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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
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Custom Fit Vehicle Wiring

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56042 - No Converter Curt Custom Fit Vehicle Wiring
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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. Call 800-298-8924 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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Curt Custom Fit Vehicle Wiring - 56042

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

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 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   (62 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.

- 56042
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. 510339


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

55534

- 56042
by:
2018 Toyota Highlander

Worked as expected 670783



- 56042
by:
2013 Toyota Highlander

The wire harness for my 2013 Highlander fit perfectly. 642349



- 56042
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. 252073



- 56042
by:
2013 Toyota Highlander

Easily installed. 508335



- 56042
by:

Very easy to install. 850459



- 56042
by:

We couldn't recommend this product highly enough. It was SO much more affordable than having a dealership install theirs. It was very easy to install as well. My husband, who is not overly familiar with cars, installed it with ease by himself. Thank you etrailer for providing such a great product. 849188



- 56042
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. 845713



- 56042
by:
2008 Toyota Highlander

Great product easy to install, exactly what I needed. 837001



- 56042
by:

Fit form and function are great. 816138



- 56042
by:

easy plug-in wiring harness. no splicing. great product. thanks. 814694



- 56042
by:

The part came quickly, with great instructions and product description so I was able to install it quickly! 803028



- 56042
by:

Exactly what I ordered. A+ if you do not already have the other wiring for trailer lights for your suv I would suggest getting the more complete wiring pack. 799502



- 56042
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. 795125



- 56042
by:

I got it yesterday! Couldn't be happier with the turn around time. Thank you 794187



- 56042
by:

Works as described 794019



- 56042
by:

Quick delivery, order fit my needs perfectly and easy installation. 790220



- 56042
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. 786406



- 56042
by:
2015 Toyota Highlander

top notch product fast delivery great customer service! 764948



- 56042
by:

Wiring plugged right in and very easy to install. 737114



- 56042
by:

Good design and a quality product. I recommend it. 720213



- 56042
by:

Works fine. Instructions to install were clear. Price was right. Recommend highly. 706496



- 56042
by:
2017 Toyota Highlander

So easy to install! 677214



- 56042
by:

Prompt delivery of an excellent product. How-to videos on etrailer.com were the key to diagnosing the problem and making the installation easy. Keep up the fantastic work! 670910



