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  1. Custom Fit Vehicle Wiring
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  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 118433
Our Price: $44.53
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Custom Fit Vehicle Wiring

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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Custom Fit 118433
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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. Circuit-protected converter guards against shorts. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118433 or order online at Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (86)
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Tekonsha Custom Fit Vehicle Wiring - 118433

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 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 existing wiring - no cutting, splicing or tapping required. Circuit-protected converter guards against shorts.


  • 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 - no cutting or splicing of wires
    • Locate connection points in trunk
    • Plug in T-connector
  • Includes circuit-protected tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Provides protection against electrical shorts and overloads
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 5 amps per circuit
  • 1-Year limited warranty


This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located inside your trunk, behind the tail lights on both the driver's side and passenger's side. You will need to remove some interior trim or carpeting to access the harness.

Once installation is complete, the 4-way flat connector will be stowed within your trunk.

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.

Circuit-Protected 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.

This converter safeguards itself and your vehicle against possible electrical shorts and overloads with integrated short circuit protection. Just install the connector as indicated and rest assured that the wiring system of your vehicle will remain feedback-free.

118433 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118433 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118433

Average Customer Rating:  4.9 out of 5 stars   (86 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. Circuit-protected converter guards against shorts.


Order came in a week & was packed good. Online video & instructions made it easy to follow instillation. Hitch was installed in about 40 mins with no problems. Purchased the wiring harness (118433) also & install went well too. Love the way harness plugs in & you can route the wires out of sight! Simple/clean looking set up, would recommend to anybody this etrailer hitch for this car! Thanks etrailer


2009 Hyundai Sonata 3.3L. Installing this wire harness was indeed very straight forward, just unplug and plug it all back in again, I wished all wiring harnesses are like this. The video was also very well done. One thing I found out was the ground that was recommended, installing it on the screw that is part of the rear lamp housing was not a ground at all. I did find a proper ground connection just a bit down from this location, it has to black wires that is screwed into the body.

2008 Hyundai Elantra

Good Product. Needed a little persuasion to get it on, but it fit. Watch the installation video first. Trailer wiring is real simple. Used a piece of baling wire to route the left and right tail light connectors. Only had to pop loose the center piece and the tail light covers. You can cut a hole in a rubber grommet under the spare to feed the four flat connector through, and route it through the tow connector. Works great.

2008 Hyundai Elantra

I needed this harness, a hitch, some wire and connectors to get my car set up prior to its shipment to Germany. I was on a short timeline, as the car was to be shipped in 10 days after my order. etrailer knew none of this, but an hour after I placed my order on a Sunday, a CR rep emailed me to let me know the wire (not the harness) was not available to be shipped right away and that he was working on finding some in another warehouse. What company immediately get back with the customer to let them know there's an issue with their order? Not many, I can tell you. But because etrailer did this I was able to let them know my situation and they shipped out the rest of my order, which arrived in 3 days. Everything fits perfectly and was easy to install due to the extensive "how to" information on the site. Thanks etrailer, for making my buying experience a good one!

2006 Hyundai Sonata

Installed this along with a hitch from etrailer. Installation was extremely easy, took about 30 minutes from start to verification that everything worked. Another 10 minutes to button things back up again.

I really like the video demonstrating what needed to be done.

Excellent product, excellent shipping and excellent videos!


Works great.
The first one I received
was not fully functional.
I let you know, you sent the that now make my left turn signal work.
Your service has made me a fan.
Thank you!

Reuben S.


A year out and using both hitch and wiring harness have worked flawlessly. I’ve never had to think about either one. That is a good thing.

2009 Kia Optima

Hitch and wiring harness are top shelf. Took about 35 minutes to install both on my 2009 Kia Optima. This is the 4th DrawTight hitch I have put on my vehicles. Can't go wrong with a DrawTight.

2008 Hyundai Elantra

After installing the hitch it was getting late but decided to have a look so I would be ready to install in the morning. Less than 10 minutes later the lighting kit was completely installed, the trim was reattached, and no wires were visible (they are tucked out of the way in the spare tire area). The video and written instructions were spot on.

2010 Hyundai Sonata

Easy to connect and worked exactly as described. Took about 10 minutes to complete. What a great product that fit exactly for my 2009 Sonata SE. So happy with this purchase and the parts are great quality. Shipping came fast with the receiver hitch and great packaging. You wont go wrong with this product.

