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Wiring a trailer doesn’t have to mean splicing or routing power all the way to the battery. This CURT T-Connector plugs directly into the ports behind the tail lights and is ready to go once connected. There’s no separate power lead to run, making it a clean, straightforward installation that just works.
The integrated converter keeps the trailer lights working right by combining the stop, turn, and tail light signals from the vehicle into a 4-pole output. It protects the factory wiring from overloads and keeps everything operating within the proper 5-amp capacity for the running light circuit. That means solid brake and turn signals every time you hook up.
Whether your setup uses modern LED lamps or standard incandescent bulbs, this harness handles both without issue. It’s designed to read signal inputs correctly and deliver proper voltage to any trailer lighting style, keeping everything bright and in sync.
The 4-flat connector gives you standard running light, brake, and turn signal functions and can easily be adapted for 5-way, 6-way, or 7-way systems if you add accessories later. It’s a simple foundation that supports whatever trailer wiring setup you need down the road.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
I installed the wiring harness and trailer hitch on my 2000 Toyota Tacoma without any problems and I have used it without any problems. I always check to make sure my trailer lights are working prior to moving my vehicle and I have not had any problems. I am very pleased.
It's a great product, and was easy to install took about 30 minutes
It was an easy plug in hookup to my 03 Tacoma. Only issue I had was I had to convert my trailer lights to L.E.D. from standard lights to make everything work properly. According to the technical advisor at etrailer, the converter from a 5 wire truck harness to the 4 wire used too much power to operate the standard lights.
Well... The electronic controller on the unit I received was bad, giving intermittent connections for the brakes, blinkers and hazard blinkers. I should have called etrailer immediately, described the symptoms and they would have sent me a replacement immediately. Instead, I spent most of a week trying to track down where the bad connection might be.
Now that I have a properly functioning unit, it is wonderful and easy to install. No trying to figure out which wires to tap into.
I do have a suggestion that you test the unit before fully installing it. This is very quick and easy. You have to take the tail lights off or otherwise get access to the taillight plugs to install this unit. Before proceeding further, plug this unit into the wires coming to the taillights and plug the other end into the trailer. If it works, you have a good unit. Unplug the unit and proceed to install it underneath the vehicle. If it doesn't work, call etrailer, describe the symptoms and they will send a replacement.
Installed in no time. Quick shipping, fit the stock Toyota connector perfectly. All wires are plenty long. Would recommed.
Had a customer bring in his vehicle and wanted us to splice into his wiring and install his own after market towing lights..needless to say we declined because of the liability and cutting into a wiring harness is never a great idea. So I ordered this towing harness for the customer and it arrived at the shop within 2 days. The customer was impressed with the way it connected into his vehicles wiring without any cutting of wires. The customer was Amazed on how simple it was and was very happy on the install and of course how it worked..., another happy customer is always good and using this type of wiring kit is better and safer when dealing with a vehicles wiring.
Excellent product so far . Will see how log it lasts. I'll be back!
James
7/3/2025
The Curt wiring harness is still working great after one year of use! I have been completely satisfied with it.
The Curt T-Connector vehicle wiring harness arrived just a few days after placing my order. Everything I needed was included in the package. Installation was so easy even with removing my very old failed harness, installing the new one only took about 30 minutes. Connections were simple and no splicing! I would recommend etrailer to anyone.
Bud G.
10/31/2015
After a year of use it still works perfectly.
Great produce. As you had told me about some vehicles, that some need help to work in using a wiring harness in lack of power from that vehicle. My 2002 Toyota Tacoma is one that needed help. When I called you back with my find,
you rushed a fix ( freely) to my need quickly for my truck that saved me from missing my hunting trip that I was leaving in less then a week. Great produce from a great company with great employees that care for each need of the public.
When [etrailer] was formed, obviously it was formed right from the top down, thinking about the person, the public.
GOD BLESS
Steve S.
10/17/2020
Still Great
This product is terrific. I found some weird wiring that someone did on the left rear light of my truck in the past. Apparently they were trying to get the trailer lights to work by adding direct battery wiring. I wasn't sure what to do so I decided to start by just removing all that extra stuff and installing this kit as per directions. I did that and boom!.... The the tailer lights worked perfectly first time out! I was very surprised... I was sure there would be problems. But there were not! It was just too easy!
Richard
5/31/2019
I Have never had to give my trailer lighting a second thought... Every time I check the lights they always work as they should
Took about an hour to install. Make sure to test with the vehicle engine running so processor is getting full power. Highly recommended unit for a first Gen Toyota Tacoma.
Great product, plug and play was super helpful
The harness was extremely easy to install. The inline plug and socket to the existing lights makes it so much more reliable and secure. The only wire to connect was the ground to the frame. I would highly recommend this product to anyone needing a trailer outlet added to their 90's Tacoma.
I installed the receiver hitch today, alone. Not bad for an eighty year old!
The installation process wasn't bad after watching a video. I'm very impressed with the quality of the product. It is very robust!
Easy install (took maybe 30-45minutes) and works exactly as it should. The wires were all the perfect length with maybe 6” excess per line. Only time I had to pick up a tool other than a screwdriver was for unhooking the battery terminal and drilling the ground wire into place.
Easy to install and works great. Thanks for making the process easy!
Michael
3/20/2026
Works great!
Fast shipment!! Received hitch in a few days. instructions where right on and easy to use. Plus, online there was a video from etrailer on how to install the hitch. Hitch and wiring only took 2 hrs to install. Great product, great service will definitely order from them again! Thank you etrailer!
Great kit, super easy install. I went and wrapped all the wiring with a nice cloth tape and hid it with the existing wiring from the manufacturer. Super clean install.
This vehicle wiring harness is the way to go, just a couple connectors snapped in place at each tail light and route the wires under vehicle, then place 4 pole wire connector in a holding bracket and that's it, your ready to go, diy job takes about 30 minutes at the most, buy this product, you won't regret it.
Product was an exact fit for my 2000 Toyota Tacoma. Super easy install. I saved the black plastic flexible wire tubing from my old wiring harness which I think adds a lot of protection. I would recommend buying this type of tubing to use. Also purchased the 4 pole flat bracket to fit the connector which makes for a nice professional finish. It easily screwed into the bottom of the bumper-----just had to drill two 3/32 inch holes. See picture
Overall very satisfied.
Very fast shipping
Wow, way too easy. Ispent more time cleaning the taillight housings than installing this harness.
Gwendolyn Y.
2/12/2026
I'm all about spending less time on a project. More time for all the fun stuff.
well-packed, complete harness kit; good instructions; straightforward installation
Perfect fit harness plugs into existing wiring with no problems. I had to put the rubber plug cover in the sun to soften it enough to fit. Those of us with trucks can't hide the converter box in a trunk to keep it protected from rain like the instructions prefer. Oh well.
Mike L.
3/12/2026
Hey Leonard, as long as it's not located in a place where it'll get submerged the converter box will handle rain just fine.
Good for the price. Customer service and shipping were excellent. Everything seems to be of decent quality, all of the parts and pieces needed are included, but the gauge of the wires leaves a little to be desired. All and all, well worth the price.
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Brad
6/22/2017
Still going strong, pull my trailer once a week and the lights are still working properly,