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  1. Custom Fit Vehicle Wiring
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  4. Custom Fit
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Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
CURT

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

Part Number: 56042
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$15.94
Retail:$29.15
You Save: 45%
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. 1-800-940-8924 to order CURT custom fit vehicle wiring part number 56042 or order online at etrailer.com. Free expert support on all CURT products. Great prices 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 (156)
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CURT Custom Fit Vehicle Wiring - 56042

  • 4 Flat
  • Custom Fit
  • Trailer Hitch Wiring
  • 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:  4.7 out of 5 stars   (156 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:

When I received the hitch, it was halfway out of the box. I tried to install the hitch myself and could have if the hitch had not been bent. Had to take it to a local U-Haul and pay $[XX] to bend back and install. Should have just gone there first. Would have saved time and effort. The wiring harness didn’t work as well so I had to pay another $[XX] for them to fix that.



by:

It does not work on my trailer. My son installed it so I know it was done correctly... but it doesn't work on my trailer.



by:

We installed it on our 2017 Toyota Highlander Hybrid and it was so easy. Thanks for saving us hundreds over what the dealer wanted to do it! Took us about 10 minutes, following the video instruction was a breeze.



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:
2012 Toyota Highlander

Part was exactly what I needed. Shipped quickly. I will order from etrailer again for sure!



by:

I appreciate the easy ordering process and fast shipping! The harness works perfectly:)



by:

Everything was great start to finish



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.

Anna profile picture

Anna

5/20/2019

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.



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.

Anna profile picture

Anna

5/20/2019

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.



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.

Jenny N. profile picture
Etrailer Expert

Jenny N.

10/27/2021

It sounds like your 2012 Toyota Highlander didnt come with the factory tow package and that you would have needed part # C56217. It includes the additional wiring component that installs under the dash to complete towing circuit.



by:

It’s perfect and just what i needed. And super quick delivery on it.



by:

Excellent service. Quick arrival of products. Installed after watching their videos and one was very helpful since I was having a problem and the video showed me the correct way . Highly recommend the products and video search and the instruction.



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:

Great service



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:
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:
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:
2014 Toyota Highlander

Item was as described and easy to install, thanks to the detailed instructions- written and video.



by:

Fit prefect.



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:
2008 Toyota Highlander

Easy install, but I didn't want to leave it in the cargo compartment. There was a rubber plug right there in the well with the pigtail - just cut a slice half-way cut through the plug, put the wire in the cut, then fed out for zip to the new hitch..



by:

My 2011 Toyota Highlander Limited already had the main vehicle wiring harness installed. The white connector simply plugged right into the harness under the Driver side rear compartment storage bin. It took less than two minutes to plug it in. Worked as advertised.



by:

I bought the trailer hitch and required parts for my husband for Christmas. I had them install this week. All necessary parts were included and the dealership had no difficulty with the installation. Thank you.



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.

Tk profile picture

Tk

6/13/2022

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.



by:
2017 Toyota Highlander

Perfect fit with the 2017 Highlander. Simple installation.

Brian profile picture

Brian

12/1/2018

I am thrilled with the hitch and wiring. They have both performed flawlessly. Thanks for the follow up.


