals, and brake lights so your trailer lighting always matches what your vehicle is doing.
This harness is designed for vehicles that don’t have a factory tow package. Everything you need is built into the kit, so you can add trailer lighting capability without extra wiring or accessories. It’s straightforward enough for most DIYers to handle in an afternoon.
Once installed, the wiring stays tucked out of sight for a factory-style finish. The hidden plug-in design keeps things neat while protecting connectors from road debris and moisture. That means less hassle over time and a setup that looks like it came straight from the factory.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
fits perfect. Lights work. Couldn't be happier>
??
Working great after one year. Install was straight forward
This harness fit and performs perfectly.
Excellent video how to DIY, same for instructions on how to install, fast shipping, etc.
Great product, works amazing. The hardest part of the install was running the power wire to the battery. Instructions were very clear and easy to follow. Would recommend!!
Installed this on a 2023 Corolla GR. Worked perfect, easy install.
5 stars for customer service; discounted final grade because I haven't yet installed the unit but expect it to be equally superior. I asked and got rapid response to some questions about my unusual need; it was great to interact with someone with expert insight.
Has worked perfectly so far
Routing the wiring was the worst part of this kit. Other than that it has worked very well for me and I have not had any issues since install. I did some google searching to figure out the best way to mount it on my 2019 Corolla and I ended up running it through the firewall using a grommet in the driver's wheel well and back through the car under the doorsills.
D. H.
6/23/2025
I have not had any issues with the harness after a year of use. I keep dielectric grease on the end have had no issues.
Kate F.
6/24/2025
The Barnes was not difficult to install at all! Worked great, powered the lights on my trailer behind my corolla from Los angles all the way to Atlanta. Only issue is that the blinkers were opposite of what they were supposed to be. But that was an easy fix with some wire strippers and butt connectors
Worked flawlessly! 2019 Corolla hatch, installed and tested, took a minute to run power supply from battery but the connection to rear lighting was perfect. Thanks for making quality products!
Great price, fast shipping, and easy to install. Directions were clear and easy to follow.
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.
Pklch
9/4/2025
Perfectly