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  1. Custom Fit Vehicle Wiring
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  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

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

Item # 56042
Retail:$33.03
Our Price: $29.00
You Save: 12%
Custom Fit Vehicle Wiring

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Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector No Converter 56042
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required. 1-800-496-5010 to order CURT custom fit vehicle wiring part number 56042 or order online at etrailer.com. Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Curt T-Connector 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 (113)
  • Q & A (0)
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  • Why etrailer?

CURT Custom Fit Vehicle Wiring - 56042

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

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. 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 in rear cargo area
    • Plug in connector
  • Comes with dust cap for 4-way flat connector
  • Limited 1-year warranty


Installation

This custom-fit T-connector plugs into your vehicle's factory tow package wiring harness, which is located behind the driver's-side interior trim panel in your rear cargo area.


Once installation is complete, the 4-way 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 plug on your automobile and the 4-pole connector itself - to help prevent corrosion.



56042 CURT T-Connector - OE Replacement 4-Flat

Installation Details 56042 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - 56042

Average Customer Rating:  4.8 out of 5 stars   (113 Customer Reviews)

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

by:

Was easy to install. The original was broken from someone hitting it. The replacement is not mounted on the outside but left in the storage space until needed.


Comments
Still working. I installed it and store in the area under the back mat. I believe thats the best because its not exposed to the weather. Id buy it again if needed as I saved a ton of $$ by doing it myself.
TK - 06/13/2022


by:
2012 Toyota Highlander

Great product, as usual, from etrailer. First what it should add described.


Comments
A year later and its working great like day one of its installation. Quality wiring that fit my 2012 Toyota Highlander flawlessly.
Gerald - 05/29/2022


by:
Toyota Highlander

Just a heads up for Toyota Highlander owners. My Highlander had the towing package from the factory but I still needed the converter and wiring harness combo etrailer package.




by:
2011 Toyota Highlander

No complaints fit 2011 Highlander perfe ctly




by:

2012 highlander had factory tow package. This harness mounted in fine to the factory plug in the back but there was no power at the connector. After some research I found that I still needed to go to the dealer and purchase a $100 towing converter that plugs in under the dash on the left side.


Comments
It sounds like your 2012 Toyota Highlander didnt come with the factory tow package and that you would have needed part # C56217
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
$37.94
. It includes the additional wiring component that installs under the dash to complete towing circuit.
-- Etrailer Expert Jenny N - 10/27/2021


by:

This t-Connector was exactly what I needed so I didn't need to make an extra trip.




by:

Worked great on my Highlander.


Comments
Ive sold the car but it was still working great when I sold it.
Michael - 03/09/2022


by:
Toyota Highlander

After balking at the cost to have an auto-shop add a trailer to our Toyota Highlander, we found etrailer.com and decided to take a chance. The "how to" videos factored considerably in our decision to buy ... they made it look so easy! And surprise! It really -WAS- that easy. We used standard block-type ramps (the kind you can buy for $40 ) to get the SUV up off the ground high enough to get underneath to do the work. Everything came off as easy as it was showed in the videos. Other than the fact this bar is a heavy so we had our teen daughter help hold it steady while we bolted it into place (i.e., get help for when you go to lift it), it went super smooth. Thanks for saving us $280 over the cost the car dealer quoted us! P.S. - be sure to watch the linked videos so you get the right trailer lighting attachment and ball hitch for your new hitch.


Comments
We are very happy with our trailer hitch, and all the accoutrements that we purchased with it. Your videos were enormously helpful, the hitch went on easily with a bit of help from our teenage daughter to lift it up into place, and we recommend your business to friends when they express an interest in getting a camper.
Anna - 05/20/2019


by:

Etrailer lived up to their word keeping their promise to give a $10. credit to us for paint. Delivery was fast and prices were better than others. Hitch fit like a glove with no issues.




by:

The quality of the hitch exceeded my expectations. The service and speed of etrailer was amazing. I personally recommend etrailer.com




by:
1999 Jayco Designer

This wiring harness was a huge time-saver over wiring things manually like we did for our last trailer hitch a long-long-long time ago! If you're not sure what to buy, watch the videos they have to make sure you get the correct one for your needs. We saved a HUGE amount of money over what the auto dealer quoted us for the exact same thing, and as a bonus, the how-to videos made it really easy to attach it ourselves. Yes, it really -is- that easy.


