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Your cart is empty.If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness -- also called a T-connector -- is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Toyota Avalon, Toyota RAV4 and Lexus ES300h (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination -- maybe it's the boat landing at your favorite fishing spot, maybe it's a campsite that overlooks one of nature's masterpieces, or maybe it's the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.
Jose M.
Reviewed in the United States on March 30, 2025
Excelente
Clémence Dionne
Reviewed in Canada on January 8, 2025
installer et fonctionne bien
Customer
Reviewed in Canada on August 3, 2024
The parts are good but poor instructions. Ended up finding good videos from u haul.
Tbauer
Reviewed in the United States on May 28, 2024
I installed myself on 2018 Toyota rav4. Watch a couple videos on how to and tackled it in one night after work. Takes a little bit to run wire up to battery but with some common sense it can easily be done. Works great glad I did it.
Customer
Reviewed in the United States on May 18, 2024
Very well thought out with most everything just plugging together. You do have to run a wire up to the battery and take several interior panels out so the install does take some time but was much easier than I thought it would be. Found a video online that was very helpful but the instructions that come with it are good as well. And most importantly it worked!
CR
Reviewed in Canada on March 16, 2024
Works perfectly on 2018 RAV4. I picked up a 12V plug for the power, and plug it into socket in back seat rather than run cable all the way to the battery. This means trailer lights only work when vehicle ignition is on, but that’s fine.
John Flanagan
Reviewed in the United States on December 15, 2024
It work great easy to install
john jesso
Reviewed in Canada on October 16, 2023
Everything fits perfect as always
Scooter Jones
Reviewed in Canada on October 24, 2022
The kit itself is great, basically plug and play. The most time consuming part was running the wire under the car. Set aside a couple of hours. Also, I strongly suggest watching installation videos on YouTube (uHaul's was better than the one made by Curt).
Double G
Reviewed in the United States on August 12, 2021
Gone are the days of simply removing the taillamp housing, plugging between the harnesses and you're done. Maybe it changed with Toyota or with recent changes to how vehicles are wired? I've had little issues before with the plug and play and not having to run a wire up to the battery for a power source or drilling a ground wire to the body - those are new ones for me. But all the other brands seem to do the same thing (they all look the exact same, but different name). So ease of install is not as 5-star as many others I have done in the past.I was impressed how well the panels are secured to the body of the Rav4 and the harnesses were a bit tighter than the videos made them out to be. The green wire was plenty long enough to reach the passenger side. Be careful with the self-tapping screw as it digs in quick and can strip the metal pretty fast if not done slow enough. The black / power wire was the pain. I routed it through a rubber grommet under the spare tire and then fed it to the front my way so that it wasn't very visible or rattle and took care it didn't get close to the axle shaft or drive shaft. My son helped fish the wire into the engine bay and again I took my time to wire and rewire to make it look indiscreet; ended up with one foot of wire left over. In all it took me a couple hours to get it done the way I wanted but if I had to do it again it would take me about 30 minutes.
Jeff H.
Reviewed in the United States on November 18, 2021
It's another custom fit trailer wiring harness with T plugs. The concept is simple and it works like it's supposed to.The installation videos/instructions I've seen of this on a Rav4 trigger my OCD. The claims of 20 mins are a byproduct of installation tactics that make compromises for the sake of time and making it seem like it's easy. To be fair, if you run the power wire under the body, it is easy. I just have a big issue with running bare wires under the car, mostly cause of issues sometimes when you work on other things.The better way to run this is along the inside of the car. The floor trim has great wire management.- remove the two drive side door sill plates- push the (+) wire through to the front of the rear side trim panel without removing it.- push it through the pillar post trim without removal- remove the side cowl by the brake- peel back the felt to expose the firewall grommet- where the small hole is, pull the grommet into the cabin for access to the closed tube behind it to cut off the end- push the wire through while jiggling. Periodically check the engine bay for cable visibility- Route in engine bay as you want.
Paul Cahill
Reviewed in the United States on August 31, 2020
I don't know what stretch or sheerness is. There is a degree of difficulty to installing this harness. It is a very good harness that connects to the vehicle wiring without any problem. It works well and everything connected without a problem. There are many YouTube videos on how to install the product. I strongly suggest you watch one of them, you'll save yourself some trouble. If you have some mechanical ability you shouldn't have a problem. Again, this is a top quality product.Just wanted to add, this harness & instructions work seamlessly with the vehicle wiring and all connections fit the factory connections. You have to run a cable to the battery to get power to your transformer (not sure if that is correct terminology) that powers your trailer lights.The degree of difficulty is pulling back some of the side panels. Don't let this scare you. E-Trailer has a very good video on how to do this. The installer even shows you the tools you need and tells you they are available on Amazon. I think I paid around $20 bucks for the trim panel tools. You may be able to get by without these tools, but for 20 bucks make your life a little easier.One tip, when running your power line to the battery there is a plastic shroud close to the front of the vehicle that you can partially remove to run the wire. Just be careful in routing so as not to get in the way of moving parts. You shouldn't be on the side where the exhaust is. Secure your wire with zip strips.I added these comments so you won't be discouraged. It's really not that hard and I learned a lot about trim removal.This was installed on a 2018 Rav4
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