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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
THIS ITEM IS NOT A FIT FOR
2022 Ram 3500

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Item # 118252
Retail:$37.74
Our Price: $23.94
You Save: 37%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2022 Ram 3500

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118252 - No Converter Tekonsha Trailer Hitch Wiring
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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 OEM tow package port - no cutting, splicing or tapping required. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118252 or order online at etrailer.com. Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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Tekonsha Custom Fit Vehicle Wiring - 118252

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • No Converter
  • Tekonsha

Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into OEM tow package port - no cutting, splicing or tapping required.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point behind rear bumper
    • Plug in connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's factory tow package wiring harness, which is located just behind the rear bumper.


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 plug on your automobile and the 4-pole connector itself - to help prevent corrosion.



118252 Tow Ready T-1 T-Connector - OE Replacement 4-Flat

Installation Details 118252 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - 118252

Average Customer Rating:  4.8 out of 5 stars   (319 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 OEM tow package port - no cutting, splicing or tapping required.

by:
2017 Lexus RX 350

Hitch and wiring harness installed in less than an hour and half! 2017 RX 350 was equipped with towing package. The converter behind the panel on the rear passenger side. The harness plug was above the end of the exhaust pipe, driver side.



by:

This is the second harness I have ordered. They work so well and the set up is excellent. I love that they have instruction videos linked to the product. Makes the job that much easier. When I need one in the future I’ll definitely be buying it from from etrailer.



by:

Easy and complete instructions to insta ll.



by:

This hitch was very easy to install. I did not have to lower the exhaust. I
just had to pull down a little for the hitch to slip over it. My vehicle was
already prewired from the factory so the wiring was simple plug and play.
One connector just had to remove the factory connector cover and plug it the
harness and route harness along hitch. A couple of long tie wraps, black
electrical tape or any other type of tape would work great for running the
harness along the hitch (not supplied). I am attaching several pictures
after the installation. It looks great and is very well hidden. Receiver is
all that shows with wire connector. There is about 12 to 18 inches of wire
above the facia that can be pulled down for use if needed. Very glad I
ordered the Curt hitch #13541 and T-One wiring Harness for the Factory Tow
package #118252. By the way Great service from ordering over the phone to
delivery.

John G.

4/16/2014

The hitch on my 2012 and wiring harness are working out great. I even took it to my dealership and they added it to the their records on my vehicle, showing that I added the hitch and harness. They were also impressed with the way I trimed around the hitch, hiding as much as I could. My wife didnt even notice it for a week. This was the first time I used it. Good job with the design and fitment.



by:

Just installed Draw Tight hitch, wire assembly along with the brackets for a nice look. Everything went smooth with installation and it has a nice clean look as the hitch is well hidden. This is going to work for our bike rack and the cargo carrier I am now going to by. Now I can also get a small utility trailer to pull and haul stuff. I strongly recommend etrailer for all your needs as they communicated with me the whole way through and readily replaced a lock unit that somehow came without the key. Customer service is top notch.

Scott N.

4/26/2020

Absolutely Fine!



by:
2017 Lexus RX 450h

Waiting to plug it into my Lexus tow kit wiring!



by:

got wrong wire harness package number is 10110411058 this on bag with harness



by:

Woring Harness did not work with the vehicle provided. I had to hard wire the system myself.



by:

Instructions are great - A bit of work but well worth it.



by:
2006 Toyota 4Runner

My 2006 4Runner had a factory installed mounting plate for the trailer wiring hub that was a bit challenging to leverage with this harness. I was able to work though that and make it work though with some zip ties. It would be nice if future versions contemplated those factory mounts.



by:

Product worked as expected and is high quality.



by:
2020 Toyota Highlander

FITS the new 2020 HIGHLANDER! There is a new connector with the 2020 Highlander redesign under the driver side rear bumper. This cable plugs directly into the Highlander connector. See photo. There is no need to route or run wires for the trailer wiring. You will also need a converter to provide the correct signals to this cable. I recommend using the Toyota Plug-n-play converter part number: PT725-48200. It’s around $60 online. Be aware it is installed behind a panel located next to the driver’s side second row seat. Toyota completely changed the vehicle wiring for the 2020 model year. I also recommend the CURT C99FR hitch. Fits perfectly, easy to install and hides behind the bumper.



by:

I've installed several trailer hitches in the past. The only way this installation would have been any easier would have been the young lady, taking the order, agreeing to come over and do it. I'll install these hitches all day for half what [the vehicle dealer] charges.

