Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2008 Toyota Avalon
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2008 Toyota Avalon
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Wiring a trailer doesn’t have to mean cutting into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into existing vehicle wiring for a clean, no-splice setup. The plug-in connectors snap into place and are ready to go, making it simple to get trailer lights working without modifying the factory harness.
Some vehicles use separate circuits for brake and turn lights, which can make wiring tricky. This harness solves that with a built-in converter box that combines those signals so the trailer’s lights work properly with one connector. It’s the right setup when you can’t just hardwire a 4-way flat because of separate turn signals.
The 4-flat trailer connector provides the essential lighting functions—running lights, turn signals, and brake lights—through a simple, reliable plug. It’s the standard connection for most small and midsize trailers and helps ensure your trailer lights stay in sync with your vehicle on the road.
Lighting issues like dimming or blown fuses often trace back to poor grounds or corrosion. This harness includes a dedicated ground wire to reduce those problems, helping maintain strong connections between vehicle and trailer. Keeping the terminals clean and tight ensures solid power delivery every time you tow.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
The "Curt" class III hitch and t-connect wiring harness arrived promptly to my address
and I installed the same day.
Excellent service, shipped quickly.
Installation on my ´98 Jeep Cherokee XJ
was a breeze, thanks to good instructions and on-line video. Couldn’t be happier with etrailer.com!
The hitch looks good the packaging stinks. The box was destroyed when I received it you need to do a much better job in shipping your hitches
The wiring harness was plug and play. No wire cutting or splicing. More than enough length. Easy installation with the help of the detailed instructions.
The product fits perfectly. It installs well and quite easily with only a screwdriver needed to access my 1999 Jeep Cherokee's (XJ) wiring. There is ample wire length for the use of connecting to a trailer tongue. This is far superior and worth the investment over universal options that require splicing or pinching into the stock wiring. I use a home-installed Curt hidden hitch as well, with which I have been very satisfied for its function, look, fit, and ease of installation.
The standard shipping method worked well for me, living in a large metro area. The product arrived sooner than anticipated.
Great business to buy from. I ordered a trailer light wiring harness for my jeep in the evening recently, and by about 5 am the following morning it shipped. The price was great, in fact cheaper than what I saw elsewhere. I also had a question about a problem with my trailer lights that I asked them and got a detailed responsored in less than 24 hours. I will definitely be a repeat customer.
Very easy to install. Had to work out the routing of the wires from inside the vehicle to the trailer hitch. Has been working well since installation.
I have a 1999 Jeep Cherokee with separate stop lamps and turn signal lamps. I added a hitch and as I was wiring the 7 pin connector I realized that I needed a converter to combine the separate stop and turn signals into one signal for the trailer. I first bought a universal unit, but realized I’d have to hack into the wiring at the rear of the Jeep to make it work. eTrailer has a converter with the same connectors that the Jeep has which makes it plug and play. I just completed installing the converter and testing the wiring with a trailer connected it worked flawlessly. Happy camper here.
I am very pleased with the Curt trailer harness. It is simple plug and play with no splicing. I was having trouble with my old harness and Cathy explained to me that my Jeep used a separate lamp for stop and turn indicator while trailers use a common lamp for stop and turn and a converter that is factory wired in the harness was needed. After her explanation, I knew my problem was solved and when the harness arrived, it did solve the problem. I am 75 years old and have been fixing things for 60 years. Having a customer service person who actually knows her product like Cathy does has almost become a thing of the past.
Awesome possum
5 star all went with out an issue, done in ten minutes,
The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector made a huge difference in the amount of light my Jeep Cherokee headlights provided for night time driving.
Worked fine and quick install. However, would be nice to have a mounting bracket for the trailer plug to be able to have a permanent mount.
I installed one of these two years ago on my 97 Jeep Cherokee XJ and used it with a light trailer that only had brake/tail and blinkers. The installation is pretty simple as far as the init goes. Ground and connect the connectors with your vehicles factory wiring.
After I used the wiring harness for about 1 year the lights stopped working on the trailer and after doing some investigation, I learned the wiring harness had failed. A rep from E trailer said this occasionally happens if the trailer wiring has a short or other problem.
I ended up re-wiring my trailer from tongue to lights and had to buy a new wiring harness for my Jeep. Admittedly, this failure was my fault, but be sure your trailer wiring is in good shape.
Awesome product. No fuss wiring. Worked like a charm. Used to on my 1999 Jeep Cherokee to haul my home built camping trailer. I tried to do my own hack job wiring from auto parts store but it didn't work that well. Blew fuse to my turn signals. Will recommend to others.
Gordon B.
7/9/2015
Thank you for the follow-up. It still works great. I highly recommend it.
Product connected easily and worked as it should for my '99 Jeep XJ.
The trailer lights were not working consistently so I had to install a new flasher in the XJ (6 light flasher) and changed the trailer lights to LEDs. After this change I had no issues.
Myroniuk
6/13/2020
Product is still working. Needed to upgrade trailer lights to LEDs to resolve issues.
Arrived with the hitch in two days to Indiana, Dec 23rd at that.
This wiring harness was the way to go, I only had to pull off one side panel where the spare is located. I plugged it in and right below was a rubber knock out to fish the 4 connector through.
Pat
12/27/2014
The trailer wiring on my Jeep Cherokee is performing flawlessly. Great Product
Works well and easy to install. Good detailed instructions.
They have made it so easy. Plug right in and works. Took me about 30 min in total to complete the install.
Great quality and works great
Easy to install works great
Worked excellent on my 2000 XJ
The hitch and wiring harness were delivered quickly to me, in excellent condition. I am thoroughly impressed with everything, quality, additional installation tools, videos and heck, even how the hitch was packaged. Etrailer.com definitely has my future business, and I'm pleased and thrilled to recommend them to you. Have fun everyone, and as always be safe!
The instructions do not mention what to do if your XJ has a factory trailer harness installed. Mine was missing the outside plug end, so I replaced the entire harness. As a consequence, I had to cut the wires on the factory wire harness inside the vehicle leaving hot wires exposed. I taped them so as not to create a short.
Very well designed, great quality and easily plug and play, no wire splicing. Directions are clear and install took less than 30 minutes on my XJ. Would highly recommend.
Do you have a question about this Custom Fit Vehicle Wiring?
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. Let us know if anything is missing or if you have any questions.
Rachael H.
9/16/2019
There are a couple mounting bracket options. If you would like there is the 4-way bracket only and that is part # 18144, and it can be used in conjunction with the no drill bracket # 18140.
Helpful Links
Accessories-and-Parts/Tow-Ready/18144.html