T-One Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
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2025 Ram 2500
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2025 Ram 2500
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No more cutting, splicing, or dealing with complicated wiring systems. The T-One Vehicle Wiring Harness is designed to seamlessly integrate with your factory tow package. Simply plug it into the OEM wiring harness behind your rear bumper to quickly connect a 7-way trailer connector. This means you can power your trailer’s signal lights without any hassle, ensuring a straightforward setup and a smooth ride.
The ModuLite power module included in this wiring harness ensures that your vehicle's 3-wire system is compatible with your trailer’s 2-wire system, combining brake and turn signals effectively. This reduces the chances of overloading your car’s electrical system while maintaining the integrity of both vehicle and trailer light signals. This converter is built to last, ensuring your trailer lights operate flawlessly without any additional strain on your vehicle’s circuits.
Designed specifically for vehicles with factory tow packages, this harness delivers a custom fit for a variety of vehicles, including the Honda Pilot. It seamlessly connects to your vehicle's existing wiring, ensuring compatibility and reliable performance. With this harness, you can rest assured knowing you have a solution that’s perfectly matched to your vehicle's specifications.
Whether your trailer uses a 4-pole, 5-pole, 6-pole, or 7-pole connection, this wiring harness has got you covered. It’s compatible with several adapter types (sold separately), providing versatility no matter what trailer type you’re towing. This adaptability lets you tackle various towing situations with ease, whether it’s a small utility trailer or a larger RV setup.
Worried about corrosion affecting your connections? The T-One Vehicle Wiring Harness includes a recommendation to use a small amount of grease on all electrical connections. This feature helps protect against corrosion, ensuring a longer lifespan for your connectors by protecting against moisture and the elements. This simple preventative measure ensures reliability trip after trip.
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Easy install fast shipping and a great price.
The product was as advertized. Shipped quick and easy install.
I just ordered this part last evening at 8 pm and I received a noticed that it has shipped at noon the very next day. Excellent Service!!! You can't beat this!!!
I reveived the trailer harness Saturday morning.
I installed it Saturday afternoon.
It fit well and was easy to install.
Easy Install if you know which harness you need. My 2012 Honda Pilot EX-L 4x4 DOES NOT have the factory tow package installed but everything is there except this kit. So it installed just fine!
Only issue I had was that 118265 doesn't fit with bracket 18138. The holes do not line up. So, on my Honda Pilot 2012 I just cut a round hole in the plastic bumper where the connector is to be located and bolted it on. Seems to work well.
Everything's working great. The only problem I had was getting the cap off the Pilot's connector under the rear bumper. Turns out you must detach the connector from its mount before the cap can be removed. Took the Honda mechanic 30 minutes to figure that out after I gave up. Would have been nice if the instruction sheet mentioned that.
Easy to install, worked as advertised, inclusion of some mounting bolts would been nice but they were easy to pick up from the local hardware store. Customer service was great.
Nice product that is a fairly easy install. Kit includes everything except the 4 bolts / nuts to hold the plug. My local hardware store supplied me with nice stainless steel nuts & bolts. This was a great savings over Honda Dealer price.
Very easy to install once I figured out the sequence for the harness and module. The enclosed instructions could be a lot clearer on the installation procedure. Also, it should be noted that for vehicles without an existing 7 prong or 4 prong reciever that you would need a metal bracket to attach it to.
This trailer wiring kit not only was an amazing product but was also completely fool proof to install. From start to finish it took me about an hour. Product quality is top tier and works great. Will be using etrailers products in the future. Thanks for an excellent experience.
Brooke M.
7/7/2025
Wow, that's great, Gary! So glad we could help you with the right product. What will you be towing with the new harness in place?
Brooke M.
7/9/2025
This was great; the instructions were detailed. It took me about 15 minutes to install and operated flawlessly. I commend the E trailer staff at helping me secure this after a delayed delivery due to shipping issues. The key thing is they stood behind the product and kept me informed as to delivery issues. In my mind, that's great customer service. Way to go, team!
Put on a 2015 Honda Pilot. Checked out a few youtube videos that were poorly explained but enough for someone like myself to do it better. Very much plug and play except for the mounting. Connections have been solid and no problems to report after a year of use. I'd say I tow about twice a month.
Bbot
5/27/2025
Was asked for a one year report but it is really two. Matters not, it is still working as expected with zero issues.
Nick S.
