T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
(91 reviews)
Price: $53.56
In Stock
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Item # 118478
Retail:$93.34
Our Price: $53.56
You Save: 43%
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- Reviews (91)
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Tekonsha Custom Fit Vehicle Wiring - 118478
- Custom Fit
- Trailer Hitch Wiring
- 4 Flat
- Powered Converter
- Tekonsha
Quickly and easily install a 4-way trailer connector on your Lexus RX 350 with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system.
Features:
- Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
- Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
- Connects quickly and easily
- Locate connection points in rear cargo area
- Plug in T-connector
- Run hot lead to car battery
- Includes ModuLite to ensure that your vehicle's wiring matches that of your trailer
- Powered module connects directly to battery to avoid overloading vehicle's electrical system
- Constructed of 16-gauge bonded wire
- Comes with dust cap for 4-way flat connector
Specs:
- Maximum amperage:
- Stop/turn lights: 2.1 amps per circuit
- Tail lights: 5.6 amps per circuit
- 1-Year limited warranty
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 interior trim panels in your rear cargo area. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery and insert the provided fuse.
Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area.
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.
ModuLite Powered Tail Light Converter
A ModuLite power module 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. This power module functions as a tail light converter to combine 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.
With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.
118478 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite
Installation Details
This Product Fits The Following Vehicles
- 2004 - 2006 Lexus RX 330
- 2004 - 2006 Lexus RX 330
- 2007 - 2012 Lexus RX 350
- 2007 - 2012 Lexus RX 350 without factory tow package
California residents: click here
Customer Satisfaction Score:
89% were satisfied with this product
11% of customers were not satisfied
- Wrong item was ordered
- Product did not meet expectations
- Alternate product found
Customer Reviews
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118478
Average Customer Rating: 4.8 out of 5 stars (91 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. Powered ModuLite reduces strain on wiring system.by: Jerry 02/12/2024
Worked perfectly, video instructions were very clear and easy to follow.
I work in the automotive connector industry and this harness is first rate.
by: 06/24/2023
Not the right harness for 09 Lexus RX350. Had to order OEM harness from dealer which was plug and play and easy install
by: Christopher 08/14/2023
This trailer hitch and wiring works like a charm Extremely happy!
by: Kirk 01/11/2023
2006 Lexus RX 330
as advertised.
Kirk
1/12/2024
I have experienced no problems with my wiring harness. I strongly recommend it for its ease of installation and its ease of use.
by: LSJ05/10/2021
2010 Lexus RX 350
Very Clean install. Installation video was concise and easy to follow. Between the Trailer, trim cutout, and electrical install with Item #118252, I was done start to finish in about three hours.
by: Lance11/20/2023
wish they had a video of the install pr ocedure.
by: JW10/18/2013
2015 Lexus RX 330
The hitch fit on my 2005 Lexus RX330 with no problems. It took only about 15 minutes to install by myself. (no helper) . The wiring harness ( Part # 118478) installed as advertised. The vidio provided by e.trailer was a big help. All lights worked with no problems.
Jw
10/18/2014
It works as advertised. No problems after a years use.
by: Bill M11/21/2013
2013 Lexus RX 350
I installed the wiring harness on my 2013 Lexus RX350. Instructions were clear and all the parts worked fine. Good product and excellent response from etrailer.
Bill M.
11/21/2014
All good. Thanks
by: Jon David07/08/2020
I ordered and installed a trailer hitch complete with wiring on our Lexus SUV last year.
As it was made specially for the vehicle, it was a perfect fit using the existing frame holes. I watched a couple videos for the wiring harness install, then proceeded easily to hook up the harness under the length of the vehicle and used the supplied connectors. You need to be able to jack up the car with a floor jack and safety stands in the rear first. Then let the rear down, jack up the front and finish securing the harness along the framing. Then let the car down and finish the simple hook up to the battery ( Of course if your battery is in the rear you will be done faster. ) I like the product, enjoyed doing the install myself.
by: Herman J Lueckenotte06/03/2017
Ford Edge
I recently purchased my third trailer hitch from e-trailer for personal use. The hitch is relatively easy to install, but the wiring can and could be more difficult,. But with e-trailer you tube instillation for different cars, makes it almost a joy.
