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Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Includes tail light converter.
Features:
Specs:
Installation
This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness.
Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.
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.
Tail Light Converter
A tail light converter is built into this T-One connector. 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 your trailer. The tail light 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.
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Average Customer Rating: 4.9 out of 5 stars (357 Customer Reviews)
Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Includes tail light converter.I was pretty surprised by just how easy this was to install. Probably 20 min, once you have a screwdriver and a drill in hand. Works great! 621784
Fits the 1984 truck too! Prompt delive ry. 570784
Perfect fit and super easy install. My local trailer place wanted $130 to install it. I can tell you that it only takes a few minutes and works great. 554954
Great product...installation was fast and easy! 550912
Above excellent. I had previously bought a standard cut and wire in cheap unit and took an hour to cut and slice this in realizing that this did not include a brake wire adaption. I was going to figure it out and make it work. I saw this unit while looking for parts and thought I would try it and see if all worked. Someone would be crazy not to buy this unit. It is very very fast to hook up, accurate quality connectors and wire and EVERYTHING works just like the pickups tail lights and you don't need an Auto Technology degree to make all work instantly. The price is ridiculously low and having used this unit once I would instantly pay double next time. Also the big plus is you keep total integrity of your trucks wiring. We live in salty road winter conditions and it is not good to splice chassis wiring if you don't have to. This is a terrific product. 83224
Andy - 06/04/2014I purchased the T-one Wiring Harness for my 1998 Toyota Pick--up. The harness is a plug and play installation with no wire spicing required. The harness does work well once installed correctly. My only complaint is that the instructions with the unit does not clearly state which side of the harness connects to the left tail light and which side connects to the right side. This should be CLEARLY stated in the instructions and it is not even mentioned. As a result, I installed the harness to the opposite tail lights and had to re-wire it after I tested it. This doubled the installation time from 45 minutes to about 90 minutes. This could be easily fixed by just labeling the side of the harness that connects to the appropriate light. This simple fix will turn a good harness into an excellent harness. 517352
Replaced my current wiring harness which was spliced into my vehicles wiring harness. Very simple and easy to install. Only got 2 scrapes on my head from hitting the tail gate. Better than average scrapes, and 200 % better wiring harness. Etrailer has it figured out. Thanks again. 667150
This was very simple to install just as the instructional video guided me through. Very helpful. 543217
Thank You etrailer for the technical support from both Bill and Jameson. After Jameson's email and discussing with Bill in Tech Support, I verified that I had a good ground. Next, I checked the input voltage to converter with digital voltmeter and it was varying with turn signal between 3-9 VDC. So to be sure, I built myself a 12 VDC tester from old trailer light. With the tester on input terminals to the converter, I could see the turn signal light blinking, stop, park, and brake lights functioning correctly. Using the tester, I verified there was no brake or turn signal exiting the converter. I ordered the converter and received in 5 days. I installed yesterday. The instructions were clear and accurate. I removed the old harness and interlaced the new one along the same path with tie wraps and black electrical tape. I found a flat surface inside taillight housing and used the self adhesive tape on converter to mount converter. I put the tail lights back together and tested output at 4 wire trailer connector and everything is working correctly. I'm very pleased with etrailer and would recommend their technical support and overall operations to anyone having trailer light or other trailer problems. You are a great team at etrailer. Thanks 566403
This wiring harness is easy and works. My 99' Tacoma doesn't have a connection for a trailer. I have put off having someone wire it for years. Mainly because of the expense and having to make time to take it somewhere. It was going to cost over $100.00 to have it done. Then I stumbled across etrailer.com while trying to see if there was some way to wire my truck myself. It took me fifteen minutes to hook this harness up. The reason it even took that long was because I was a little picky about how and where I wanted the plug to hang. Why can't everything be this simple? 21880
Installation was easy. The harness itself is a bit more complicated because of the inverter required because of the separate taillight circuits on the Tacoma pickup. I can't remember exactly the time frame but after 2 or 3 months the inverter in the harness failed. I called and there was no warranty, so I had to purchase another. 486083
So easy to install 852324
The pigtail is pretty stout as far as construction but after 6 months the plug had a short and I had to rewire it. 851072
Easy set up! Definitely recommend this product!! 848622
I bought the Tekonsha wiring kit for my trailer over a year ago and it’s still going great. No issues and easy to use with the mounting plate for the connector. I give etrailer high marks for their great products and impeccable service. Rock over London, rock on chicago. etrailer. This ones for you. 830513
Easy installation on the hutch and trailer wiring kit... I’m extremely pleased with my purchase . Great product, company and service! Quick shipping and excellent customer service.... I highly recommend etrailer !! 819790
Good product, easy install. For someone that needs detailed instructions, the ones provided are very minimal. However, like I mentioned above, overall very easy installation. 809721
Product was everything described. Super easy installation! Only small complaint (and it's really just a personal preference thing) is that the length of wires from the 4 pin connector back to the truck are REALLY long. They can easily be shortened but I did not want to cut and splice on a brand new product for my truck. Other than that small nuisance this product does everything as described and the fit and finish is fantastic!! 808256
No issues at all; directions are clear, comprehensive, and concise (and there are videos available for those who prefer that), the parts are high quality and functioned correctly. Shipment was quick. The entire installation process took about 10 minutes. If you're considering getting this wiring harness and weighing options elsewhere, rest assured that you won't do better than this. 807521
The product was exactly what I needed for my 1995 Tacoma. It was easy to install and only took about 30 minutes. It works perfect for hooking up to my utility trailer. The video by etrailer was extremely helpful in making sure my end result was quick and easy. 805684
Excellent instructional videos. It make all of this go very smoothly. Thanks again, eTrailer! 802245
Everything worked as advertised! The kit was for a 2004 Toyota Tacoma and the entire harness was plug and play. Easy to install and route. If there was any problem it was the bit of excessive length that has to be bundled, routed and secured neatly. Very happy with the product and the results. Great product and service. 799109
I rated as only good because the electrical contacts corrode over time and exposure to inclement weather. They need to be cleaned periodically if the trailer is left outdoors. It would help if the cabling was not stranded but protected by an extra insulator. Care must be taken when disconnecting and parking the trailer for storage so you don't grind the cabling between the steel tongue and say stones or gravel. Other than that connecting to existing wires was a snap. Quite pleased overall. 792202
Great wiring kit and hitch Thanks 770318
Item delivered very quickly, easy to install and exactly as described. Highly recommend using etrailer.com if you are in need of something they have. 769740
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