T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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1995 Lexus SC 300
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1995 Lexus SC 300
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Tired of trying to figure out complicated wiring for your trailer? The custom-fit T-One connector is designed specifically for vehicles like the Toyota RAV4, allowing you to easily and quickly install a 4-way trailer connector. It plugs directly into the existing wiring harness without the need for cutting or splicing wires, making it a breeze to set up and saving you valuable time.
Concerned about straining your vehicle's electrical system while towing? The ModuLite powered converter included with this wiring harness efficiently distributes power and combines the brake and turn signal functions to ensure your trailer lights operate smoothly. It draws power directly from your battery, eliminating the risk of overloading your vehicle’s circuits, and maintaining optimal functionality even during long trips.
Worried about wire damage or corrosion from the elements? This wiring harness is constructed using 16-gauge bonded wire for added durability and is equipped with a dust cap that keeps the 4-way flat connector clean and protected when not in use. These features ensure long-lasting performance and reliability, even in challenging weather conditions.
Have different trailers with varying connector types? This harness not only provides a 4-way flat trailer connector but is also compatible with 5-pole, 6-pole, and 7-pole adapters, making it versatile for all your towing needs. Whether you're towing a small utility trailer or something more complex, you’ll have the right connection to keep yourself and your cargo safe on the road.
Experience frequent issues with blown fuses on your trailer wiring harness? The T-One harness is equipped with built-in circuit protection which helps prevent electrical faults and blown fuses. By isolating the vehicle's wiring from potential trailer issues, it ensures long-term reliability and saves you the headache of unexpected halts during your journey.
Want peace of mind with your purchase? The T-One Vehicle Wiring Harness comes with a 1-year limited warranty, ensuring that you can tow with confidence. Should any issues arise, the warranty provides reassurance that you're covered, ensuring continued performance and durability of your trailer's electrical system.
This will not affect how the tail lights on your vehicle operate.
California residents: click here
Harness fits perfect into our 2016 Rav 4. Video instructions were spot on. I only added (not necessary) a wire insulating cover when running it outside and under vehicle. Also, I had bought the special trim removal tools years ago, highly recommend....just buy a set, you'll use them throughout your life. Thank you.
I've purchased a number of products from etrailer one the years. Always vey satisfied. Your installation videos are superb. This time was for installation on our 2018 Rav4 Hybrid. I'm embarrassed t say I'd bought one for half the price on eBay, but while it said it was for our make/model, it really was only for the non-hybrid version. The rear trim in the two versions is slightly different and, as a result, this cheapie didn't fit. I could have cut and spliced wires, but by that time I'd learned my lesson, consulted with you, and bought yours. I'd like to say installation was a snap, but it was very difficult. Not your problem, Toyotas', But at least, after going through all that, I had the confidence of having bought a name-brand product from a reputable source. Won't make that mistake again.
Wiring harness for trailer hitch worked like a charm. No issues.
I think that the product overall is good. But, I don't think putting this Assy. together is for novices. The video was helpful but, I improved on the safety and more professional installation. One thing I have a problem with is running the hot wire over the sub frame of the car. This is how the video shows the installation. The first time you go to your tire dealer for tires he probably will place his lift support guess where? On top of the hot wire you ran over the sub frame. Guess what happens then - Electrical short! I drilled an additional hole (in the sub frame) and then ran the wire through a piece of rubber hose for protection. Also, an electrical plug mount is welded on the hitch. Why not use it rather than slamming your trunk on the plug wire? Such an armature set up.
John D.
7/24/2019
It is working out fine. I only use my Rav 4 for pulling small light trailer. I think that my pictures show a quality professional job. I was a machinist for many years and can make custom parts that I needed.
Very great kit , easy to install . I did like another customer and run the wire through the cabin instead of under the carriage, it's more work but the wire will probably last longer that way .
Outstanding! Worked perfectly. However, the video didn't describe the 2018 RAV4 Hybrid install. Connecting the tail-lights was the same, but the module/battery install was different. I read several of the Q&A's about hybrids, but couldn't find any of the references to the supporting videos. I mounted the white neutral wire to the battery frame ground rather than using the "zip" screw. I didn't have to use any of the black power wire extension. The fuse wire was long enough to easily reach the battery positive terminal. Also, I used heat-shrink tubing rather than electrical tape to cover the splices. Thanks for providing a quality product.
William K.
5/24/2022
Great! No problems at all!
The trailer is exactly what I needed. The trailer did have paint delamination happen on the top rails and 1 vertical rail. This trailer was on the lot for 1 season, I understand, and this would be the 2nd winter stored outside. Delamination of the paint was scraped and sprayed. No rust was found. Other than that, there has been no issues. I moved the trailer jack forward to mount a trailer box from Harbor Freight. Great addition. Simple to install with a few screens and rubber feet to eliminate vibration.
The wiring harness/connector seems very well made and the install instructions were clear. However, I have not yet installed it because I'm looking for a way to run the power wire through the interior of the vehicle, rather than outside along the frame, without having to gut the interior. I live in Wisconsin and didn't want the wire exposed to the ice, snow, and salt that we experience in the winter. Have any of your techs had any experience with routing the power wire through the interior that isn't to invasive? I haven't devoted a great deal of time with this issue because I bought the hitch primarily to use with a bicycle rack. If there is any info regarding this, would you please pass it along?
Victoria H.
1/8/2025
Hi Kevin, I can help with that! I have a great article that describes how to route a power wire through the vehicle. This will require a special tool from a Toyota dealer for your Rav4. If you are personally not comfortable removing the interior paneling, I do recommend reaching out to a local installer for assistance with this. I will attach a link to our local installer locater below. Once you input your zip code, the installer locator will generate a list of local installers near you. Let me know if this helps get you going in the right direction.
