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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 # TK74FR
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Custom Fit Vehicle 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 TK74FR 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 (118)
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Tekonsha Custom Fit Vehicle Wiring - TK74FR

  • Trailer Hitch Wiring
  • 4 Flat
  • Powered 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 behind the rear bumper, on the driver's side.


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



118292 Tow Ready T-1 T-Connector - 4 Wire

Installation Details TK74FR Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - TK74FR

Average Customer Rating:  4.8 out of 5 stars   (118 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:

It is made clear that this harness is for a vehicle equipped with the factory tow package. What is not clear is that if you have the harness plug on your vehicle, that is not indicative of having a tow package. Granted there are other components that would be obvious that a tow package is present, but it seems logical that if the connection is present, it should work. In order for the trailer lights to work, you need a converter box. Some sites show it as a 4/7-way pug adapter, but the picture is wrong, keep checking other sites to see the actual device. Also, there are plenty of forums that discuss this problem. The converter powers up the harness and the connection will work. The converter, which is simple to install, is about $xx from [dealership]. The kit supplied by etrailer is way more involved than the factory converter. Just be aware that the presence of the factory plug itself is not indicative of having a tow package.


Comments
You are correct, if you do not have the factory tow package, then you will need to have a converter box for the installation. There have been instances where the Toyota Highlander does have plugs that will fit but are not activated. When this happens, it means that you actually would need to activate the tow package with a fuse. In order to get that confirmation, you can contact a Toyota dealership to find out. If you do not have the tow package then you would need part # TK99FR
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
$78.59
.
-- Etrailer Expert Katrina B - 05/31/2022

by:
2022 Toyota Highlander

The wiring harness came with just the wires, no mounting bracket, no zip ties, and no instructions. I wish it had some sort of mounting bracket. We had to zip tie it to the hitch receiver to keep it from trailing on the ground, which looks pretty ugly. Otherwise, it works well.



by:

Easy install and fits the bracket perfectly. The receiver bracket and wiring harness make for a professional looking install.



by:
2022 Toyota Highlander

Perfect plug and play harness. Removed the factory plug cover, added a little dialectic grease and plugged in. Wire tied the excess harness to the body molding bracket, pushed the flat connector through the bracket, added some dialectic grease, and slid the coverover the plug. Simple process



by:
2022 Toyota Highlander

Install took me about 2 hours used car ramps and floor jack did by myself on a creeper this Included installing the wire harness



by:
Toyota Highlander

Easy. Check for the hookup connector under the rear of the car. My 2022 Highlander Hybrid has it, and it wasn’t spec’d out with a trailer package. Don’t forget to put in the 30 amp fuse.



by:

The service was very good.The hitch came in 2 days.It took my son in law 20 minutes to put it on.Very happy with this product.



by:

Ordered this simple trailer connector December 12. Very small part and chose to have it sent economy (=USPS). The post office was overwhelmed and providing substandard service. Thanks again 2020. I contacted trailer on Dec 21 and spoke to Danielle. I explained how I needed the part for a post Christmas need and really had expected it to have arrived already. Danielle was very professional and listened carefully. Although it was still to early to initiate a call she said she’s would follow up the 23rd. AND she did, I received an email from Danielle with a status from the postal service and some kind words assuring me that it was on the way. It did arrive on Christmas Eve as described. The review is: disappointed with the post office and highly recommend the outstanding customer service from etrailer!! And the wiring adapter is good too.



by:

I had great help from the staff, getting the wiring kit, and hitch for my rig. The tracking of the order was nice. Everything arrived in great condition. The unit was correct and fit great. I give this company a (A+).



by:
Toyota Highlander

The wire harness was a perfect fit for my 2020 Toyota Highlander gas model XLE



by:

Perfect! Exactly as described. Best to reveiw the how to install from the internet to make it go smoothly!. Great product!



by:

Would do business with these guys anytime. Super fast delivery and excellent customer service with delivery and product



by:
Toyota Highlander

I easily found the trailer plug under the rear bumper cover of my 2021 Highlander Limited. Initially I was not clear on whether I needed a converter. The answer is yes! But the converter plugs in at a different location. The converter plugs into a socket located behind the left rear interior quarter panel. There is a really good video of this on Utube. What you need is etrailer part TK99FR, which includes both the trailer wiring harness and the converter. Since I already had this wiring harness from etrailer, I used a Toyota converter (part 725-48200) that I obtained from a local dealer. Regardless of whether you use the etrailer converter or the OEM converter, it is a super easy connection to use the plug-in provided by Toyota. No splicing needed!



by:

It works it fits. I just wish the shipping was cheaper to Canada.


