1. Custom Fit Vehicle Wiring
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  4. Trailer Hitch Wiring
  5. 4 Flat
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T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

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

Item # 118245
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Custom Fit Vehicle Wiring

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Tekonsha No Converter Custom Fit Vehicle Wiring - 118245
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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. Call 800-298-8924 to order Tekonsha custom fit vehicle wiring part number 118245 or order online at etrailer.com. Free expert support on all Tekonsha products. Guaranteed Lowest Price 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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  • Reviews (85)
  • Q & A (23)
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Tekonsha Custom Fit Vehicle Wiring - 118245

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

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.



118245 Tow Ready T-1 T-Connector - OE Replacement 4-Flat



118245 Installation InstructionsInstallation Details 118245 Installation instructions

This Product Fits The Following Vehicles

2001 - 2002 Toyota 4Runner with factory 4-flat

2001 - 2003 Toyota Highlander with factory 4-flat

2001 - 2002 Toyota Land Cruiser with factory 4-flat

2001 - 2007 Lexus LX 470 with factory 4-flat

2001 - 2003 Lexus RX 300 with factory 4-flat



California residents: click here


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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118245 Review

Today we're going to be taking a look at part number 118245. This is a wiring harness for your factory tow package. It's going to provide your 4-pull flat trailer connector. Now, this is going to fit certain years and models of the Toyota Highlander, Toyota Land Cruiser, the Toyota Forerunner, the Lexus LX470, and the RX300. Again, it's going to provide that 4-way flat trailer connector at the back of your vehicle to power your trailer signal lights. This is designed for use with the factory tow package, and it is going to be compatible with 5-pull, 6-pull, and 7-pull adapters.

Those adapters are sold separately. The benefit of a system like this is that it connects very quickly and easily. You don't have to worry about cutting and splicing any wires. All you have to do is plug the connector into the connector on your tow package. It's constructed of 16-gauge bonded wire. It's got a nice, protective wire loom 00:00:51that goes around all the wiring.

Here on the 4-way flat side we're going to have the dust cap, and that is included; it's built into that housing. That's going to protect our connection points when our connector is not being used. It's also going to come with a fuse. This is designed to be used when installing this unit on a Toyota Highlander or RX300, and you can do that or find that information out in the included instructions. The maximum amperage for this unit it 7.5 amps per circuit. Now, when it comes to the installation, the custom fit T1 connector is going to plug into your vehicle's factory tow package wiring harness.

That's going to be located just behind the rear bumper. Then once you have that plugged in, the 4-way flat connector can be stowed beneath the vehicle near the trailer hitch. You can loop it around the safety chain loop, or you can get a mounting bracket. Your mounting bracket is going to be sold separately. That will help keep the connector secure.

It's also recommended that you use a small amount of dielectric grease on all your electrical connections, like the plug on your vehicle and the 4-pull connector itself to help prevent any type of corrosion from settling in. That's going to do it for our review of part number 118245.


Customer Reviews

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - 118245

Average Customer Rating:  4.9 out of 5 stars   (85 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.

- 118245
by:

The wiring Harness work Outstanding! 725410



- 118245
by:

Worked great and easy to install... a few YouTube video were much better than the instructions. 722223



- 118245
by:

Hitch and light pigtail were ordered. Draw Tite round tube Hitch was a perfect fit and on in less than an hour. Lights: Easiest hook up ever! Lights were working in minutes after opening the box. Perfect online ordering experience! 719254



- 118245
by:

The part was a female and I needed a male. The description said it was the right part however I had to end up cutting and splicing the wires. 670906



- 118245
by:

this wiring harness took one minute to hookup and has been working fine for a year. 658674



- 118245
by:

Great, will order again , from this sit e. 650061



- 118245
by:
2010 Lexus RX 300

Bought RX300. Took it to my garage for checkout and service. They installed trailer harness incorrectly so brake light would not work. Reading etrailer product description and instructions to see if car had a towing package, found plug where they said to look. Ordered part, installed it, connected to trailer and all functions worked perfectly. Only problem that needs correcting is spare fuses only had a 25 amp and not 20 amp so used that for checkout in towing slot. Will need to get some 20 amp fuses next time I go to town. I would give etrailer 10 stars for clear instructions that I could use before I ordered part, easy to order, good delivery tracking info, and follow up after order delivery. Will always check this site for trailer issues from now on. 603397



- 118245
by:
Toyota 4Runner

Bought this to replace my factory Toyota harness that had broken in a spot I couldn't easily splice back together. This fit the factory plug, and while not an exact factory duplicate, it fits well enough in the bracket intended to hold it under my hitch well enough that I'm not too worried about it falling out. My 4runner came equipped with a tow package, so it was plug-and-play. No need to add an additional fuse or make any other modifications. I've used it several times pulling trailers and everything worked as it should right out of the box. 601374



- 118245
by:
2002 Lexus RX 300

This trailer connection was plug and play on my 2002 RX300. Took less than a minute once I was on my back under the car. I just unplug when I am not pulling a trailer. 582779


Comments
Harness has held up with no corrosion or wires breaking. I use the hitch about 4 times a year making sure to replace the cover over the connection when not in use.
Robert - 11/15/2019

63351

- 118245
by:

Wiring harness was easy to install. Made attaching the four pole flat trailer connector a snap. 582073



- 118245
by:
2003 Lexus RX 300

Very fast service - great experience 526218



- 118245
by:
2002 Toyota 4Runner

Product is fine. 512964



- 118245
by:
2002 Toyota Highlander

Happy with the product i have received a quality Company to do business with 501019



- 118245
by:
2003 Lexus RX 300

Works great. Easy to hook up and no problems after a year of use. 491093



- 118245
by:

Plug and play just like the description! 485950



- 118245
by:

Super easy to install. Works great. Zero issues. 474755



- 118245
by:
2003 Lexus RX 300

The product was "plug and play" ready! Priced right and promptly delivered! 437323



- 118245
by:

The harness works perfectly. Installation was a snap! 406598



- 118245
by:
2003 Toyota Highlander

I first went to local supplier to purchase the hitch and their price was over twice as expensive compared to etrailer and the closest install time they could provide was several weeks. I then went on line and found etrailer. They delivered within 1 week and at a great price. The hitch and wiring was easy to install and it's been trouble free for over a year. I would highly recommend etrailer to family and friends without hesitation. 401245



- 118245
by:
2002 Toyota 4Runner

Got the harness In great time . Product fits perfect plugged in and working great . 2002 4Runner . 389211



- 118245
by:
Lexus

If your Lexus is equipped with trailer tow package, then this is the way to go. It puts trailer electrical load on separate fuse from auto and definitely beats hacking into auto wiring. Both big pluses. 379117



- 118245
by:
2001 Toyota 4Runner

The item fit perfectly into my 2001 Toyota 4runner and it look good with the black plastic wires cover. Shipping time was fast too. Thanks 369591



- 118245
by:
2015 Lexus RX 300

The wiring harness was a perfect fit to the factory trailer connector on my 2002 Lexus RX 300. The universal brackets for the plug allowed me to securely mount the plug on my round tube [vendor] hitch. I found the factory plug in the exact location shown in the video. Although installing these items is not rocket science, the videos relating to them saved the time that could have been spent figuring it out. All in all a 15 minute job. 365126



- 118245
by:
2001 Toyota 4Runner

Good product and great service 360101


Comments
All good, Will purchase from your company again when needed. Thanks for the follow-up.
John D - 04/02/2018

36739

- 118245
by:

Product works excellent as it's supposed too. Etrailer Has came through and will be my new all time go to for ALL my trailer needs . 344995