The 3 plastic/rubber plugs, on the left side, pop right out and the 2 tow bracket bolts, on the right side of the car, unscrew easily with a 19mm socket. I didn't have anyone to hold up one end of the hitch so I used an upside bucket to hold one end up while putting the two bolts in the other side.

The heat shield never came close to contacting the hitch, so no adjustments were needed.

The wiring harness was also easy to install. There's a pre-wired plug on the left side of the car near the exhaust pipe the harness plugs into. This car was ordered with the towing package so it's my understanding the harness is all that's needed.



by:

Everything aligned perfectly and I had the hitch and wire harness installed in less than 30 mins, solo.
So easy without a lift or jacks

Ray

4/9/2023

Everything fit perfectly and was easier than expected to install



by:

I ordered and received a trailer hitch and wiring kit for my 2015 RX350 and also received a very informative video with it. It fit great and is almost invisible and no drilling was necessary. The only issue I had was I was supposed to reuse 2 of the bolts to rehang the exhaust but my bolts were tapered on the end and wouldn't fit so I had to use some generic bolts. But it's still a great product.



by:

Was absolutely a plug and play system on a lexus RX350. I did use a marine stainless steel ring clamp to secure the trailer plug side of the holder for my application rather than the recommended installation. Directions were well written.



by:
2016 Lexus RX 350

I got the trailer hitch the rubber hitch cover and the wiring harness delivered in 5 days from the day that I put my order in, very easy to install nice and tucked underneath the bumper,very well built and very well priced.



by:

The wiring plug and harness were an exact match to original specifications for a 19 year old factory install except for turn signals were reversed, this was a minor fix. The final price was OK, but I was disappointed that the website had shown a price of $14.08 less than 12 hours before I placed the order. When I placed the order the following morning the priced jumped to $20.08 plus shipping. After all is said and done, still a great value for the money.



by:
2013 Lexus RX 350

Etrailer,
Very pleased with the service
and feedback on my order of a wiring harness for my 2013 Lexus RX350. Both the customer service and the ordering staff contacted me and indicated that the wiring harness was correct for my vehicle. My order arrived on-time, and the shipping package was in excellent condition. I recommend Etrailer products, relieable customer support, and prompt shipping method.



by:

Quality was excellent



by:

Packaged and delivered VERY quickly. Everything fit as it was supposed to, and installation was a breeze. UPS banged the parcel around a bit, and a couple of more pieces of cardboard as padding wouldn't have hurt, but a quick shot with black spray paint covered the dings.



by:

Works as advertised. I installed a pair of these on our new cars in under an hour...the wiring was truly "plug and play!"



by:

I order this part 118252 with the Hitch and it works perfect for my 2019 Lexus RX350 F Sport.



by:

Great product. The wire harness fit my vehicle perfectly. Another excellent experience with etrailer.



by:

Worked fine. No issues

Ralph

6/12/2023

Great. No problems. Used a few times

Etrailer Expert

Mike L.

9/6/2023

@Ralph Awesome, we're glad to hear that the # 118252 trailer wiring harness is working well for you!