However, I don't have access to a lift, and must do the driveway thing. I also did a modification with the wiring. I measured, and remeasured a couple of times to see if it could a better looking and fixed position rather than having the tell tale appearance with the colored wiring hanging out the tailgate.
I double wrapped that wiring with electrical tape and used the plug that is behind the wheel, and about ten inches forward of the hole with the power wire.
I removed the plug, cut a hole 1/8 X 3/8, and then cut a line from the outer edge of the plug to that hole. That size worked perfectly for the glued together four wires as a single flat wire. then I went down thru it with the cut toward the front of the car so as to not create a gap in the plug that could widen with the pressure of the wire(s). I then went toward the back of the top inf the hitch bracket where there was a indentation with a fixed small split rubber hose to minimize wiring abrasion, then over toward the center of the hitch.
I'm now waiting for the mounting plate for the small bracket (which I have), mounting in a fixed position where it will not be subject to items such as tree limbs etc, and other road debris...won't bother the wiring.
Also, when wiring to the battery post, with the movie clip as suggested, there's a small little 1/2 X 1/2 piece to be broken/cut out of the cover plate for the positive end of the battery cable...otherwise the cover won't snap down on both wires.
Also saw a previous comment about the receiver part being a nuisance bumping the leg. From previous (e-trailer) hitches, I have a receiver light that is much softer than the hitch receiver, and has a rubber foam surround. The plastic light is much less injurious.
The hitch and wiring is no less well engineered.
Thank you for your ability for shipping.
I ordered the hitch about 1530 one afternoon, and received the hitch the next day around 1430...less than one day via UPS...excellent service.
by: Jim K08/08/2016
Written instructions are INCOMPLETE! WATCH THE VIDEO!
I purchased this brand over the Curt product simply because the written instructions were clearer. Or so I thought.....(See "Installation Details" PDF at the end of the respective product descriptions and compare for yourself).
During installation, I found an additional plug on the RH side of the vehicle that wasn't mentioned in the instructions. Not knowing what to with it, and being in somewhat of a hurry, I let it be. And then I forgot about it.
After installation I asked my wife to check all the lights on the trailer as I hit the switches in the car (Me: "Right turn?" She: "Yup!", etc, etc), so I thought all was well.
So we hooked-up the trailer and headed-out.
About an hour later we were pulled over by one the "Boys In Blue" who said the brake lights on our trailer didn't work. "Can't be", I thought to myself. Sure enough- nothing! (Thankfully we were close to home again, he seemed to be sympathetic and understanding, and so he let us go w/o giving us a ticket.).
When we got home I looked at the instructions again, and I did everything right!
However, the installation video (around the 2:30 mark), AS WELL AS THE INSTRUCTIONS FOR THE CURT PRODUCT, explain where this other/second plug gets connected. Trust me, it's not immediately apparent where it goes, but had I had PROPER INSTALLATION INSTRUCTIONS I wouldn't have made this mistake in the first place!
Everything seems to work fine now, but shame on T-One for providing incomplete instructions (and shame on me for forgetting about that plug).
by: Douglas06/23/2020
The hitch fits perfectly. Arrived without a scratch on it. I installed it myself (with the help of my floor jack) and was easy. The only "hitch" was that after I had almost completed the install,, I saw that if I had tightened the bolts all the way, the spare tire might have been pinched by the hitch cross member and maybe not been able to be freely lowered. So I had to loosen the bolts and pull the tire cover clear while I tightened the bolts to complete install. The wiring took longer than the video shows only because of access. But running it forward to the battery was no problem. The videos were very helpful, though. And, everything works perfectly. Thanks, E-Trailer.
by: Robert 08/21/2022
2004 Lexus RX 330
Pretty easy to install although I did ask my auto maintenance dude to put it up on his lift and run the wire underneath from trunk to battery as I'm past my years of climbing under cars!
