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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.
Features:
Specs:
Installation
This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side rear access panel. You will have to remove the floor covering, rear cargo area cover, and scuff panel to access this harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.
Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your cargo area.
It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.
A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.
Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.
Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.
Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.
Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.
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Another awesome purchase, very easy to setup I was surprised. When I read I had to run a wire from the battery I almost stopped but the video online showed how easy it was and I'm glad I did it. Such a clean install, no tape, no wires hanging out, hides in the spare tire well when not using, perfect!
Installation is not for the feint of heart, as one must be comfortable with basic automotive wiring and wiring harness connections, as well as with pulling apart brand new car interior panels. It took about two hours to open everything up, complete the connections, neatly tie up the new wiring with plenty of zip ties, and put interior back together. Unfortunately, both the written instructions and the instructional video from etrailer were missing a few details that I figured out on my own to complete the installation neatly on my 2025 Toyota RAV4 XSE PHEV.
Excellent, as per usual. Etrailer is the best place to get the exact fit for all the vehicles I have had over the years. I've had no problems with this wiring kit. Easy to install, the instructions were thorough and clear, and it's been performing well with my car and trailer a couple times a week for the last year.
Kate F.
10/8/2025
Glad we had the right fit for you H.A.V.! What are you towing with your new wiring?
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Part Number: C56434 for a 2025 Rav4 Hybrid XLE
Package crushed in packaging for hitch that was ordered at the same time. Parts loose in box that had large holes in it. All parts were present, but could have been lost or damaged.
Watching the instruction video on eTrailer website is a must. It is good and necessary to see how to access plugs behind wall panels and their locations.
No need to cut into factory wiring. Kit plugs in to existing connectors. Does need to be grounded and connected to positive (+) side of 12v battery. In a Hybrid Rav4 12v battery is it in the back, so that was easy. Not hard to connect. Hardest part was opening the trim to access everything. Best done when warm, plastic is less stiff or fragile.
I bought this for my new Toyota RAV4. Installation guide was complete and easy to understand and simple to install. Everything fit PERFECTLY! This is my 2nd time using E-tailer as I used their product on my previous Honda Element. My experience with E-trailer's products can save you a considerable amount of money on installation costs, for a minimal time and effort.
Larry
8/12/2025
Great, no problems!
Hitch and wiring kit were perfect. The box they were shipped in was terrible. The hitch had busted throuhh the cardboard and there were several places where paint was knocked off. I'd suggest shipping these hitches in sturdier packaging.
I have bought 2 Curt trailer hitches and the custom wiring harness from Etrailer in the past 3 or 4 years. These are my only experience with installing hitches. At first it looks as though this requires a lot of experience.The hard part is figuring out how the auto manufacturer put the auto together. It's a bit of a struggle, but Curt did a perfect job on their end.Youtube is a big help also. E-Trailer also does a good job sending the correct parts. I will definitely use them again and again for the parts that I need.I don't have a photo, but I am very happy with the looks of the installation. On the bolts that connect the hitch... tighten those as close as possible to what the instructions say. Mine were 86ft/lb. Thats more than the lug nuts on the wheels.
Easy to install took about 30 min. You will need hitch 1 1/4 to fit. I had to buy an adapter because I wanted both size ball hitches.
My mechanic had not problem installing. Since I have a SUV the wiring is kept in the back and not in the elements so I wouldn't know how it holds up exposed, but it works well hooks up to trailer wiring tightly.
Installed this on a 2023 Rav4 Prime. Install was very simple, took me about an hour as I had to disassemble the interior in the cargo area to get to the plugs. I had to add 4 inches to the ground wire so that it would reach an already existing bolt from where I mounted the controller in an already existing hole. Works very well and had plenty of wire to reach both sides
While this is relatively complicated to install, the challenge was more due to Toyota. I installed wiring for a 2016 Subaru Forester 2 years ago that was relatively simple, one plug provided and in place by Subaru, a ground and mount the little black box all on just one side. With Toyota, you need to unplug and replug each side (4 connections instead of one, and 4 unconnects) versus a single plug in. You need to remove both side panels and the rear threshold. All that said, the instructional video from etrailer made it a lot easier. I guess it wasn’t as difficult as much as it was tedious with a lot of steps. For five stars they may have considered the cap connectors, which to me are much easier to use for a DIYer. The butt connectors didn’t work for me.