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320
Show More Reviews

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • Recommended Trailer Hitch and Wiring Harness for 2019 Lexus RX350 F1 Sport
    I have a solution for you, but the Tekonsha # 118252 is designed for the 2019 Lexus RX350 F1 Sport with the towing package Additionally, it's only a 4 way and if your RV has a 7 way plug you'll need to add that as well.. You'll want to use the Tekonsha # 118255 which comes with the converter box that will plug into your tail lights and allow you to power the lights on a trailer and provide you with a 4 way plug that is the base of any 7 way connector that doesn't come factory installed...
    view full answer...
  • Troubleshooting No Trailer Lights With New Wiring on 2015 Lexus RX 350
    Not necessarily. If your 2015 Lexus RX 350 came with the tow package then you just need the T-One # 118252, but if it doesn't have the tow package then you need the T-One # 118255 with the converter. The tow battery fuse slot would only be used if you were installing a 7-Way. Since the connector for the lights just have 4 pins for the trailer lights and ground I don't think it will really matter if you have a fuse in the tow battery slot or not. Before purchasing a wiring kit with the...
    view full answer...
  • Troubleshooting Wrong 4-Way Flat Pin Size After Accident with 2012 Lexus RX 450h
    I've never heard of different-sized 4-Way flat connectors so I'm guessing the original 4-Way installed on your 2012 Lexus RX 450h is still there and was damaged when you were rear-ended. If you swap it out with the T-One # 118252 this will fix your problem. You can try adjusting the pins on your vehicle-side 4-Way but I would be concerned about damaging something on the wiring or your vehicle so swapping everything out is a better solution. Attached is an installation video of this wiring...
    view full answer...
  • Trailer Wiring Harness # 118252 Not Working on a 2012 Lexus RX 350
    The trailer wiring harness, # 118252, is for a 2012 Lexus RX 350 that came with a factory tow package. It sounds like your RX 350 does not have the factory tow package so you would need to use trailer wiring harness # 118478. If your vehicle is supposed to have the factory tow package (have the dealer run the VIN to determine if it does or does not have the tow package) then the missing components to make it active could be obtained through a dealer. I have included a link to the installation...
    view full answer...
  • Correct Trailer Wiring Harness for a 2007 Kia Sedona
    The correct T-One Vehicle Wiring Harness for a 2007 Kia Sedona is part # 118410. This harness is plug-n-play but it plugs in behind the tail lights. There isn't a tow package port on the Sedona so they don't make an option like the T-One Vehicle Wiring Harness part # 118252. I know this means more work but it's still a splice free option which is a huge plus. It's not difficult either per se, just takes more time. If you don't already have a trailer hitch in mind, the Draw Tite Trailer...
    view full answer...
  • Recommended Trailer Harness Bracket For 2015 Lexus RX 350
    The Curt Trailer Hitch # C13143 is confirmed as a fit for your 2015 RX 350. This hitch has a 2-inch receiver opening. The # 118252 wiring harness will work well for you if your Lexus has a factory tow package. If you do not have the factory tow package you will need part # 118255. There are a couple ways you can attach the 4-way trailer connector. You can use a bracket like part # 18144 which screws and nuts needed for installation. You can go the no-drill route by using either part...
    view full answer...
  • Troubleshooting T-One Wiring Harness Connection for a 2013 Lexus RX 350 with Factory Plugs
    It sounds like you're describing the T-One Vehicle Wiring Harness for Factory Tow Package # 118252 and how it connects to a 2013 Lexus RX 350. With these types of connections you might need to remove a dummy plug for the T-One to install correctly. If you have some photos of the connection I can take a look if you send them to me. I'm also attaching an installation video of this harness on a 2013 Lexus RX 350 for you to check out as well.
    view full answer...
  • Recommended Trailer Hitch, Wiring Harness, and Ball Mount For 2018 Lexus RX 350 Towing Trailer
    For your 2018 Lexus RX 350 I recommend the Class III etrailer Trailer Hitch Receiver # e94AR which is a confirmed fit for your RX 350. For a vehicle wiring harness I recommend the # 118252 since you mentioned you have the factory towing package. This will plug in directly to the factory port underneath the driver side of your rear bumper. Moving on to a ball mount, hitch ball, and hitch pin and clip I recommend going with the etrailer Ball Mount Kit # 989900 as it includes two ball mounts,...