WORKED LIKE A CHAMP TO MOVE MY OLDEST VIA U-hAUL trailer from NW Florida to Nashville with no issues.
by: Evan07/21/2020
The lighting system worked well after I bypassed the main box and sort of followed the directions on the video. The hitch did not completely fit. I was only able to get 5 out of the 6 bolts in because the hitch was not welded correctly to align with the vehicle (I verified that I had ordered the correct hitch for my vehicle and that my frame was not bent). Then after really pulling on the hitch I was able to get the 6th bolt in yet was still unable to fully tighten it down because the hole was too close to the side plate. It works, but I feel like it could have been so much smoother if the hitch welding was aligned properly and the electrical kit instructions were more clear for my vehicle (again, I checked to make sure that I ordered the proper kit).
by: Mike S.03/17/2015
Hi Mike . . . received the 'hitch' on Saturday, March 14th, 2015.
Everything in the box was complete. It took me about 45 minutes to install - there were no problems except I had to borrow a 'breaker bar' from my neighbor to remove the two 'pull hooks' that were attached to my frame from the factory. I was amazed how easy the frame mounted with the provided brass bolts fitting EXACTLY into the holes in the frame.
The instructions were perfect! I am 74 yrs old and used a heavy duty box to hold up the other end of the hitch while I attached the left side - a little easier to get to the frame than the 'exhaust' side.
The 'wire harness' was another story. The instructions were very tiny and I could not grasp how to hook up the various electrical connections. . . Oh well, I will pay out $80 to have the electrical mounted by our local garage in town.
I would still give eTRAILER an 'A' for a excellent, sturdy, attractive hitch that will do a great job for me. Many thanks to Mike S for his assistance in purchasing this item. Give him a raise!!!
by: Mike C11/17/2017
Bought a plug and no cutting or other wiring problems trailer wiring kit for my auto trailer hitch. I simply gave them my auto info and got the right kit. Followed a utube video and everything worked perfectly. Jumped into the car and headed to Arizona with lights blazing. Thanks etrailer.
by: SRCinOH07/17/2011
Lexus RX 330
I was impressed with the quick delivery and the kit contained everything needed for installation. All of the wiring was sized perfectly for a RX330 and installation (with re-assembly) took about 3 hours. I ran the power wire on the inside of the car (driver side under the step-in covers) and used an electrician's fish tape to help pull the wire from front to back. I definitely recommend this kit for other Lexus RX330 owners.
by: Mike10/01/2022
I had a shop install your kit, they said they normally use your product. It works as it should
by: John07/17/2019
The trailer hitch wiring harness for my Lexus RX330 was exactly as suggested and went in as easy as the video showed. The wiring plugs fit easily in the cars existing sockets. Package was delivered on time and had all the necessary parts included in the box. Great product and it works—what a concept!
by: John07/17/2019
The trailer hitch wiring harness for my Lexus RX330 was exactly as suggested and went in as easy as the video showed. The wiring plugs fit easily in the cars existing sockets. Package was delivered on time and had all the necessary parts included in the box. Great product and it works—what a concept!
by: Len F.08/04/2015
The hitch was on in 15 minutes and fits perfectly and does not limit the spare tire at all. Nice design though I wish it did not stick out from the bumper, but there is no other way because of how the car is made. The wiring kit is great and well designed. Getting the panels off to get to the vehicle wiring is the biggest hassle and the double sided tape did not stick. But it all hooked up and works great. Thanks etrailer for a great product!
by: Chris V.05/15/2021
2004 Lexus RX 330
I have purchased a few items from etrailer and have not been disappointed. I have a boat trailer, a travel trailer and a truck with kayak racks so I'm often looking for things to make my world a little better. etrailer has been a good resource.
by: Tony 05/23/2023
2004 Lexus RX 330
product work as described, easy to install as product comes with everything I need in order to finish the job.
by: Steve05/31/2016
Lexus
Trailer wiring was so easy but the last part sucks you have to run a wire all the way to the front under vehicle to battery. But not matter which one you get you will need to do that. Lexus should of thought a little. Watch the video on how to install
by: Ryan05/12/2020
2007 Lexus RX 350
I am very happy with your service, and the quality of my purchase. The hitch fit perfectly and looks great. The biggest help were the instructional videos you posted which are vehicle-specific...I watched, followed instructions, and completed the job. Thank you for offering a great product, with great prices, with great instructional assistance.