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Show More Reviews

Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

  • Recommended Wiring Harness for Factory Tow Package For 2002 Lexus RX300
    If you are installing the Upgraded Circuit Protected ModuLite with 4 Pole Harness and Hardwire Kit # 119179KIT, on the 2002 Lexus RX 300. (Just discovered that this product also works with a tow package.) The recommended product is the T-One Vehicle Wiring Harness for Factory Tow Package 4-Pole Flat Trailer Connector # 118245 designed to work with your factory tow package. This custom-fit T-One connector plugs into your vehicle's factory tow package wiring harness, which is located...
    view full answer...
  • 4-Way Trailer Connector for a 2004 Lexus GX 470
    The T-One # 118245 that you referenced will fit a 2004 Lexus LX 470 or RX 300 but for your GX 470 you need the universal harness # 119179KIT or # 119147KIT if your vehicle didn't come with the tow package. If your Lexus is the GX 470 and it did come with the tow package and you are wanting to use a 4-Way instead of a 7-Way then you can use the Hopkins Plug-In Simple Vehicle Wiring Harness # HM43374 instead which has both a 4-Way and a 7-Way connector.
    view full answer...
  • Recommended Parts to Tow a Trailer with a 2002 Toyota Highlander
    You're certainly not leaving yourself a lot of time. The trailer hitch receiver I recommend for your 2002 Toyota Highlander is the Draw-Tite Class III # 41541. The 2 inch receiver will have give you the full capacity of the Highlander and also give you a lot more variety in accessories that will fit. If your Highlander has a wiring connector just behind the rear bumper then you have the factory tow package. In which case I recommend using # 118245 for the wiring harness. If you...
    view full answer...
  • Recommended 4-Way Flat Connector for a 2014 Toyota FJ Cruiser
    I do have a solution for you to add a 4-Way Flat wiring connector to your 2014 Toyota FJ Cruiser but unfortunately the T-One Vehicle Wiring Harness # 118245 won't fit. Instead what you will need to use is one that tees in behind the tail light housing. I recommend the T-One # 118405 because we have found the Tekonsha wiring to be the most reliable. This tees in behind your tail lights and then draws power directly from your battery so as not to overload your wiring system. Attached...
    view full answer...
  • Troubleshooting 4-Pole Wiring Harness on 2003 Lexus RX300
    Tekonsha 4-pole wiring kit # 118245 is the correct OEM replacement harness for the 2003 Lexus RX300 with factory tow package. If you checked the fuse and tested the pins on the 4-pole plug and have no power on any of the 3 circuits I suggest you unplug the harness and test the OEM connector on the vehicle where this part plugs in. If you have signals there, upstream of the 4-pole harness, then the harness may be bad. If you do not have signals there then there may be an issue within...
    view full answer...
  • Connection Points for Trailer Wiring on a 2003 Toyota Highlander
    I would be glad to help you out with adding trailer wiring to your 2003 Toyota Highlander. The Tow Ready Harness, # 118413, is designed to plug in line with the tail light wiring behind each tail light on the vehicle. Inside the rear cargo area, behind the tail lights, there are access panels that allow you to get to the tail light wiring connectors. All you have to do is unplug them and plug in the connectors on the wiring harness in line with the vehicle wiring. Ground the white...
    view full answer...
  • Factory Trailer Wiring Harness Connection Point on a 2001 Toyota Highlander
    If your 2001 Toyota Highlander came with a factory tow package then there is a connection underneath. But if it did not come with a tow package the connector will either A) not be there or B) not be functional. On vehicles that have the connector it is located behind the rear bumper. On some, it is located behind the bumper and inside of a plastic box. Take a look at the instructions I have linked for harness # 118245 which should help you locate the harness if it is present on the...
    view full answer...
  • How Do I Know If My 2002 Toyota Highlander Has The Tow Package
    If your vehicle has a functional factory tow package there will be a connector at the rear of the vehicle behind the rear bumper. This connector could possibly be inside a black box that is mounted under the vehicle. If the connector is present you will need to test it with a circuit tester, item # 40376, if you need one, to make sure it has stop, turn and taillight functions. If the factory tow package connector is not present or the wiring is not functional to the connector, you will...