Comments
We are very happy with our trailer hitch, and all the accoutrements that we purchased with it. Your videos were enormously helpful, the hitch went on easily with a bit of help from our teenage daughter to lift it up into place, and we recommend your business to friends when they express an interest in getting a camper.
Anna - 05/20/2019


by:

Easy install. Works great.




by:
2017 Toyota Highlander

My order got here on the scheduled date. My vehicle already has the plug, so it took all of about 5 minutes to install. I have not had a chance to verify it electrically though. I will do this soon.




by:
2015 Toyota Highlander

Great ordering and quick delivery. Product was just as described and super easy to install. Just a little disapoited in the wireharness that was available as it does not have a bracket to clamp to the hitch and will need to be replpaced. Make sure to order the correct one.




by:

I always get great support and excellent customer service! Website is easy to understand and products are exactly as described!
Excellent company!




by:
2012 Toyota Highlander

***READ THIS*** Great product, easy install *BUT* This might help someone else. I called the dealer and found that my 2012 Toyota Highlander has the " V-6 Towing Prep Package" I had assumed that was the factory towing package, I was wrong. Save yourself the trouble and physically look under the dash for the white connector as well, if nothing (no converter) is plugged into it, you will need the other wiring kit with the converter. [one of etrailer.com videos] clearly shows the connector I'm talking about on a 2012 Highlander I have now ordered the correct part. I am still very happy doing business with etrailer.com Thanks!




by:

Nice kit. Easy install.




by:

Don't buy from car dealer, this is the same connector for a lot better price, and I didn't have to sport a face diaper to get it. etrailers is the best source out there. I recommend them all the time.




by:
2008 Toyota Highlander

parts arrived ahead of schedule and in good order. Had it installed locally by a professional and am very pleased with the results, thank you! Order included: Draw Tite hitch receiver / tongue kit with 2 drop/raise sizes & 2 ball sizes / wiring, wire tester / for 2008 Highlander.




by:

Perfect for what I needed, and best price around.




by:

The part came quickly, with great instructions and product description so I was able to install it quickly!


Comments
Still working well!
Jeffrey J - 05/25/2021


by:

Delivered same week. Package was torn, but etrailer had taped all small parts to the receiver hitch so no small parts were lost. And those parts fit perfectly.




by:
2019 Toyota Highlander

Very pleased with the trailer hitch. Very easy installation and directions were excellent. I would recommend it to anyone who is looking for a after market hitch.The wire harness worked like a champ.The whole job looks great.




by:

The product is amazing. I will say that the company that installed the hitch did not hook the lights up correctly and they trailer lights still do not work. It has nothing to do with the product. I am hoping that I will be able to take it back and get it fixed next week.




by:
2017 Toyota Highlander

The order was put in right away and shipped quickly. The box was a little damaged but item seem okay inside. I didn't install it yet so will have to update review with picture at a later date.