    view full answer...
  • Torque Rating for M12 Hardware on Curt C13143 Hitch Installation on 2015 Lexus RX350
    Because the torque ratings can change according to the nature of the hardware that Curt sources, we don't publish the torque ratings in case they should change. I've linked to the current installation instructions for the Curt # C13143, the correct torque ratings are listed on page 5, step # 13. If you'll be towing with the hitch, you'll also need a trailer wiring harness like # 118252 for vehicles with the tow package or # 119250KIT for vehicles without the tow package. You'll also need...
    view full answer...
  • Troubleshooting No Power at Factory Port on 2017 Lexus RX 350 without Factory Tow Package
    If your 2017 Lexus RX 350 didn't come with the factory tow package then an additional harness with a powered converter is needed to actually activate the plug that you used to install the Tekonsha T-One Vehicle Wiring Harness # 118252. This Tekonsha harness is designed for vehicles that came equipped with the factory tow package. Unfortunately, the converter harness is not available as a separate item from the manufacturer so your only option is to get the Tekonsha T-One Harness # 118255...
    view full answer...
  • Items Needed to Tow a Trailer with a 2011 Lexus RX350 Without Tow Package
    To tow your boat trailer with your 2011 Lexus RX350, you will need a trailer hitch, wiring harness, ball mount, pin and clip and a hitch ball. For a trailer hitch, I recommend the Draw-Tite Class III Trailer Hitch, # 75676. This trailer hitch has a 4,000 lb towing capacity and a 400 lb tongue weight capacity. It is important that you verify the towing capacity of your vehicle before you attempt to tow a trailer. If your vehicles towing capacity is less than of the hitch, you will need...
    view full answer...
  • Wiring Harness Options for a 2014 Lexus RX450h
    Yes, that is consistent for your 2014 Lexus RX 450h as well. I checked the online owner's manual for your vehicle and the fuse locations were the same. You can verify this with your copy of the owner's manual as well. I found the fuse location charts started on page 694. If you do have the factory tow package then part # 118252 is what you are needing. If you do not have the factory tow package then the T-One # 118255 is what you need instead. This has the same wiring harness for the 4-Way...
    view full answer...
  • Is Rear Damper of 2016 Lexus RX 350 F Sport Removed for Hitch Install
    Since the Curt Hitch part # C13272 installs by simply raising up into position at the rear of your vehicle and then bolting it into place there would be no need for you to remove the rear damper or any body panels to installation. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch...
    view full answer...
  • How to Determine if a 2011 Lexus RX350 has a Factory Tow Package
    The definitive way to determine if a vehicle has a factory tow package is to have a dealership run the VIN number through their system. They can then tell you how the vehicle is equipped. If you are looking to do some towing I recommend Curt trailer hitch # C13143 that you have referenced. You can then use the etrailer ball mount kit # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin with clip, and a storage bag. If you find that you do not have the factory tow package and need...
    view full answer...
  • Hitch & Related Towing Components for 2014 Lexus RX 350 AWD to Tow Travel Trailer with Brakes
    We can help you with all the items you'll need to get your RX 350 ready for trailer towing. Starting with a hitch, I suggest the Curt 2-inch Class III hitch # C13143. This hitch installs without drilling and includes all the mounting hardware. The linked video will show you the entire process. You'll also need a Class III ball mount and a hitch ball of the size required by your travel trailer. The linked article will help you select a ball mount with the right amount of rise or drop to...
    view full answer...
  • Fit of Curt C13282 on 2020 Lexus RX450h
    According to Curt, their # C13282 Class III hitch is a fit for all models of the 2016 - 2020 Lexus RX 450h. If you'll be using the hitch for towing, you'll need a few other items. For the RX450h, use # HM11141945 for vehicles equipped with the factory tow package, or # 119250KIT for vehicles without the tow package. For a ball mount, use # C45010 and # 19260 for the 1-7/8 or # 63845 for a 2 inch trailer ball. You'll also need a # PC3 hitch pin. If you click the provided link, you can...