2007 Hyundai Sonata

Don't waste a minute of your time with a competitors product. Spend a couple more (or less) bucks to buy the perfect fit with etrailer. Compared to the "universal fit" that i started with, it's only a few dollars more but is installed sooooo much easier. It literally only took a couple of minutes to install this unit. etrailer's unit is less than half the price of comparable units I found from national auto part dealers. This is a great value and a great time saver. I highly recommend it!


Quick, easy and positive installation without cutting or putting clips on wires. Fast delivery too.

Fred D.


Still working just fine and is a quality product.


Easily installed. The video proved to be very informative and allowed quick and easy installation of the wiring harness.

Hyundai Sonata

Video instructions made it look too easy. Actual installation was as easy as the video made it look! I've owned several Draw Tite hitches and this light duty hitch for my Hyundai Sonata was of the same high quality as my heavier duty hitches.

2009 Hyundai Sonata

The installation was very straight forward, following the instructions and viewing the video made it easy. The only change I made was to put the ground on a chassis ground near the tail light assembly rather than grounding it to the tail light assembly.


YES YES!Absolutely use t-one connectors. They save SO much work and hide away when you're not using the plug. Makes the connection at the lights look factory. Well worth the money and VERY easy to install .. about 30 minutes to do it right.

2008 Hyundai Elantra

The hitch I got for my 08 Elantra fit great and was easy to install. I got the light kit and Iit was easy to install.To install both it took about 1.5 hrs. I am verv happy with the service and thr product,


Installed like a charmThe installation video was an enormous help. Little things like how to remove the plastic push in rivets become apparent from watching the video.

2010 Hyundai Elantra

Ordered hitch, wiring harness, and hitch draw bar for my 2010 Hyndai Elantra. The installation was so straight forward that it only took 20 minutes for the whole set up. I am very pleased with the product. Etrailer's service was exceptional.

2009 Hyundai Sonata

It's amazing how easy this makes wiring a trailer hitch.

2007 Hyundai Elantra

fit like a charm video was a great help only took about 10 mins to install if you pay someone to install this it would be a waste of your hard earned money its that easy will buy from etrailer anytime and have even given out your web site to my friends fast shipping also


Only problem I have is the ground connector to the trailer connector is a little tight putting together. Otherwise great product and very happy I found


Extremely easy installation and it had worked perfectly with repeated hard use. It was also very to identify which one to order for my car. The only thing I would have changed would be to purchase it sooner.

2010 Hyundai Elantra

Items were just as expected. The video on the website was very helpful and installation went very smoothly for me. I got just what I expected and was very pleased.


This product was perfect in every way.. from the video demonstrating how to install it before you purchase to the speedy delivery and the ease of installation.
I highly recommend this quality product.


Product was ordered in the morning and shipped same day.
Arrived safe and FAST.
Had several follow ups from the folks at Etrailer, It is quite possible I have found a comapny that remembers what it is to actually insure the customer is happy and satisfied..
I work for a Large Corp. , I see it has been forgotten in our own work and I see it at the places I service. Hurry in, get out, get paid.
etrailer is doing it right !!!