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Show More Reviews

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

  • Trailer Wiring Harness Recommendation 2012 Toyota Highlander with VIN That Indicates Tow Package
    Yes, what you found by giving your VIN to a Toyota dealer is the relevant info for picking out trailer wiring. So that means the Curt trailer wiring kit part # 56042 would be all that you'd need to have a 4-way. This easily plugs into a port at the rear of your vehicle and you'd be set. I attached an install video for this kit for you to check out as well.
    view full answer...
  • Wiring Harness For 2012 Toyota Highlander With Tow Prep Package
    Since your 2012 Toyota Highlander has a tow prep package you will need Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # 56042 which plugs into the vehicle's factory tow package wiring harness behind driver's side trim panel in the rear cargo area. I recommend to watch the linked video for installation details including where the factory wiring harness is hidden.
    view full answer...
    Image 1 for
  • Troubleshooting a Trailer Wiring Harness # 56042 Install on a 2014 Toyota Highlander
    The 4 pin connector used to install the # 56042 can be in a few locations which does make the install a little more interesting. I am glad you were able to find it. I would verify that you put the fuse in the correct location. If that doesn't fix the problem I would verify that the connector of the # 56042 is making solid connection with you tow vehicle and that the fuse didn't blow while in the wrong slot. I attached an install video that shows a very similar product being installed...
    view full answer...
  • Connector Location for the Curt Wiring Harness part # 56042 on a 2014 Toyota Highlander
    I am glad you were able to find the location for the connector of the part # 56042 on your 2014 Toyota Highlander. The connector can be in a few locations so we appreciate you letting us know where you were able to find it on yours.
    view full answer...
  • Availability of a Trailer Wiring Harness for a 2014 Toyota Highlander with OEM Tow Package
    The Curt T-Connector Vehicle Wiring Harness, # 56042, is the confirmed wiring harness for the 2010 Toyota Highlander with factory tow package installed. The factory tow package will include a power converter that would have been installed under the dash at the factory. You will not need to install a converter to your model Highlander. The connecting point for the wiring harness will be located on the driver's side rear behind the interior panel in the cargo area. The attached photo...
    view full answer...
    Image 1 for
  • Vehicle Towing Capacity and Trailer Weight Compatibility
    The GVWR spec for a trailer, its gross vehicle weight rating, is the most it can ever weigh. This 3800-lb figure for your Coleman travel trailer includes the trailer's own dry weight of 2715-lbs plus the weight of water, propane, food, sporting gear -everything that goes in the trailer. You do NOT need to add the trailer's tongue weight (TW) to this figure. If you subtract the dry weight of 2715-lbs from the gross weight of 3800-lbs you get the maximum total cargo weight, 1085-lbs. This...
    view full answer...
  • 4-Pole Trailer Wiring Harness for 2010 Toyota Highlander
    To add a 4-pole flat type trailer wiring harness to a 2010 Toyota Highlander with the factory tow package all you need is part # 56042 from Curt. Highlanders equipped like yours with the tow package will have a converter under the dash. The Curt simply plugs in for installation. That's it. Please refer to the linked videos. This harness delivers stop, turn and tail lights to your connected trailer.
    view full answer...
  • How To Determine if the 2019 Toyota Highlander Has A Tow Package For Trailer Wiring
    The big difference for trailer wiring for the 2019 Toyota Highlander in regards to the tow package is whether or not there is a converter box at the rear of the vehicle under the trim panels. If you take a look at the video for part # 118449 that I attached on a 2018 Toyota Highlander without a tow package he removes the back tray in the rear cargo area to find the plugs he needs to plug the wiring harness into. If you remove the cargo area tray and you have two plugs (one for a converter...
    view full answer...
    Image 1 for Image 2 for
  • How To Determine If A 2019 Toyota Highlander Has A Tow Package
    I am happy to help you determine if your 2019 Toyota Highlander has a tow package or not. The easiest way is to visually inspect your vehicle on your own. If you take a look at the video for part # 118449 that I attached on a 2019 Toyota Highlander without a tow package, the installer removes the back tray in the rear cargo area to find the plugs he needs to plug the wiring harness into. If you remove the cargo area tray and you have two plugs (one for a converter and one for the wiring...
    view full answer...
    Image 1 for Image 2 for
  • Does My 2019 Toyota Highlander Hybrid Have A Tow Package Or Not
    I am happy to help you determine if your 2019 Toyota Highlander Hybrid has a tow package or not. I understand that the photo you are referring to can be hard to interpret. The easiest way to determine this is to visually inspect your vehicle on your own. If you take a look at the video for part # 118449 that I attached on a 2019 Toyota Highlander without a tow package, the installer removes the back tray in the rear cargo area to find the plugs he needs to plug the wiring harness into....
    view full answer...
  • How to Determine if 2019 Toyota Highlander Has Factory Tow Package for Wiring Harness
    There are a couple ways you can determine whether or not your 2019 Toyota Highlander is equipped with the factory tow package. The first method consists of simply looking for the plug(s) that the appropriate trailer harness would connect to; either the Tekonsha T-One # 118449 if you don't have the tow package or the Curt T-Connector # 56042 if you do. With regards to wiring the tow package essentially provides the needed converter box, so it's not included/needed with the Curt harness....
    view full answer...
  • Replacement 4-way Connector For 2018 Toyota Highlander With Aftermarket T-One Connector Installed