- 56042
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! 656131


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Show More Reviews

Ask the Experts about this Curt Custom Fit Vehicle Wiring

  • How To Determine If 2019 Toyota Highlander Has A Tow Package With Converter
    The easiest way to determine if your 2019 Toyota Highlander has a towing package with a converter is to remove all of the floor coverings on the inside rear of the Highlander. You will need a trim panel removal tool part # ALL648544 or a flat head screwdriver. If you have the factory package with a converter you will already have a black box with wiring against the wall of the rear cargo area like I have pictured. If you already have the converter, the Curt T-Connector Wiring harness...
    view full answer...
  • Installing 7-Way Trailer Connector on 2019 Toyota Highlander Hybrid
    The particular parts you need to install a fully-functioning 7-Way on your 2019 Toyota Highlander Hybrid will depend on what exactly it's already equipped with. Either way you will need to start by adding a 4-Way connector harness. If your Highlander has the factory tow package I recommend the Curt T-Connector # 56042. If it does not have the tow package you will want the Curt T-Connector # C56217 instead. Both custom harnesses install by simply plugging into existing ports on the...
    view full answer...
  • How to Tell if 2019 Toyota Highlander Has Factory Tow Package
    For some reason Toyota isn't very forthcoming with how to figure out if you have the tow package or not. From my understanding all of the V6 models of the 2019 Toyota Highlander have the tow package but it isn't specified as to what else might have the tow package (or if it's even available elsewhere). If you don't have a V6 then you can try contacting your local dealer with your VIN to see if they can help you out with that or you can use a circuit tester like part # PTW2979 and test the...
    view full answer...
  • Installing 7-Way Trailer Connector so It Doesn't 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...
    view full answer...
  • Does a 2010 Toyota Highlander With Factory Tow Package Have a Converter?
    Since your 2010 Toyota Highlander has the factory towing package there will be a converter and you will only need to plug in the 4-flat wiring harness # 56042. To know if it has a converter - which will come with the factory tow package - you need to call your Toyota dealer and give them your VIN. They will be able to tell you everything that came with the vehicle, including whether or not you have the tow package.
    view full answer...
  • How To Install a 7-Way On a 2019 Toyota Highlander With No Brake Controller
    In order to install a 7-way trailer connector on a 2019 Toyota Highlander you will first want to install a 4-way trailer connector as you mentioned, the Curt T-Connector Vehicle Wiring Harness part # 56042 that you were looking at is a plug-in-play fit. I have attached an install video for you. The Adapter 4 Pole to 7 Pole and 4 Pole part # C57674 can then be used to convert the 4-way to a 7-way. That said, if you only need the tail, brake, and turn signal circuits you just wouldn't attach...
    view full answer...
  • Recommendations to Add 7-Way and Trailer Brake Controller to 2018 Toyota Highlander
    If there is not already a 4-Way connector installed at the rear of your 2018 Toyota Highlander, you will need to start with the Curt T-Connector Vehicle Wiring Harness # 56042. This custom harness will plug right into the factory port located behind the driver's-side interior trim panel in the rear cargo area of your Highlander. This is a simple "plug-and-play" installation. I have attached an installation video that you can use for reference. Then, with the 4-Way installed (or...
    view full answer...
  • Trailer Wiring Harness For 2020 Toyota Highlander
    I do have an option for you but the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package part # 56042 only fits a 2008-2019 Toyota Highlander. There is not a custom fit wiring harness yet for the 2020 Toyota Highlander. I recommend to use the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit part # 119250KIT which is not a custom fit option but is designed to clamp onto the factory wiring instead of cutting the wiring to install...
    view full answer...
  • 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...
  • 4-Way Wiring Harness Recommendation for a 2016 Toyota Highlander LE Plus With Factory Tow Package
    It sounds like your 2016 Toyota Highlander LE Plus AWD came with the tow prep package, if so then you will have a OEM port that the Curt # 56042 connector will plug directly into to provide you with a 4-way at the rear of your vehicle. According to my information the location of that plug in connector will be inside the vehicle in the center under the driver side sub-floor cargo bin in the trunk. You have to take the bin out and you will see a 4 pin square plug, you plug the 4 flat...
    view full answer...
  • Trailer Wiring Harness Recommendation for 2017 Toyota Highlander
    It's very possible that your 2017 Toyota Highlander did not come with the needed converter to activate the trailer wiring like the part # 56042 that you referenced. So instead you'd need the trailer wiring harness part # C56217 and you'd be set.
    view full answer...
  • 7-Way Trailer Wiring Recommendation for 2012 Toyota Highlander
    You will need to start with a 4-way (if you do not have one). For that you would want the # 56042. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy P2 Brake...
    view full answer...
  • Best Trailer Wiring Harness for a 2014 Toyota Highlander with or without Factory Tow Package
    The easiest way to determine the wiring harness you will need for your 2014 Toyota Highlander is to have the dealer run the VIN. They can tell you if it is equipped with the factory tow package or not. If it is then you would need # 56042. If it does not have the factory tow package use # 118449. You might be able to test the factory connection point at home to determine if it is functional or not. You would need a circuit tester such as # ALL640595 or a multimeter such as # BTMT15....
    view full answer...
  • Location of Trailer Connector on 2014 Toyota Highlander with Tow Prep 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. You may have to remove the trim panels to find it. I have made a diagram of the areas you should check for the OEM wiring connection point. If the connection is not there, I recommend using the Tow Ready Custom Fit Vehicle Wiring for the Toyota Highlander, 2014 # 119147KIT which will allow you to splice into the OEM wiring in the back of the tail lights. I...
    view full answer...
  • 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 # 119147KIT 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...
    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 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....
    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...
    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...
  • 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...
    view full answer...
  • Recommended Wiring Harness for 2017 Toyota Highlander with Factory Tow Package
    If your 2017 Toyota Highlander does indeed have the factory tow package, I recommend the Curt T-Connector Vehicle Wiring Harness # 56042. This will easily install a 4-Way trailer connector by connecting to the existing port located behind the driver's side interior trim panel in the rear cargo area. If your Highlander has the tow package, this means it already has a built-in converter under the dash, so the converter box is not needed. If you are at all unsure, you can always visit...
    view full answer...
  • 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...
  • 2010 Toyota Highlander Hybrid 7-Way Trailer Connector for Charging Trailer Battery
    Since you need to charge a trailer battery you are correct that you need to install a 7-way at the rear of your 2010 Toyota Highlander. Since you have the correct connector for the part # 56042 to install you will need to use it as the base for your wiring. From there you will adapt it to a 7-way with the part # 37185. You will plug the 4-ways in together and then to complete the charge wire you would need to run the black wire of the adapter up to the positive post of the vehicle battery...
    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...
  • Troubleshooting Curt T-Connector # 56042 on a 2017 Toyota Highlander
    The first thing that you want to do is troubleshoot the Curt T-Connector 4-Way # 56042 itself. You can do this with a circuit tester like part # PTW2979. If you are getting signals then that means you likely have a short or damaged wiring on your trailer. If you don't get signals then you either need some fuses or relays on your 2017 Toyota Highlander. There could be wiring damage on your Highlander but I doubt it since the vehicle is so new. If the problem is on your trailer side check...
    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...
  • Best Trailer Wiring Harness for 2013 Toyota Highlander with or without Factory Tow Package
    As long as your 2013 Toyota Highlander came with the factory tow package you can use the Curt wiring harness # 56042. Models without the factory tow package would need to use # 118449 or # C56217.
    view full answer...
  • 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...




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Info for this part was:

Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Test Fit:
Nicholas E
Test Fit:
Randy B
Test Fit:
Shane H
Test Fit:
Robert C
Test Fit:
David F
Test Fit:
Clayton O
Video Edited:
Jacob T
Video Edited:
Dustin K
Video Edited:
Chris R
Updated by:
Adele M
Updated by:
Sarah W
Updated by:
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Updated by:
Isabelle B
Video by:
Andrew L
Video by:
Zach D
Video by:
Michael B
Installed by:
Cole B

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