To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Quickly and easily install a 4-way trailer connector on your vehicle. This T-One typically plugs directly into the back of your factory-installed 7-way connector so you can retain the 7-way and also pull a trailer that has a 4-pole flat.
Features:
Specs:
Installation
This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the rear bumper. If you have a factory-installed 7-way, blade-style connector, the T-One will plug in between the 7-way and the OEM socket.
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.
California residents: click here
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today on our 2018 Chevrolet Silverado, we're going to be taking a look at and showing you how to install the Tekonsha T-One vehicle wiring harness with four-pole flat trailer connector. That's part number 118384.Here's what our wiring looks like once we have it installed. It is going to provide us with a four-pole flat trailer connector so we have all the required lights to get down the road safely, like our taillights, turn signals, and our brake lights.The nice thing about our wiring is that we're not going to have to cut or splice into our factory wiring at all. It's going to have a simple T-connector that's going to plug in behind the bumper. If you have the factory seven-way, we're still going to be able to retain that function while adding another four-pole connector so we can hook up to multiple trailers. Our wiring is going to have loom protecting our wires and also help hide some of those colors while it's on the back of the truck.
It is going to have an included dust cup, will keep all the dirt and grime out of the connector. We can also use it to hang it off our safety chain loop.To begin our installation, we're going to come to the back of our Silverado, and right here at the bumper we're either going to have a seven-way plug or just this dummy plug that we're going to come right behind it underneath the bumper. Now on the back we'll have our wiring and we'll have this gray keeper tab. We're going to want to pull that out and hold onto it, but then we'll find the black tab underneath. We'll press it and we can pull our wiring out.
Then we can grab our new harness. Going to put a little bit of dielectric grease inside the connector. Hopefully that'll prevent any kind of corrosion from building up and moisture from getting trapped inside. We'll fill up the cavity. Then we'll plug it into the plug that we removed.
Then we'll take that keeper tab and we can put it back in place. We'll make sure it doesn't come undone. Then we take the other end of our connector and we're going to plug it back into the plug we removed it from. Make sure it locks in. Then we'll route our four-pole over the hitch so it'll by the receiver tube.I'm going to use my dust cover as a keeper to hold my four-pole up a little bit so I can see how much slack I'm going to need to tie up.
Then we just take some of the included zip ties and tie it to the hitch behind there.I went ahead and plugged in my four-pole tester so I can make sure that all the circuits are working properly. If you need one of these, you can pick one up here at etrailer.com using part number I26. We can see that my taillight function is working properly as well as the left turn signal and the right turn signal and my brakes. All we have left to do now is hook up to our trailer and hit the road. That'll finish up your look at the Tekonsha T-One vehicle wiring harness with four-pole flat trailer connector, part number 118384, on our 2018 Chevrolet Silverado.
Average Customer Rating: 4.9 out of 5 stars (245 Customer Reviews)
Quickly and easily install a 4-way trailer connector on your vehicle. This T-One typically plugs directly into the back of your factory-installed 7-way connector so you can retain the 7-way and also pull a trailer that has a 4-pole flat.The wire harness fit as directed. Simple and easy to install with plenty of length! 777448
unable to locate factory wiring to connect this harness to. sent a search party who said it was located inside of a frame member. still searching...there are NO wires showing under the vehicle and i have not started to pull apart the interior in a search as the weather is uncooperative. i do like the fact that the 4 wire in enclosed in a loom for protection. my last vehicle did not have that feature. it is thoughtful. 462005
I am very happy with the product I received. Perfect fit and working fine I highly recommend 649794
TRAILER WIRING HARNESS WENT TOGETHER REAL GOOD. IT ONLY TOOK A VERY LITTLE TIME TO INSTALL. THIS MADE INSTALLING MY LED BRAKE LIGHT KIT VERY EASY. 35167
Perfect fit on my 2012 Jeep Grand Cherokee. Hitch and wiring harness installed in 20 minutes. This is my fifth hitch and wiring harness purchased thru etrailer and have yet to be dissapointed. Both the video and written instructions were spot on, the installation of the wiring harness couldn't be easier! 34414
Part # 118384 is designed for Grand Cherokees with a factory tow package. Without the factory tow package, not all functions will work. In order to make it function, youll need to head to your dealer and have them re-flash either the Body Control Module BCM or Power Control Module PCM to fully activate that port.The other option is to use a harness designed for Grand Cherokees that dont have factory tow packages like part # 118425.
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Patrick B - 9/21/2012
Has met all my expectations 802629
Item performed as needed. Make sure you have the vehicle computer reset to recognize a new wiring device; otherwise it may appear to not work. 796067
Website easy to use and place order Fit well, no problems installing, very fast shipping. Product looks very well built. I would recemented this company to a friend 791444
Installs in 5 mins or less. Using this to plug into a rear brake light strip so I don't have to mess up the wiring on my truck. It fits perfect on a 2015 Ram 1500. 791201
The wiring package installed exactly as was shown on the video. Took maybe five minutes and everything worked exactly as it should 786844
Works great with a 7 way plug 785669
Hassle free installation! 775029
I am very pleased with the items quality and speed of the shipping process. I had a question concerning the items I purchased so I called customer service and was very satisfied with the polite and professional response I received. I highly recommend etrailer.com as a great place to do business with. 765627
This worked just as I would expect it to do. Helped me hook up a light bat and not have wires sticking out of the bumper. 763350
Product arrived quickly and well packaged. The hardware kit was secured inside the receiver with tape. They put cellophane on the receiver before wrapping it with tape so as to not leave a sticky residue. Overall great experience buying from this company. I would highly recommend! 762928
Everything it’s advertised as! Great price and @ 15 minute installation! Very very pleased. 740076
I purchased the hitch and plug N play harness for a Christmas gift they absolutely loved the gift and I loved the ease of navigating the etrailer web site purchasing, shipping and receiving was spot on it's been a year now and they still love it Thanks, etrailer Side note: I installed it on a Grand Cherokee installation was easy but you'll need a trailering download from your dealership to get the lights working I believe it was a labor charge of an hour 733182
Just as described, fast shipper A++++++ ++++ 729865
Always great service 721922
The product fit like a glove! Exactly what I needed, I am very happy with the T- connecter. I would recommend etrailer to anyone. I did not want to Compromise my original factory wiring and etrailer has what you need. 720077
Great website with videos, arrived early and did install myself in 30 mins and the dealer wanted $200 to install. Better than expected all the way around and would use etrailer again in heartbeat. 716220
The item 118384 fit my 2018 Tundra Limited perfectly, was easy to install and gave me the look I was seeking from my below tailgate light bar. After completing all the connections the light bar worked perfectly. 714286
Awesome product. 710529
bought hitch and wiring harness there is no instructions with wiring harness hitch went in quick but im stumped with the harness it say no cutting needed no directions either 706841
Rachael H - 10/04/2019I haven't installed it yet but it looks just fine. The box it came in seemed to have been opened, but so what. 703517
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