Show More Reviews

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

  • Which is the Correct T-One Wiring Harness for 2006-2009 Hyundai Sonatas
    I just looked up the 2006-2009 Hyundai Sonatas, and the T-One Wiring Harness, part # 118433, is in fact the correct wiring harness for those vehicles. I want to reassure that you did, in fact, order and receive the correct part for your vehicle. Sometimes the packaging on the parts can be misleading, as the parts may be compatible with several different makes, models and years.
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  • Trailer Wiring Recommendation for a 2010 Kia Optima
    Yes, I checked with Tow Ready and the Wiring Harness part # 118433 that you referenced has been confirmed to fit your 2010 Kia Optima so I would recommend it for you. I attached an install video that shows it being installed on a 2009, but the process will be the same for you.
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  • Can Wiring Harness # 118433 from 2010 Hyundai Sonata Fit 2014 Sonata Non-Hybrid Model
    Thank you for your 2011 purchase of a wiring harness. That actual part you ordered is Tow Ready harness # 118433 which is intended for 2006 through 2009 model years of the Sonata. It is not a confirmed fit for the 2010 Sonata, please note. The recommended harness for your 2014 Hyundai Sonata non-hybrid is Curt # C56049 which is shown in the linked video. This harness installs without any cutting or splicing of wires thanks to its custom-fit connectors. There is no resetting function for...
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  • Availability of a 2 Inch Trailer Hitch Receiver for a 2011 Hyundai Sonata Limited
    Draw-Tite trailer hitch # 24965 is a fit for your 2011 Hyundai Sonata Limited, but it does have a 1-1/4 inch hitch opening. I am sorry, but we do not have 2 inch hitches available for your vehicle. To wire your vehicle for towing, you would use custom-fit T-One vehicle wiring harness # 118433. Hitch # 24965 does not include a ball mount. You would also need a hitch ball if you plan on towing a trailer. You would most likely use a hitch ball with a 1-7/8 inch diameter, like part #...
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  • 2 inch Hitch Ball, Ball Mount and Wiring Recommendation for a 2008 Hyundai Sonata
    Anytime you use a hitch adapter you end up cutting the capacity of the hitch by 50 percent. Because of that I tend to avoid recommending them as an ideal solution. Since your trailer has 2 inch hitch ball coupler you would want the # 3592 for a ball mount and then for a 2 inch ball # 19258. For trailer wiring you would then want the part # 118433 which I attached an install video for as well.
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  • Recommended Trailer Hitch for a 2011 Hyundai Accent
    We actually have a ton of feedback on the Draw Tite Hitch part # 24795 being installed and used on a 2011 Hyundai Accent. This hitch has nearly a perfect rating from our customers who have it. If you go to the product page for the hitch and then click the reviews tab that is right above the product description you will see all of the feedback we have for this hitch. You may also be interested in purchasing the following products: Hitch Ball with 1-7/8 inch Diameter and Short Shank, part...
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  • What Do I Need to Tow a Motorcycle Trailer with a 2007 Hyundai Sonata
    The components needed to tow a trailer include a trailer hitch receiver, ball mount, pin and clip, trailer hitch ball, and a wiring harness. I have included an article which covers this. To get your 2007 Hyundai Sonata ready for towing, I recommend the following: Trailer Hitch - Draw-Tite Class I Trailer Hitch Receiver, # 24757. This is a custom fit hitch offering a 2,000 lb towing capacity and bolt-on installation. No drilling or welding is required. Ball Mount - Sportframe Drawbar,...
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  • Trailer Hitch Recommendation for a 2011 Hyundai Sonata Hybrid
    The Draw-Tite Class I 1-1/4 Inch Hitch, part # 24965, will fit your 2011 Hyundai Sonata Hybrid. This hitch does not include the ball mount. To install on your vehicle you will need to lower the exhaust and the heat shield will need to be trimmed. I am including a link to the installation instructions on the Draw-Tite. The instructions will show in detail where the heat shield needs to be trimmed. If you will be towing with this hitch you will also need the following items. Tow Ready 2...
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  • Does the Bumper Have to be Removed or Replaced to Install a Trailer Hitch on a 2010 Hyundai Elantra
    To install the Draw-Tite Trailer Hitch, # 24795, on your 2010 Hyundai Elantra, you will not have to remove or replace the bumper. There is some minor fascia trimming required. A tab on the bottom center of the fascia will need to be trimmed in order for the hitch to fit properly. I have included a link to the installation instructions that include an illustration of where this trimming will occur. I have also included an installation video on a similar vehicle. If you plan on towing with...
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  • Trailer Hitch and Vehicle Wiring Recommendation for a Single Exhaust 4-cylinder 2006 Hyundai Sonata
    Yes, the Draw-Tite Class I trailer hitch will fit all models of the 2006 Hyundai Sonata, including your 4-cylinder with single exhaust. Our tech tips note that vehicles with single exhaust, the appearance panel which covers driver's side frame rail must be removed. This is a Class I rated hitch that is rated for towing up to 2,000 pounds gross towing weight and 200 tongue weight, and is compatible with Class I 1-1/4 accessories only. Since it is Class I hitch, the manufacturers recommended...