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Show More Reviews

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

  • How To Tell If 2016 Toyota Highlander Has Factory Tow Package Wiring
    I cannot say for sure how you can tell whether or not you have the converter on your Highlander but I can help you out with the trailer harness installation. The only sure way to tell which harness you need is to check out what wiring you have in the rear cargo area. If you watch the attached videos you can see where the installation differs. If you remove the back tray in the rear cargo area of your Highlander you can see if there are two connectors, one being bigger than the other....
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    To add a brake controller to your 2010 Highlander you will need a 4-way, 7-way upgrade kit, and the brake controller itself. I recommend the following: -T-One Vehicle Wiring Harness # 118449 (If you do not have the factory tow package) -Curt T-Connector Vehicle Wiring Harness # 56042 (If you have factory tow package) -Universal Installation Kit for Trailer Brake Controller # ETBC7 -Redarc Tow-Pro Liberty Brake Controller # RED52VR -Mounting Panel for Redarc Tow-Pro Trailer Brake Controller...
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  • Trailer Wiring Harness for a 2012 Toyota Highlander with Factory Towing Prep Package
    If your 2012 Toyota Highlander came with the factory towing package then it should already have a trailer connector. But if there isn't one you can use either a hardwire harness such as # C59236 or the plug in style # 118449. The plug in style is much easier to install. I have linked its instructions and a video showing installation on a 2012 Highlander. I have also included a link to the hitches available for your Highlander if you have not decided on one. The most popular is Curt hitch...
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  • Will Curt Trailer Hitch Receiver 13394 Allow for Full Size Spare on 2018 Toyota Highlander
    The Curt Trailer Hitch Receiver # C13394 will fit with a full size spare tire stowed under vehicle unless the spare is on an aluminum rim, which is too wide. If you're concerned about the fit of the hitch with your spare tire I recommend the Draw-Tite Max-Frame Trailer Hitch Receiver # DT84MR which doesn't have this restriction. The Draw-Tite is also a Class III hitch with a 2" receiver. It has the same gross towing weight of 5,000 lbs and max tongue weight of 500 lbs. It also comes with...
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  • Installing 7-Way Trailer Connector so It Doesnt Get Destroyed Backing out the Driveway
    Here's what I'd recommend. If you have an exposed portion of the hitch crossbar to work with, use the # 18136 no drill bracket. This fastens to the hitch crossbar using an included pipe clamp. You'll also use the # PK12711U 7-way mounting bracket. I'd begin by mounting the trailer connector to the # PK12711U, so that the mounting flange is at the bottom. Then, attach that to the # 18136 but just leave it finger tight for the moment. Put the # 18136 up against the underside of the hitch...
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  • 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....
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  • Trailer Wiring Harness Needed to Add 7-Way Connector to 2019 Toyota Highlander
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  • Is Trailer Wiring Included With A Trailer Hitch For A 2017 Toyota Highlander SE
    Hi Nhia, The etrailer Trailer Hitch Receiver # e98844 is not going to come with trailer wiring so you will need to purchase it separately. For your 2017 Highlander SE I recommend the Curt # 56042 if you have the factory tow package; for non-tow package models you'll need the Tekonsha # 118449 instead. If you plan on towing a trailer with electric brakes then you'll need to go with the Tekonsha # 22119 instead for a 7-way and would also need a brake controller.
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    According to my research, the Toyota Highlander doesn't have the connector under the dash to install a brake controller. In order to install your brake controller, you'll need to hardwire the controller using our Brake Controller Installation Kit, part # ETBC7. The kit contains everything needed to install a brake controller, except for the brake controller itself. The Tekonsha P3, part # 90195 would be an excellent choice. The controls and display are very user-friendly, which makes it...
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  • Installation Procedure for Draw-Tite 75896 Trailer Hitch on 2015 Toyota Highlander
    We do indeed have a video showing the installation of the Draw-Tite # DT65MR Class IV hitch on your 2015 Highlander, I've linked you to the install video as well as the installation instructions and an FAQ article with all kinds of installation tips that I hope you'll find helpful. I've looked over the installation instructions, and they seem pretty simple and straightforward. You'll remove some existing appearance panels if they're present, remove the tow hooks from the frame rail, as...
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  • Recommended Hitch and Wiring Harness for a 2017 Toyota Highlander
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  • What Hitch and Wiring do You Recommend for a 2019 Toyota Highlander?
    For a great hitch for your 2019 Toyota Highlander, I recommend the Curt Trailer Hitch Receiver - Class III - 2" # C13394. This hitch comes with the hidden design you are looking for that conceals any bulky crosstubes. It also has a great ground clearance height of 15 inches from the ground, so you do not need to worry about scraping or bottoming out. Compared to our other hitches, the Curt is the best because it comes with a superior gloss outer coat over the base powder coat to provide...
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  • Recommended Trailer Wiring Harness For A 2019 Toyota Highlander Without Factory Tow Package
    You will need to contact our customer service department to return the wiring that you already purchased, we do not sell just the converter alone. You will need to purchase the T-One Vehicle Wiring Harness # 118449 for your 2019 Toyota Highlander. I like this harness over the others that we offer because it has a more reliable powered converter box than the other harnesses that we offer. I linked an installation video below on the T-One Harness being installed onto your exact vehicle....
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    Here's what you'll want to do to easily determine if your 2015 Toyota Highlander has the factory converter for trailer wiring. Check out the install video link I attached and fast forward to the 4:00 minute mark. This is the portion of the install video for the # C56217 that covers installing the needed fuse to activate the converter box of the kit. If your Highlander already has a fuse in the shows slot you have the converter already and all you'd need is the # 56042 for trailer wiring....
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  • Recommendations to Add 7-Way and Trailer Brake Controller to 2018 Toyota Highlander
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  • 4-Pole Trailer Wiring Harness for 2016 Toyota Highlander with Factory-Installed Tow Package
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  • Adding a 5-Way Flat Trailer Connector to a 2017 Toyota Highlander Limited with Tow Package
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  • Can Weight Distribution System Increase Towing Capacities on a 2016 Toyota Highlander AWD
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  • How to Pick Out Trailer Wiring for 2019 Toyota Highlander
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    view full answer...
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