5/28/2025
Needed a trailer wiring kit for my 2014 Honda Pilot EX. I am not mechanically inclined, so excuse me for some of the things that may not make sense to you. After reading all the great reviews contributed by the customer plus a few videos on the web, I felt I should be able to handle this task. This product gets 4 starts instead of 5 due to the fittings of the 7 way plug and the black box module. First, there was a variance with the 7 way plug mount. As most of the reviewers used 1/4"-20 sized screws, these were too wide for the kit I received. I ended up replacing them with 10-24 x 3/4 stainless and 10-24 stainless Hex nut with #10 stainless washers. I am sure Nylock's may be fine but I do not have experience with them or removing them. The rivets are a great idea but they are a pain to remove if you need to remove this mount one day. Used a 2" hole saw and cut a piece near the top of the mount. I wanted as much flat surface as possible, and drilled the holes with a 3/16" bit. Next I located the plug under the car that connects to the 7 Way. Just remember it's on the driver side behind the exhaust pipe. This is probably the worst part of the install, or I would call the Grey plug of death. Most videos will show people trying to remove it and cut to the part where it's removed... I guess all the cursing and the head banging was edited out. I tried to pull it apart with an adjustable wrench and it did not budge. Tried to push the long grey clip near the wire to see if it will release, no deal. At this point frustration will set it and you feel compelled to rip the thing apart with whatever tools you have... don't. First get a flat headed screwdriver and gently release the blue tab that holds the plug. Then again, "gently" pull it off the car and wrap the wire around the exhaust to the back of the bumper. You must remove the blue tab off the plug, push on the small release tab on top and push the blue tab off. The blue tab acts like a locking mechanism, it keeps the plug from separating. Apply some dielectric grease and connect to the 7 way wire. Run the wire under the bumper and plug it into the 7 way mount. Before you do that, push back on the gray tab on the top and apply some dieletric grease, plug it in and push the lock in. Like previous reviews, this plug does not fit perfectly so the locking mechanism on mine was useless. It sits tight enough though. Use zip ties to secure the wires, you don't want it to flop or when it comes time to use the spare tire, you don't want the tire to rip the wire off the mount. Onto the black box. On left side of truck, open the hatch, and open the inside hatch. Use a flat head screwdriver and pry open the fuse hatch. If don't have a silver box inside the big hatch, use you left hand to install the white plug.. if you have a silver box like me, you have no choice but to install the black box with one hand. Locate the white plug inside the fuse hatch, take the white plug on the black box and attach it with your hand, palm side up. The wire is stiff enough where it will line up and make sure you hear the click. Push the wire back and slide the black box along the metal clip until the tab locks in. My box didn't fit along the clip, so I zip tied around the black box and slid the box where the tab goes under the zip tie. Open your hood, it's the fuse box to the right next to battery. Open and install the fuse. Test the lights and you are good to go. I painted the screws so it matches. So it loses a star due to the poor manufacturing of the 7 way and the black box. The product is great and etrailer gets 5 stars. Good luck with the install, should take less than an hour if you can remove the blue tab quickly and get the right screws.
Bill L.
6/27/2018
Product still working great and holding up. Only complaint, if I had one was the connection I mentioned, it didn’t not click and lock like it was suppose to.. but as long as it was tight, it’s fine. Another great product from etrailer Thank you for asking
I just purchased a new 2013 Honda Pilot EX-L/Nav and tow package. The odd thing to me is that Honda installs a nice hitch, but no wiring. I shopped a number of on-line services as Honda prices (even discounted) are absurd. As always, I ended up at etrailer.com. To be candid I was not excited about messing with wiring on a new vehicle, but this wiring harness is (#118265) AWESOME! All in it might have been an hour, but directions and all fittings were perfect. I would not recommend the mounting box as it simply is not required.
There is a clearly identified area next to the hitch where the recepticle will be installed. We simply used a hole saw on a cordless drill and did a bit of trimming. Once you get the hole "right" it's as simple as drilling pilot holes for the 4 corner. We used stainless steel screws (1/4" x 20 x 1.5" and 1/4 x 20 x 1") and stainless nylock nuts to secure the recepticle even though the screws actually threaded up snugly with the bumper cover.
All in all, a very tidy installation! And as always, customer support was awesome!
Ron W.
4/10/2014
The wiring kit has been used extensively over the past year and continues to perform perfectly!
