To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Wiring a trailer can be tricky when you have to tap into factory wires. The Curt T-Connector #C38RV skips all that with its plug-in design. It connects directly to existing vehicle plugs, so there’s no cutting, splicing, or guesswork—just a clean connection that’s ready to go.
Modern trailers often use LED lighting, which can cause issues with sensitive vehicle systems. This harness includes a powered converter that isolates the trailer lights from the vehicle wiring, keeping signals consistent and protecting onboard electronics.
If your vehicle didn’t come with a tow package, this harness makes it simple to add one. It provides a standard 4-flat trailer connector that supplies running lights, turn signals, and brake lights—everything you need to tow small and mid-size trailers safely.
The plug and lead setup routes neatly through existing grommets or trim paths, which means fewer exposed wires and a factory-style finish. Most installs can be done with basic tools and minimal panel removal, making it an easy weekend upgrade.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody. Andy here with etrailer.com. Let's take a real quick look together at this Curt T-connector vehicle wiring harness with four pole flat trailer connector. Now this harness has been designed to fit your 2024 and newer Hyundai Kona and on custom fit parts such as this wiring harness. I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle and our fit guide will confirm if this will work for you or if we have something comparable that will work for you.
Now this will give you a four-way flat trailer connector at the back of your Kona to power your trailer signal lights. This will be compatible with five, six, and seven pull adapters. Those adapters are sold separately. As you can see, this does come with a dust cap for that four-way flat connector to keep it protected when it's not in use. And as you know, a welded trailer is a safe trailer.
This four-way wiring harness is gonna keep your trailer's brake lights, turn signals and running lights powered and in sync with your Kona. So whether you're hauling a boat to the lake or a camper to the mountains, your lights are gonna stay bright and visible. Now the these custom fit T connectors are going to snap directly into your factory's wiring harness so you can get your trailer lights up and running without any cutting or splicing. You're just gonna plug these in and you're gonna be ready to tow. Typically, the vehicle's wiring harness is often behind a trim panel or under the cargo floor.
Some vehicles may require removing interior panels or lifting carpeted sections to reach it. But once access, the harness is going to install easily with these connectors and the in the included instructions will guide you through that installation process. Now, some vehicles can't handle the extra electrical load of trailer lights, and this has a built-in power converter that's going to draw power directly from your battery. So that's going to ensure a steady, protected current to your trailer while keeping your vehicle circuits from overloading. So this kit is going to come with everything that you need to get this installed.
You're gonna get the fuse holder, you're gonna get wiring to run the wire from the module to your vehicle's battery. You're gonna get butt connectors, cable ties, a fuse, and as I mentioned instructions, everything that you're gonna need to get this installed without hunting down extra parts. However, I do wanna recommend something that is not included with this kit and that is dielectric grease, and you, dielectric grease, you should use a small amount of that on all of your electrical connections, like the plugs on the vehicle and the four pole flat connector itself. That grease is designed to help prevent electrical failures caused by corrosion and moisture. So if you don't have some and you'd like to pick some up on your screen, I am including the number for that grease. You can just take that number and pop it in the search field of our website. That will take you to the grease and you can add that to your order. Well, I think that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Couldn't ask for better communication, great service
It works. I love it. Didn’t think I would ever find the correct harness!
Great Customer Service!
Great product! Take your time installing the wires and make sure they are zip tied well and out of the way of moving parts. use dielectric grease on all connections or splices.
Holy freakin' schmickle! Best company in the world (perhaps galaxy!). Great products, communication...the whole enchilada.
Used a youtube tutorial to help had everything I needed . Added wire wrap to ensure no water gets in .
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