    view full answer...
  • 4-Pole Trailer Wiring Harness for 2007 Toyota FJ Cruiser
    Tekonsha wiring harness # 118245 fits various Toyota and Lexus vehicles but for your 2007 Toyota FJ Cruiser the harness that is recommended is Tekonsha part # 118405. This harness plus in at your taillights and requires only one wire be run up to the engine compartment for connection to the battery + terminal through the included fuse holder. I have linked a video and an installation article to help you see the process. If you test the 4-prong connector under the bumper of your FJ with...
    view full answer...
  • Adding a Second 4-Way Flat Connector to Activate Brake Lighting on a Truck Cap
    I do have a solution for you, but we do not have any adapters that will plug into the Tekonsha T-One # 118252 and provide 2 female 4-Way flat connectors. Instead, I recommend installing the 4-Pole Hardwire Kit with Circuit Tester # 18252 and splice it into the T-One # 118245 right behind the female 4-Way. This kit comes with 6 feet of wire so if that is too much you will want to cut it before splicing the wiring together color for color. Please note that part # 118252 that you referenced...
    view full answer...
  • Product Comparison Between Vehicle Wiring Harness C55245 vs 118245 for a 2001 Lexus LX 470
    I can help compare the # C55245 and the # 118245. These two wiring harnesses are designed to do the same job for wiring up your 2001 Lexus LX-470 the only real difference is the manufacture that they are distributed from. The # 118245 is designed and distributed by Tow Ready a company owned by Cequent Manufacturing and the # C55245 is designed and distributed by Curt Manufacturing. Both harnesses plug in the same way and provide a 4 pole connector for your vehicle end. For your...
    view full answer...
  • Best 4-Way Trailer Wiring Harness for a 2002 Toyota Land Cruiser
    The correct 4-way trailer wiring harness for your 2002 Toyota Land Cruiser is the T-One Vehicle Wiring Harness part # 118245. The connector that you have attached a photo of is not the correct one. The correct one will be located directly behind the rear bumper or in a small black box located under the vehicle (see photo). You will need to remove the four screws and open the box if the connector is not located in the above location. Please keep in mind that there will be several unused...
    view full answer...
  • Wiring Harness for a 2003 Toyota Highlander
    The wiring harness you referred to, product number 118248, will not fit your vehicle. You will need either wiring harness part number 118413 or 33425 for your 2003 Toyota Highlander. If your vehicle has the tow package, please use item number 118245. This is the connector which plugs into the white plug you found. There are instruction sheets for each of the parts listed on their product page. For your convenience, I have attached links to all of the items I referred to. I have also...
    view full answer...
  • Recommended Trailer Wiring Harness for 2001 Lexus RX300
    If your RX300 has the factory tow package, you can use the Tow Ready # 118245 which will plug into the connector located behind the rear bumper (see linked instructions). If your RX300 does not have the tow package, the trailer connector will need to be hardwired into the existing wiring use the Tow Ready # 119179KIT. I will include a link to the general installation instructions as well as an installation video. Although the video shows the harness being installed on a different vehicle,...
    view full answer...
  • Trailer Wiring Harness for a 2003 Lexus RX 300 without Factory Tow Package
    The wiring harness you have, # 118245, is designed for a 2003 Lexus RX 300 that came with the factory tow package. Since the harness is not working that is one indicator that you may not have the factory tow package and would require a different wiring harness. For a 2003 Lexus RX 300 without the factory tow package use wiring harness # 46255 you have referenced or # 119179KIT. I have included links to the installation instructions for you.
    view full answer...
  • Trailer Wiring Harness Options for a 2001 Toyota Highlander