The product, OEM Tow Package Wiring Harness with 7-Way Connector - 118265, was exactly what I needed. I installed this myself in a 2012 Honda Pilot EX-L that comes with an incomplete tow package (no wiring harness). Installation was easy with the instructions and a little research. All plugs were exact fits.
I used a hole saw and cut on the opposite side of the hitch since the harness reached without issue. The application is a little different than the Honda configured cutout. I purchased 4 each of screws, washers, and lock nuts for less than a dollar and secured the connector. I had a mechanic test the connection and everything checked out.
Dustin
8/30/2014
Hi Casey, I have the exact same pilot, and I am confused about what i actually need for the wiring. Some sites indiacte i need to take out the third row, open up a panel, and do some installations inside the vehicle. Form the comments here, it sounds like all that is required is to plugg the harness into the existing receptacle behind the bumper and install the 7 pin plug on the bumper beside the hitch. Did you have to do the long way or the easy way?Dustin
Casey B.
9/2/2014
Dustin - Connections that are made inside are through the panel which are accessible without removing seats. I think I just laid the third row down for access. The other connection is behind the bumper. Its an easy application as far as harnesses go. Cutting the hole and fitting plug was the most difficult part. A dremel type tool for cutting and shaping the cutout is recommended.
Great product, easy to install and a perfect alternative to the much more expensive Honda harness for my 2012 EX-L. Just a couple of things to note: 1: There is a metal tab in the AUX FUSE box that can be used to mount the black box module. The box is not a perfect fit on the tab unfortunately, but you can get creative with zip ties, etc. to make it work. 2: The grey connector attached above the driver side exhaust tip has a release lever on the back. You can't see it, but it's there and once you're able to move the lever, the connector will release so you can remove the factory cap and connect the 7-way harness to it. Afterwards, just slide it back into the original location and listen for the engagement click.
Also, I was not too excited about drilling a 2 inch hole in my bumper and the additional four holes to mount the receptacle into the factory "punch-out" location like many others here did, and instead came up with a different option. I crafted a sturdy mounting bracket from some aluminum stock and attached the receptacle to the mount point right behind and next to the punch-out in the bumper. I like this better as it's concealed, required no drilling and is still easy to access. Pic attached of what I did.
Patrick B.
8/29/2014
There is a bracket and hardware kit that is sold separately, over in the related parts section, that includes a bracket and all the needed hardware. Its part # PK12711U.
Well made with all the connections already attached. Easy to follow instructions which made installation a breeze
Needed a harness for my 2015 Honda Pilot LX and didn’t want to pay a king’s ransom for dealer parts and install. Ordered from etrailer and got a deal. Came with everything I needed and also had excellent, easy to understand instructions. Works perfectly.
Randy B.
6/1/2020
This harness has worked like a charm. No problems at all.
The install was super plug and play and much cheaper than other options out there.
Was as described and install was easy.
Perfect product. the wiring Fits perfect. Recommendation, the connector behind the bumper, the video shows remove the connector cover using a tongs with it in place. I spend more time trying to remove the cover than the complete installation at all. If remove the connector from the purple clip that hold it, you will save a lot of time and headache removing the cover. I also purchase the mounting bracket but didn't use it. I just cut a hole that the 7 pin connectors pass thorough and attached it to the bumper with the hardware that came with the bracket. It holds very rigid.
I purchased this for my 2013 Honda Pilot EX-L. I have not used the wiring harness yet, but the installation was extremely easy and quick. The instructions were very straightforward, and I was able to install everything within 30 minutes. Everything you need is inside the package except some bolts/nuts to mount the connector. I decided to cut out a hole and drill some holes for bolts. I opted for some black ones to match the colors. I'm extremely happy with this product and etrailer's fast and reliable service.
This trailer harness is easy to install and works great. It looks factory! I highly recommend! Price is reasonable too! You don’t have to go to [trailer rental location] and pay them to [rig up] a harness back there. You can do this yourself with this kit
This kit is very easy to install on my 2012 Honda Pilot EX-L and came with almost everything needed to install it. It was only missing 4 screws to secure the 7 pin plug onto vehicle’s the plastic trim but any type of small screws or bolts would work. Definitely recommended to anyone who’s looking to install a 7 pin trailer harness.
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Patrick B.
8/29/2014
For those that dont want to attach it to the bumper, there is a hardware and bracket kit available. Check out part # A10-9394VP.