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view full answer... - Recommended Trailer Hitch for 2009 Lexus RX 350I would recommend the Draw-Tite Trailer Hitch # 75153 over the Curt # 13530 for your 2009 Lexus RX 350. Curt has been revising their instructions on many hitches to include that per their warranty with any non-trailer load, like bike rack or cargo carrier, you will need to use a stabilization strap like # 18050, but the Draw-Tite brand does not require this. I currently don't see that note for this hitch yet, but for a few extra bucks, in my opinion its worth the piece of mind to go with...
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view full answer... - Trailer Wiring Harness Installation Location on a 2010 Lexus RX 350 with Factory Tow PackageThe connection point for trailer wiring harness # 56083 is located behind the rear bumper, on the driver side. I have included a picture and a link to the instructions that show this for you. That connection point may be there even if the vehicle does not have the factory tow package. The easiest way to determine how the vehicle is equipped is to call a dealer service department and have them run the VIN through their system. They can tell you if you have the tow package or not. If you...
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view full answer... - Will Curt Class III Hitch, # 13530, Fit A 2005 Lexus RX 330 AWD And Is A Converter Box NeededThe Curt Class III Hitch, # 13530, will fit your 2005 Lexus RX330 AWD. It has a towing weight capacity of 3,500 lbs. and a tongue weight capacity of 350 lbs. The dealer is talking about the wiring harness needed for towing. Because your vehicle has LED tail lamps you do need an upgraded circuit protected taillight converter for the wiring system on your vehicle. It protects your Lexus from electrical shorts and mis-wire situations. I do have the Tow Ready T-One Wiring Harness, # 118478,...
view full answer... - 7-Way and Brake Controller Recommendation for 2004 Lexus RX 330You will need to start with a 4-way (if you do not have one). For that you would want the # 118478. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions and an install video for this product as well. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake...
view full answer... - Trailer Wiring Harness for a 2010 Lexus RX 350 without Factory Tow PackageIf you did not order the tow package for your 2010 Lexus RX 350, then you will need to use wiring harness # 118478. The connection point for the tow package harness may be present but there are other components and wiring that needs to be done to make it fully functional from the factory. You can always have a dealership run the VIN of the vehicle to determine what options it has. I have included a link to the installation details for the 118478 wiring harness for you to view. I have...
view full answer... - Recommended Trailer Wiring Harness For 2009 Lexus RX 350It sounds like your 2009 Lexus RX 350 does not have the factory tow package. It may have the fuse in the fuse holder but the package was never installed. If that is the case then I recommend a wire harness like part # 118478. This harness has a power module that combines the brake and signal functions. This harness plugs into the connections points behind the driver and passenger side trim panels. You then need to run the hot lead wire to the positive battery post. if you are not the...
view full answer... - Can Spare Tire Be Accessed with Curt Trailer Hitch Installed on a 2006 Lexus RX 330You can still access the spare tire on your 2006 Lexus RX 330 with Curt trailer hitch # 13530 installed. You will not have to remove the hitch to lower or replace the spare. Since the hitch does partially block the spare you will need to angle it out or in as needed. A coworker has a hitch set up like this and he says that it is still easy to lower and replace the spare. If you plan on doing some towing I recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with...
view full answer... - Trailer Wiring Harness for a 2012 Lexus RX 350You are going to need a trailer wiring harness that requires a separate connection to the vehicle battery, # 118478. The purpose of the power wire is to actually power the trailer lights. This adds another layer of circuit protection between the trailer wiring and vehicle wiring. The wiring on the vehicle is not designed for the extra load of the trailer lights and could damage the vehicle wiring; something you do not want to happen. Routing the power wire is easy, it just takes time....
view full answer... - No Lights On Trailer When Using Curt Wiring Harness # 56083 On 2010 Lexus RX350 Without Tow PackageOn your 2010 Lexus RX350 without a tow package, you would need to use Tow Ready Custom Fit Vehicle Wiring, # 118478. I have included a link to the installation details below. This harness includes a circuit protected converter and requires a direct connection to the battery. This connection to the battery virtually eliminates power draw from the vehicles taillights, which protects the sensitive wiring. The Curt T-Connector Vehicle Wiring Harness with 4 Pole Connector, part # 56083 is for...
view full answer...
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Katrina D.
7/8/2023
This harness will only fit if your 2009 Lexus RX350 without a factory tow package. Can you please confirm whether you have the factory tow package or not?