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  • Does the Exhaust have to be lowered to Install a Trailer Hitch on a 2009 Hyundai Sonata
    Installation on a 2009 Hyundai Sonata with single exhaust is going to be nearly identical as in the video showing installation of Draw-Tite Trailer Hitch, # 24757, on a 2010 model. The two different years are part of the same generation and the hitch attaches the same way in both models. This is quite possibly the easiest installation I have seen for a hitch. Even the instructions, which I have linked for you, have just 2 steps. Neither our installers nor the hitch manufacturer mention...
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  • Hidden Hitch # 60872 vs. Draw-Tite # 24795 for a 2010 Hyundai Elantra
    The main difference between the Hidden Hitch Trailer Hitch Receiver, part # 60872, and the Draw-Tite Trailer Hitch, part # 24795, is that the # 60872 (no longer available) has a drawbar, pin and clip included with it, whereas the # 24795 does not include those things. Aside from that, they are so similar in design that they even share the same installation instructions. I attached the instructions and a video of this product being installed onto a similar car as yours below for you to...
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  • Will Draw-Tite # 24795 Fit my 2010 Hyundai Elantra with a Recovery Tow Loop
    The Draw-Tite hitch #24795 will fit your 2010 Hyundai Elantra as long as it is the Sedan model. We have test fitted the product on a Hyundai Elantra with a tow loop and I attached photos of the hitch on the vehicle. The hitch sits right in front of the tow loop and it does not interfere with the use or installation of the hitch. If your Elantra is a Touring Hatchback, this hitch will not fit and you will need Draw-Tite Hitch Receiver #24844. This hitch has a powder coat finish to ensure...
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    Image 1 for
  • Hitch Recommendation for a 2007 Hyundai Elantra Sedan
    I have a hitch that is confirmed to fit your 2007 Hyundai Elantra sedan, but the part # C11493 that you referenced will not fit. Instead, you would want the Draw-Tite part # 24795 as it has been confirmed to fit your vehicle. I attached an install video for this hitch for you to check out as well. This hitch does not come with a ball mount but does have a pin and clip. To complete your towing setup you may also want the part # 118433 for wiring, # 19256 for a 1-7/8 inch hitch ball, and...
    view full answer...
  • Will the Draw-Tite Hitch # 24757 Fit on a 2010 Hyundai Sonata SE, with Dual Exhaust.
    Yes, the Draw-Tite Sportframe Class I Trailer Hitch, item # 24757, will fit on your 2010 Hyundai Sonata SE, with dual exhaust. The under body appearance panel noted in the instructions, is only present on single exhaust models and needs to be removed for hitch installation, dual exhaust models do not have this panel and the hitch installs without removal of any parts. To complete your Class I Towing setup you may also want to consider the following items. Custom Fit Vehicle Wiring # 118433 Ball...
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  • Will Tow Loop on 2010 Hyundai Elantra Interfere w/ Trailer Hitch Installation
    The hitch will fit perfectly, no worries. When we installed the Draw-Tite Class I hitch, # 24795 on a 2010 Hyundai Elantra, we found that the receiver tube will sit just aft of the tow loop you mentioned, as you can see in the photo I've provided. If you plan on using the hitch for light duty towing, you'll need a few other items to complete your towing system: Trailer wiring harness, part # 118433 Ball mount, part # 3594 1-7/8 inch trailer ball, part # 19256 or 2 inch ball # 19258 Pin...
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    Image 1 for
  • Will Draw-Tite Trailer hitch # 24844 Fit the 4 Door Sedan Model of a 2009 Hyundai Elantra
    We have several hitches that are specifically designed to fit the 2009 Hyundai Elantra sedan. The trailer hitch that you have referenced, # 24844, is designed to fit the 2009 - 2011 Hyundai Elantra Touring Hatchback, so it will not fit the sedan. The difference is that # 24844 has a longer receiver tube so it is not too far under the vehicle. The Sedan rear end has a different shape so the receiver tube is shorter. The comparable trailer hitch for a sedan model is # 24795. I have included...
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  • Trailer Hitch Receiver Availability For a 2008 Hyundai Sonata Towing a U-Haul Trailer
    Currently the only receivers available for your 2008 Hyundai Sonata are class I like the Curt Trailer Hitch Receiver # C11325. This is mostly due to your Sonata having a maximum towing capability of 200lbs tongue weight and 2,000lbs or total trailer weight. Be sure to check your owners manual for your maximum towing capacity. Curt recommends using the Ball Mount # C45521 in the rise position. You will be able to use either a 1-7/8" Ball # C40001 or 2" Ball # C40018 with the U-Haul trailer....
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Do you have a question about this Custom Fit Vehicle Wiring?

Info for this part was:

Employee Patrick B
Expert Research:
Patrick B
Employee Joshua S
Video Edited:
Joshua S
Employee Nicholas E
Test Fit:
Nicholas E
Employee Rick A
Test Fit:
Rick A
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Isabelle B
Updated by:
Isabelle B
Employee Cole B
Installed by:
Cole B

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