Comments
I plugged it into our 2020 Highlander hybrid platinum and there was no power to it I haven’t done much since probably take it to the dealer
Clifford - 03/17/2022

by:

Good but you need the inverter adapter for the factory harness if you don't have the tow package



by:
2020 Toyota Highlander

Easy to install but doesn't work. Did some additional research and maybe should have bought the TK99FR which comes with some additional adapter or something. But nowhere did it say to research this possibility before ordering. You see the TK74FR stated clearly that it would fit my vehicle. Frustrating!


Comments
Hi Maureen, Thanks for our feedback! This kit is for the 2020 Highlander with the factory tow package. For your Highlander, it sounds like you will need the T-One Vehicle Wiring Harness, part # TK99FR
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
$78.59
, for Highlanders without the factory tow package.
-- Etrailer Expert Tyler M - 06/01/2021

by:

Great fit for a fraction of the cost. Easy to install and great documentation. I recommend following the forum for lots of tips on how to DIY this.



by:

perfect. i recommend using etrailer.com



by:

Good fit and continues to work great.



by:
2020 Toyota Highlander

Excellent parts and service



by:

Bought this and a trailer hitch. Both went on very smooth thanks to their videos and sending me the right parts. packaging contained all the parts and manuals too. Shipping was VERY fast; they had it on the courier the day I ordered it.



by:
2020 Toyota Highlander

Installation was a breeze. Following the video and with the aid of a friend, the hitch slipped into place without any hassles. Used the Pig Tail I purchased with the hitch which is "plug and play". Completed the task with the purchase of the Toyota Highlander Tow Converter from a local Toyota Dealer. The Quality of the hitch speaks for itself! IMHO, the hitch looks superior to the "through the bumper" OEM assembly.



by:

Perfet fit!