    view full answer...
  • Will Tekonsha 118255 Fit 2021 Lexus RX 350
    Yes, the Tekonsha 118255 will fit your 2021 Lexus RX 350. It sounds like you don't have the tow package, which is why this comes with the powered converter unlike the # 118252. The same is true with the Curt. The # 56083 is for vehicles with the factory tow package and the # C56217 with the powered converter is for those without.
    view full answer...
  • Wiring Harness on 2016 Lexus RX 350 for 5-Way Connector on Trailer with Surge Brakes
    For a 5-way trailer connector on your 2016 Lexus RX 350 you'll first need a 4-way. If the Lexus includes the tow package you can use # 118252 which will plug into a connector just under the rear bumper. If it does not have the tow package then # 118255 is what you'll need which has a 4-way that plugs into the same place, as well as a ModuLite power module that plugs behind a trim panel in the rear cargo area. Once you have a 4-way you can then use # 47515 which plugs into the 4-way and...
    view full answer...
  • Vehicle Wiring Harness For A 2004 Nissan Pathfinder.
    The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118361 will give you a 4 flat connector and will make it to where your trailer's stop, turn and taillights will mirror your vehicle's stop turn and taillights. The # 118252 is not confirmed to fit your 2004 Nissan Pathfinder. This custom fit T-One connector plugs into your vehicle's wiring harness, which is located inside your trunk or rear cargo area, behind the tail lights on both the driver's side and passenger's...
    view full answer...
  • Trailer Hitch and 7-Way for Towing with 2019 Lexus 350RX
    The first thing you need to tow a trailer with your 2019 Lexus RX 350 is a trailer hitch like the # C73DR which is mostly hidden and has great towing capacities. Then for trailer wiring you'd need to start with a 4-way like the part # 118255 which is a confirmed fit. If the trailer does not have brakes you'd need the part # 37185 to convert to a 7-way or the part # ETBC7 with a brake controller like Brake EVN # TK63VR for if the trailer has brakes.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2010 Lexus RX 350
    The most reliable method is to take your VIN to a Lexus dealer and they will be able to say for certain if you have the tow package. If you have the original window sticker for the vehicle when you bought it should be listed there as well. Or you can look for the plug that the # 118252 would plug into on your vehicle and use a circuit tester like # PTW2993 to test to see if the pins of the connector are active. Check out the install video I attached to see how to find the plug. Otherwise...
    view full answer...
  • Everything Needed to Tow a Trailer with a 2017 Lexus RX 450h
    For just the electrical side of things for your 2017 Lexus RX 450h we have the Tekonsha T-One # 118252 as long as you have the factory tow package. This gives you a 4-Way for the basic trailer light functions. One you have installed the T-One harness the next step is to install a 7-Way. For this we have the Upgraded Wiring Kit # ETBC7L. This includes everything that you need for a fully functioning 7-Way and a brake controller. Since the wiring on your RX 450h is a bit more complex than...
    view full answer...
  • Parts Needed to Tow Trailer with 2017 Lexus RX 350
    I took a look at the online version of the owner's manual for your 2017 Lexus RX 350 and it didn't mention any requirements when it comes to a larger radiator or transmission cooler for towing. With that being said adding a transmission cooler to help keep temperatures down is never a bad idea. Since your Lexus, even if it came with a towing package, is deigned primarily as a passenger-and-load-carrying vehicle it's going to be working extra hard when pulling a trailer, especially when...
    view full answer...
  • Recommended Trailer Hitch And Wiring for 2016 Lexus RX 450H F Sport Model
    I called my contact at Curt and asked about your 2016 Lexus RX 450H F Sport. The Curt Trailer Hitch Receiver, part # C13282 is confirmed as a fit. This is a Class lll hitch and it has a 2-inch receiver opening. Per the instructions the lower rear fascia needs to be removed and trimmed and then re-installed. If you plan on doing some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4...
    view full answer...


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