The hitch was very easy to install and video instructions were perfect. The wire harness wires were not as long as in the video, but overall install was as in the instruction. FYI , the Hybrid battery is in the rear, so a bonus with not having to run the power cable & fuse to the front of the vehicle to attach to the battery.
Toyoda Rav4
4/8/2020
Year later and everything is working perfectly with no issues.
The wire kit I purchased was exactly what I needed. It was/is a perfect fit. I had no problems or issues with it. I WILL definitely reorder from here in a heart beat.
Installation was well described in the directions. This was pretty much plug and play. Getting power from the battery was the biggest challenge. I was able to run wire through the firewall by using an unused grommet. Made for a neat installation.
Was Exactly what I looking for. Installation was easy with video.
Hi Carol, I emailed my feed back. Out here in the sticks your website couldnt load properly. It a great product. Perfect for this light duty purpose.
It was a very easy install. I used part of the instigation video provided by e-trailer. Specifically the panel removal and tail light connector access portions of the video. I did, however, route the wires slightly differently; personal preference. Instead of routing the black power wire beneath the vehicle, I removed enough interior paneling, and the threshold paneling in the door ways in order to route the power along the drivers side wire bundle. Additionally I used 1/4 “ loom to protect the entire run of wire. The 2017 RAV4 routes the hood release cable and a wire harness through the fire wall bulkhead into the engine box. There is an auxiliary knock-out in the fire wall grommet perfectly suited for trailer wiring. I use a blunted 1/16” wire fish tape to pierce the rubber grommet knock out, and I fished a nylon line from the cabin and into the engine box. I attacked the nylon line to the power wire with electrical tape. I soaped the wire and pulled the wire easily through into the engine compartment. I routed the wire to place the trailer fuse near the vehicle fuse box. Except for the interior routing, and using preferred wire connectors an loom, I followed the e-trailer installation procedures.
If I were to make any recommendations for this light vehicle kit, I would want 6 additional inches of wire harness between left and right tail light connectors. It would be easier to totally obscure wire harness within the paneling, and allow one to place the power module behind a panel. My only fear is that an exposed module on the wall of the spare tire cavity could get knocked around.
The entire product works like a charm. I think they did a fabulous job making this a plug and play product. Thanks guys and gals.
This was my second installation of an e-trailer wiring harness. Instructions and videos make this installation a snap!
So far so good, very compact enclosure. As usual a lot of trim panels to remove to install but that's always the case.
The 76134 receiver is well made. All weld beads are continuous and consistent and the material is sized right for adequate strength and minimum weight. Mounting bolt hole pattern is right on. Paint is good and consistent with no dings or scratches. Installation was straight forward. It was necessary to procure a M12 X 1.25 tap to run through the mounting weld nuts in the frame in order to get the bolts to thread in; not a fault of the receiver but the effects of four years of over the road use of the 2015 RAV4. Also the small amount of extra money for this hidden crossbar version of a receiver was worth it when looking at the final installation.
The 118578 T-One harness kit installation was also straight forward and it works as it should. Installation was made a little less difficult with the use of the ALL648544 trim pad remover that was purchased with this order.
Outstanding hitch, wiring harness & attachments. Online help (when given the trailer manufacturer and year) chose correct size and offset for ball to perfectly align trailer and car. You can see the lawn tractor sitting absolutely level on the trailer with the snow flying. It shows why I was in such a rush to acquire the hitch. From online chat with sales agent to her selection of right fit for the particular trailer and car to the ease of installation and the perfect ride behind my RAV4...RATING: A+! Couldn't be happier. Expedited 2 day shipping arrived exactly as promised. So impressed!!! Thank you etrailer for outstanding service. Very happy customer!
Junk. The box never worked and we had to bypass the box and wire it in direct. Now no brake lights.
Excellent component quality.
Installation photos did not properly show the location of the light connectors for a 2017 Rav4 Hybrid. Otherwise, very happy and would buy again.
The product and support that etrailer provided was far and above what I had expected. The video on the website that helped me choose the best hitch for my car was informative and vital in picking the right one. Then the product was a great price and of great quality and delivered promptly. And most importantly, the installation video that helped me install my new hitch was very detailed and was absolutely the best part of the whole experience. Everything together made it a five star experience all the way through. Especially since I saved over $500 by doing it myself. I since have referred your company several times to family and friends who were equally impressed with their experiences. Please tell everyone involved Great Job and Thank You! I plan on buying another one soon for my son’s new Toyota Rav 4.
I installed wire harness myself, Utube video made it a lot easier to do. Everything worked perfectly.
Stan
2/5/2025
No problems with product at all. Want to save some money? Buy it from Etrailer, follow the video and install yourself.
My products:
118578 wiring harness for 2014 RAV4
C13149 trailer hitch for 2014 RAV4
The hitch was a breeze to install. I didn't even need to drop the exhaust. I used a bottle jack to support one side just high enough so I could get one bolt started, moved to the other side and inserted the 2 bolts and the rest is history.
The wiring harness is another story due to the requirement to disassemble the rear interior trim panels. I assumed the first connector I found was it. It did not match the connector on the harness. I called for help and spoke with Cathy T. and she got me on the right track. The connectors are located about chest high, the ones I mistakenly chose are mounted near the floor. All went well other than getting my forearms a bit bloodied by the sharp edges of the plastic trim panels.
etrailet.com saved me approximately $615.00, the dealer wanted $835.00 to install a hitch and wiring harness.
Excellent product, not that difficult to install. Video helps a lot with installation
Plug in play. The only challenge was the power wire that needs to go to battery.
I ran the wire inside so the installation took longer since I had to remove several trim panels to run the wire under. I used the hood latch cable to fish the wire thru the firewall - like a found in another post.
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Pat
7/15/2024
Been a year and still super happy w it!