    You can use wiring harness # 118413. It is designed for use on a 2001 Toyota Highlander that does not have the factory tow package. Wiring harness # 118245 is for models that came with the factory tow package. On wiring harness # 33425 the 12 volt power connection is what powers the trailer lights. On harness # 118413 it gets the power and signals for the trailer lights through the vehicle wiring. Having a powered converter that connects to the vehicle battery is another way that the...
    view full answer...
  • Installation Instructions for Tow Ready Connector # 118245 and # ETBC7 on a 2002 Toyota Highlander
    As long as you follow the installation instructions for the Tow Ready Custom Fit Vehicle Wiring # 118245 and the Brake Controller 7 & 4 Way Installation Kit # ETBC7 everything will be powered correctly and will work fine. I attached installation instructions for both products as well as an installation video for the # ETBC7.
    view full answer...
  • Troubleshooting Wiring Harness Install on 2003 Lexus RX 300
    The T-One Vehicle Wiring Harness for Factory Tow Package # 118245 is a plug-in for a 2003 Lexus RX 300 and would only require you to place a 20 amp fuse like shown in the accompanying photo and linked video to the install of this part on an '03 RX 300. Uninstall the connector and see if the light on the dash goes off. If so, try re-installing it by following the same steps as in the video. If the light remains on I recommend having your vehicle looked at by a mechanic to determine the issue...
    view full answer...
  • Location of Brake Controller Connector-2011 Jeep Grand Cherokee w/ Factory Tow Package
    The Tekonsha # 3045-P is the correct brake controller harness for your vehicle. The connector that the 3045-P plugs into is located under the dash to the left of the steering column taped to another wiring harness near the emergency brake pedal. In some cases, there's a trim panel under the dash that needs to be removed. If you click the link I've provided to the installation video, you can see where the connector is located at the 1:10 mark. The 3045-P plug is compatible with Tekonsha...
    view full answer...
  • Brake Light & Turn Signal Will Not Work on One Side of a Trailer Connected to 2008 Toyota FJ Cruiser
    The easiest way to determine if the problem is on the vehicle side or the trailer side is to do a little testing. First, with the trailer disconnected, have someone sit in the tow vehicle to operate the lighting functions. Then use a circuit tester such as # 40376 to test the connector on the tow vehicle. If the connector does not show any power when it is supposed to then the issue is on the vehicle. If it does work as it should then the issue is on the trailer. On the vehicle side...
    view full answer...
  • Tow Ready Custom Fit Vehicle Wiring # 118245 Recommendation for a 2001 Toyota 4Runner
    That harness you found would plug into the gray connector of the Tow Ready Custom Fit Vehicle Wiring # 118245 that you referenced and thats all you would need to do to have a working 4-way on your 2001 Toyota 4Runner.
    view full answer...
  • Parts Needed to Install a 7-Way Trailer Connector and Brake Controller on a 2001 Toyota Highlander
    In order to install a 7-Way trailer connector on your 2001 Toyota Highlander, you must first install a 4-Way. There is more than 1 option for you vehicle. If the vehicle came with a factory tow package, you would use # 118245, which is a replacement wiring harness. If your Highlander never came with the wiring harness or tow package, you will need to use # 118413. Installation of this harness is not difficult and I have included a link to the installation details for you. After the 4-Way...
    view full answer...
  • How to Determine Brake, Running, and Turn Signal Lights, on a 2001 Lexus RX300
    To determine which wire control the turn signals, brake lights, and running lights it is best to use a circuit tester, part # 40376, and test each wire to see what function it controls. If possible is it nice to have another person help you with this and operate the turn signals, lights, and brakes. First you must locate the vehicle wiring system. In most vehicles this can be found behind the drivers side cargo area near the tail lights, please consult your owners manual for the...
    view full answer...

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Info for this part was:

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Expert Research:
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Updated by:
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Updated by:
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