by:
Toyota Highlander

Works with my factory pre-wired Highlander.
Plug
and go



by:
2021 Toyota Highlander

Easy to plug into wiring for 2021 Highlander that had wiring tow package,


25
118
Show More Reviews

Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring



  • Checking Tow Light Wiring Fuse on 2020 Toyota Highlander
    The most likely issue is a blown or missing fuse for the trailer lighting. Locate the fuse panel under the hood, on the driver's side, near the fender. Your Owner's Manual can additionally provide you a picture of the location and instructions for opening it. Locate position 15 in the panel and determine if the fuse is missing or blown. I have attached a picture showing the location of that fuse in the panel.
    view full answer...
    Image 1 for
  • How to Activate Trailer Tow Wiring Tow Package 2020 Toyota Highlander
    Typically, a vehicle manufacturer wouldn't have the plug there if it couldn't be made to work. I wasn't able to find a fuse diagram online for the 2020 Highlander (nor do they provide one in the online copy of the owner's manual I saw), but the previous gen has a 'Towing' fuse in the main box in the engine compartment that activates the tow package. The lid of the fuse box should have a label showing which fuses protect which circuits. All you'll need to do is install a fuse in that location...
    view full answer...
  • Is Flashing 2020 Toyota Highlander Required for Installing 4-Way
    Flashing is not required at all on a 2020 Toyota Highlander in order to install the T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # TK74FR.
    view full answer...
  • Troubleshooting Trailer Wiring Install for 2020 Toyota Highlander that is Not Active
    Sounds like you should have went with the Tekonsha trailer wiring harness part # TK99FR which comes with the harness of the # TK74FR but also comes with the needed converter box harness which you are missing. The converter harness is also not available separately.
    view full answer...
  • 4-Way Trailer Wiring Harness for 2022 Toyota Highlander with and without Tow Package
    For your 2022 Toyota Highlander the correct and best option for a 4-way harness is the part # TK99FR for if you do not have the tow package or the # TK74FR for if you do have the tow package. If you are not sure whether or not you have the factory tow package you'll want to reach out to the dealer but this is almost always listed on the window sticker if equipped. Please note, models without the factory tow package may still have the tow package plug but that does not mean the circuits...
    view full answer...
  • What is the Correct Wiring Harness for 2022 Toyota Highlander with Factory Tow Package.
    The correct wiring harness for your 2022Toyota Highlander with factory tow package is the T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # TK74FR. The # TK74FR is the right wiring harness since you have the factory tow package installed.
    view full answer...
  • Troubleshooting Trailer Wiring Installation for 2022 Toyota Highlander
    If you've securely connected the Tekonsha T-One Wiring # TK74FR to your 2022 Toyota Highlander but you aren't getting any power to the 4-Way then it sounds like your Highlander doesn't have the factory tow package and you needed the T-One Wiring # TK99FR instead which comes with an extra wring piece that activates the tow package wiring on your vehicle. You can double check whether your Highlander has the tow package or not by calling your local Toyota dealer with your VIN. If you don't...
    view full answer...
  • Recommended 4-Way Wiring Harness for 2022 Toyota Highlander Hybrid Platinum Without Tow Package
    For a 4-way wiring harness for your 2022 Toyota Highlander Platinum Hybrid without the tow package you need the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # TK99FR. When it comes to wiring, we have found Tekonsha to be the most reliable. This wiring harness plugs in to the connection point in the rear of your vehicle and will provide you with a 4-way connection to power your trailer's signal lights. I have attached an installation video for your reference.
    view full answer...
  • Best 4-Pole Trailer Wiring Harness for 2020 Toyota Highlander
    Because of their superior reliability, I'd recommend the # TK99FR T-One Wiring Harness from Tekonsha. As you can see by clicking the provided video and installation instruction links, the install is pretty straightforward. This is a two piece harness, with one piece being the taillight converter that plugs into the vehicle's tow package harness behind the side panel of the cargo area and the trailer connector itself plugging in under the vehicle. If the trailer connector portion should...
    view full answer...
  • Recommendation Hitch and Wiring Harness for 2022 Toyota Highlander Limited
    I recommend the Class III Curt Trailer Hitch Receiver, # C99FR with a 2" x 2" receiver opening. This fits all trim levels and bolts onto your Toyota Highlander's frame with no welding required. A complete hardware kit and installation instructions are included. For a 2022 Toyota Highlander Limited listed as With Factory Tow Package, I suggest the T-One Vehicle Wiring Harness for Factory Tow Package, # TK74FR. If listed as Without Factory Tow Package, I suggest the T-One Vehicle Wiring...
    view full answer...
  • What Hitch and 4-Way Wiring Harness do You Recommend for My 2022 Toyota Highlander?
    For your 2022 Toyota Highlander, I recommend the Curt Trailer Hitch Receiver - Custom Fit - 2" # C99FR. Not only does the Curt provide you with 500 pounds of gross tongue weight and 5,000 pounds of maximum gross towing weight, it also comes with a superior outer gloss coating over the base coat to give you maximum rust and corrosion resistance. This model is manufactured in the U.S.A. and fits both XSE an non-XSE models. For the 4-way wiring harness, you need the T-One Vehicle Wiring...
    view full answer...
  • Trailer Hitch Receiver Fit For 2021 Toyota Highlander XSE
    I can help you out with the correct trailer hitch fit for your 2021 Toyota Highlander XSE; I do understand the confusion as well, because the page states "excluding XSE" and underneath it states "XSE models". What that means is that the hitch fits both the XSE and non-XSE models of 2021 Highlander. So for your 2021 Toyota Highlander XSE, I can confirm for you the correct fit for a trailer hitch is from Curt: - Curt Trailer Hitch Receiver # C99FR I have added a customer review for you...
    view full answer...
    Image 1 for
  • Recommended Trailer Wiring Harness for 2021 Toyota Highlander