Gwendolyn Y.
5/12/2025
Thanks for sharing your install experience with us, Tom. I can completely understand not enjoying the install process on your 2024 RAV4 when the last time you installed a harness it was one and done. However, now that it's installed, what are you planning on towing?
Been using this wiring harness with a boat and small utility trailer for a year+ now and have had no issues at all. It was easy to install and has been working fine.
Included instructions were easy to follow. In addition I watched a video from Etrailer of the installation.
Greg F.
7/30/2025
One year later, and everything is still working perfectly.
Easy install on a 2024 RAV4 Prime. Battery in the Prime and hybrids is in the on right side so no running the power wire to the engine!
The harness fit and works great in my 2022 Rav 4. It took me and my dad about 3 hours total to install. The hardest part is running the hot wire all the way up front to the battery. I would definitely recommend the harness to anyone needing it.
This was a perfect fit for my 2021 RAV4 Prime XSE with Premium package that has the kick open hatch. You will have to take the exhaust pipes and muffler off the three rubber hangers. Don't forget to support the muffler so it doesn't hang to low and break something. The bolt on the rear passenger side is a bear. Have someone there to wiggle the hitch around or lining the bolt up to the hole is murder. I would use one of the bolts you removed from the tie down bracket for this hole because those bolts are shorter. That one bolt took 30 minutes to start threading.
The kick plate still works after installation...big plus!
Keith
3/14/2025
Still great! I use the hitch several times a week and its still going strong!
Good price, works as described. Used for two trips a year apart. I changed my battery and accidentally ripped the fuse off the old one, but was able to fix it with a few dollar piece from the auto store.
The kit came complete with everything needed to install, but installation was quite involved with dissembling the rear plastic interior panels and running the power lead from the battery under the body to the rear of the Toyota RAV 4.
I highly recommend doing business with eTrailer. Great products and wonderful service. They also share how-to videos which made the installation very easy.
Brian
5/31/2025
The product is excellent. Works perfectly and fits just like factory. I recommend it completely.
Kate F.
6/2/2025
The trailer connector works great. No issues with installation or usage. Highly recommend this product to others.
Atomicdog
5/28/2025
The trailer connector setup is still working as it should. No issues to-date.
Hitch and harness came in timely manner and hitch was not damaged from shipping
Order was correct. No problems
Works great, did a 2000 mile road trip this summer and no issues with trailer lights. It took a little bit of time to run the wires for the install but it has worked flawlessly since installed. Only recommendation I’d make is it would be awesome if it’s possible to make the harness plug and play for the RAV4 but that may be impossible with the available rav4 factory wiring?
Victoria H.
2/20/2025
Hi Joseph, this is considered a plug and play. Some vehicles can't handle the additional amperage draw of trailer lights, so the wiring harness requires a power wire to the battery. The black wire with the converter is required in order to protect your vehicle wiring. But that sound like quite the road trip! What was your favorite part?
The dealer wanted over $1K and estimated four hours installation time. The excellent video on E Trailer made this a straight forward one hour install and saved me over $900. Thanks!
The installation was a bit more involved than the eTrailer video suggests - on the 2024 RAV4 Prime, you have to remove the plastic molding that holds the jack tools and the jack in order to bend the side molding far enough away from the vehicle so that you gain enough room to install the wiring. But the harness itself is quite elegant, so kudos on this piece!
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Mike
4/17/2025
Love it, well in fact I never have to think about it but I use it every week to take the trailer to the dump for grass clippings. The wiring kit has never had an issue, all lights work, still just as happy!