    Since the 4-way connector plugs into the factory wiring via a 4-pin connector and not into the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118449 you have installed on your 2018 Toyota Highlander, the Curt T-Connector Vehicle Wiring Harness # 56042 will work just fine as a replacement. I included videos of the products mentioned for you to take a look at.
    view full answer...
  • Recommendations Wiring Harness 2009 Toyota Highlander
    We have two very good options for your 2009 Toyota Highlander. If your vehicle is equipped with factory tow package I recommend the Curt T-Connector harness for factory tow package, # 56042. If not, then I recommend the Tekonsha T-One harness # 118449 for its improved weather sealing, especially since you identified primarily towing a boat.
    view full answer...
  • Recommended Trailer Wiring Harness for 2018 Toyota Highlander XLE
    You should be able to call your local Toyota Dealer with your VIN number to determine if you have the factory tow package or not. It is likely you do with the transmission cooler, but there are times they include one and not the other. If you have the factory tow package with the converter under your dash, you will simply need the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # 56042 for your trailer wiring. If you do not have the...
    view full answer...
  • What is Towing Capacity for 2018 Toyota Highlander Limited
    I did some checking and it looks like your 2018 Toyota Highlander Limited has a towing capacity of 5,000 lbs so a 1,900 lb trailer wouldn't be a problem at all. Since your vehicle has the towing package you most likely have trailer wiring already, but in case you do not we have the Curt 4-way part # 56042 which is a confirmed fit. Since you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch...
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  • Trailer Wiring Recommendation for 2017 and 2008 Toyota Highlander
    For your 2017 Toyota Highlander the correct 4-way harness for your vehicle since it has the tow package is the part # 56042. To convert to a 5-way you would need # 47515. For your 2008 the same # 56042 is a confirmed fit as well.
    view full answer...
  • Recommended Trailer Wiring For 2016 Toyota Highlander
    On your 2016 Toyota Highlander, there are two possibilities from the factory regarding wiring. One possibility is that your vehicle came with the tow package and has all the trailer wiring you need already in place. The other possibility is that there are wires run for quick connects and you just need to add the wiring and the converter box. If you need the wiring and converter, I recommend the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118449. This harness...
    view full answer...
  • 4-Pole Trailer Wiring Harness for 2016 Toyota Highlander with Factory-Installed Tow Package
    For your 2016 Toyota Highlander with factory tow package the 4-pole wiring harness you can use is Curt part # 56042. This uses a square connector (shown in the linked photo) that plugs in at the rear cargo area. The connection point is located behind the driver's-side interior trim panel. The linked instructions include color photos to help you locate the mating plug.
    view full answer...
    Image 1 for
  • Why Would Trailer Wiring Harness in 2008 Toyota Highlander Stop Working
    If you had the part # 118449 installed in your 2008 Toyota Highlander that would indicate that you do not have the factory tow package. This harness comes with a converter box built into it so I am not sure how you would have actually had this harness installed if you don't have a converter box. If instead what you have looks more like the part # 56042 then you do not have the # 118449 installed. The part # 118449 has an inline fuse on it for the power wire that connects right the port...
    view full answer...
  • Troubleshooting Trailer Lights Not Working with New Wiring Harness on 2011 Toyota Highlander
    Glad to hear that you were able to easily install the Curt Trailer Hitch Receiver # 13534. I will be happy to help you troubleshoot the Curt T-Connector # 56042 for your 2011 Toyota Highlander. Since you do have the factory tow package on your Highlander the only thing that I can think of is that you either have a bad fuse or no fuse at all for the trailer lights. I took a look at the online version of the owner's manual for your vehicle and found that the fuse for the trailer lights is...
    view full answer...
    Image 1 for
  • Is Trailer Wiring Harness T-One 118449 a Fit for 2018 Toyota Highlander Hybrid
    For trailer wiring, there is not a difference between the hybrid and non-hybrid model for your 2018 Highlander. The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118449 is the correct fit for all styles of Highlander including the Hybrid. I've attached a video of the installation to assist. If you have the tow package then there is already a converter under the dash and you would simply need the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole...
    view full answer...
  • 4-Pole Trailer Wiring Harness for 2015 Toyota Highlander
    The best way to confirm exactly what factory equipment has been installed in your vehicle is to contact your local dealership with the vehicle VIN. This allows the dealer to look up all of the production details for that specific vehicle. This is the best way to go since exactly what individual items constitute a "trailer towing package" are NOT standardized and could vary considerably. Some auto makers' tow package may mean a hitch only; or it could mean a hitch and wiring; or a hitch...
    view full answer...
  • Recommended Wiring Harness for 2017 Toyota Highlander
    If your 2017 Toyota Highlander came with the factory tow package, you will have a converter under the dash. If the vehicle came with a factory 7-Way connector and a trailer hitch, it likely has the tow package. If it did not come with a 7-Way and trailer hitch, then most likely it does not have the tow package or the converter under the dash. The most accurate way to determine what your Highlander came equipped with is to simply visit your local Toyota dealer with your VIN. They will...
    view full answer...
  • Trailer Wiring Solution for 2015 Toyota Highlander without Factory Wiring
    Sounds like your vehicle is still missing the middle section of wiring for trailer wiring. The only option we have would be for you to order the part # 118449 which includes the converter section you are in need of plus the 4-way harness you already have.
    view full answer...


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