    The Draw-Tite # DT84MR Class III hitch and the trailer wiring harness are sold separately, because not everyone uses a hitch for towing, some folks use them as an attachment point for hitch mounted accessories like bike racks or cargo carriers. The # DT84MR fits all models of the 2021 Toyota Highlander with the exception of XSE models. For a wiring harness, I'd recommend # TK74FR for vehicles with the tow package or # TK99FR for vehicles NOT equipped with the tow package. I've linked...
    view full answer...
  • Correct Trailer Wiring Harness for a 2021 Toyota Highlander With or Without Tow Package
    The correct trailer wiring harness for a 2021 Toyota Highlander without factory tow package is the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # TK99FR which plugs in behind the taillights. The correct trailer wiring harness for a 20021 Toyota Highlander with factory tow package is the T-One Vehicle Wiring Harness part # TK74FR which plugs into the tow package port. If you are not sure whether or not you have the factory tow package you'll want to reach out to the...
    view full answer...
  • Recommended 4-Way Wiring Harness for 2022 Toyota Highlander Hybrid Platinum
    There are different options for a wiring harness on your 2022 Toyota Highlander Hybrid Platinum depending on whether or not you have the factory tow package. If you do have the factory tow package then you can use the T-One Vehicle Wiring Harness # TK74FR. This will plug into the tow package wiring harness at the rear of your vehicle. If you do not have the factory tow package, you need the Tekonsha T-One Vehicle Wiring Harness # TK99FR instead. Another possible option would be to add...
    view full answer...
  • Recommended Trailer Hitch and 5-Way Wiring Harness for a 2022 Toyota Highlander
    I recommend the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C99FR. It has a 5,000 pound gross trailer weight limit and a 500 pound max tongue weight. No drilling custom fit install takes about an hour on average. You can add the T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # TK74FR as a plug in play wire harness then use the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 to upgrade it to a 5-way flat.
    view full answer...
  • Recommended Made In America Trailer Hitch Receiver For 2020 Toyota Highlander Hybrid Platinum AWD
    Absolutely! For your 2020 Toyota Highlander Hybrid Platinum AWD I recommend the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C99FR which is made in the USA, and will be perfect for carrying a bike rack, a cargo carrier or even towing a trailer due to the 500lb tongue weight rating and 5000lb trailer weight rating. As you mentioned the # C99FR exceeds the capacities of your Highlander so you will need to use the lower rating of the vehicle, but you will have peace of mind...
    view full answer...
  • Brake Controller And Wiring For A 2022 Toyota Highlander
    For your 2022 Toyota Highlander, along with the Redarc Tow Pro Elite # RED44FR, you're also going to need a 4-flat trailer connector # TK99FR, and a 7-way trailer connector # ETBC7. If you have the factory towing package, you can use the T-One Vehicle Wiring Harness for Factory Tow Package # TK74FR which will take away any of the cutting and splicing, and will plug right into your factory harness. Now you should be able to wire the Redarc Tow Pro Elite to your 2022 Toyota Highlander.
    view full answer...
  • Recommended Hitch for 2021 Toyota Highlander Hybrid Platinum That Wont Interfere With Sensors
    For your 2021 Toyota Highlander Hybrid Platinum I recommend the Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2" # DT84MR. This hitch is the least likely to interfere with your hands-free liftgate sensor, but there is still a chance that there may be interference or possible loss of the function. There should be no interference with other sensors such as backup and parking. I was able to find a review on a 2020 and 2021 Highlander that reported the lift gate sensor...
    view full answer...
  • Recommended Wiring Harness for 2020 Toyota Highlander
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C76CR is confirmed to fit the 2020 Toyota Highlander without the factory tow package. If you have the factory tow package you need the # TK74FR T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector. The # C76CR plugs in using the t-connector behind the rear driver's and passenger's side tail lights. The # TK74FR connector plugs into the factory tow package wiring harness, located...
    view full answer...
  • Troubleshooting Tekonsha Trailer Wiring TK74FR not Active on 2021 Toyota Highlander
    The # TK74FR that fits your 2021 Toyota Highlander if it had the OEM tow package does not come with the converter box needed for vehicles with the tow package, and at this time we do not offer the box separately. But we do have a different trailer wiring solution that will work with the # C76CR which plugs in behind the taillights and comes with it's own converter box. The box might be available if you checked with Toyota directly.
    view full answer...
  • Recommended 4 Flat Trailer Wiring Harness For A 2022 Toyota Highlander With Factory Tow Package
    Knowing that your 2022 Highlander has the factory tow package is actually a huge help. This will mean your Highlander is pre-wired for a 4 Flat harness and will make everything a lot easier. The Tekonsha T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # TK74FR will plug directly into a port located behind the rear bumper on the driver's side. With this being plug and play, it will take absolutely no time to install and get you up and running. The only...
    view full answer...
  • 2020 Highlander hitch
    The Curt Class III hitch, part # C99FR is a fit for your 2020 Toyota Highlander, unless it's an XSE model. If all you'll be using the hitch for is to carry a bike rack, all you'll need is the hitch itself. If you'll also be using the hitch for towing purposes, you'll also need a trailer wiring harness like part # TK99FR for vehicles without the tow package, or # TK74FR for vehicles with the tow package. You'll also need a ball mount like # 2923 and a trailer ball like # 19261 for a 1-7/8...
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
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Employee Chris R
Video by:
Chris R
Employee Thomas T
Video by:
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Employee Wilson B
Updated by:
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Employee Alexander C
Written by:
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Employee Robert C
Test Fit:
Robert C
Employee Conner L
Test Fit:
Conner L
Employee Clayton O
Test Fit:
Clayton O

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