1. Custom Fit Vehicle Wiring
  2. Curt
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Powered Converter
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

lowest price pledge
Our Price: $60.14
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Orders above $99 qualify for Free Shipping
Shipping Weight: 0.94 lbs
Quantity: 
In Stock
Custom Fit Vehicle Wiring C56217 - Powered Converter - Curt
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connectors plug directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. Call 800-298-8924 to order Curt custom fit vehicle wiring part number C56217 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 with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (569)
  • Q & A (152)
  • Photos
  • Why etrailer?

Curt Custom Fit Vehicle Wiring

  • Custom Fit
  • Trailer Hitch Wiring
  • Curt
  • 4 Flat
  • Powered Converter

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connectors plug directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Tow harness with 4-way connector plugs into connection point in rear cargo area
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness. The connection point for the 4-way tow harness is located behind the interior trim panel in your rear cargo area. Once you've plugged in the converter, insert the included 10-amp fuse into the integrated fuse holder.


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


Powered Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.


Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.


Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.


Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.



56217 CURT T-Connector - Surface Mount Technology - 4 Wire

Replaces 56034

Item # C56217

Installation Details C56217 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56217

Average Customer Rating:  4.8 out of 5 stars   (569 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connectors plug directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.

- C56217
by:
2015 Toyota Highlander

Ordered Curt Class 3 Hitch Receiver and custom T-connector Wiring Harness for 2015 Highlander. Order dispatched immediately Monday morning. Delivery as promised Thursday. Box was pretty badly beaten up and harness had been expelled from separate clamshell packaging. Nothing appeared damaged and all parts (except for 10 amp microbus for vehicle fusebox) were present. Video instructions for installing both parts were excellent and was able to do install in about 2 hours (don't have a lift and was working by self). Now just have to see if wiring actually works when I go rent my trailer. Thanks 405621



- C56217
by:
2008 Toyota Highlander

This wiring harness fit my 2008 Toyota Highlander Sport perfectly! It's very easy to install, especially if you watch the installation tutorial video. It's literally plug and play. Everything you need comes with it, including the fuse and zip ties to hold everything in place. The only hard part for me was getting under the dash and tucking everything away neatly, but that's because I'm a big guy and there's not much room down there. I ran mine to the outside of the vehicle to the hitch and installed it in a mounting bracket instead of leaving the harness inside the car and pulling it out every time I need to use it. There was an extra hole that had a rubber plug in it near the tail light area where the connector for the harness is. I took the rubber plug out and ran the wiring to the hitch. I filled the hole with silicone caulking on the inside and outside to prevent any water from getting in. I also wrapped all of my connections with electrical tape. The four way has a dust cap to protect the pins from dirt and debris when not in use. I installed it on the hitch using the mounting bracket (item 18144) here: https://www.etrailer.com/p-18144.html . Looks great! I tested my connections and everything works perfectly! Great product, great price, and you save a ton of money on installation by doing it yourself! Thanks, etrailer.com, for the great tutorial and product research! 499598



- C56217
by:

Easy to install and directions are good. No cutting or soldering, just plug in and route where it works best for you. I did not cut hole and run cable to underside of vehicle as suggested. Instead I leave the trailer connector inside the the rear hatch area when not in use and it pull out so the hatch squeezes the wire against the hatch gasket. Thus no leaks or rust on underbody sheet metal and connector does not get contaminated. 661957



- C56217
by:
2011 Toyota Highlander

Please read the product reviews before installing a Curt trailer hitch for a 2011 Toyota Highlander. The instructions for trimming the panels is incorrect. Nothing has to be done on the passenger side. Just bend it slightly to get it in place. On the driver's side, the printed instructions are wrong. A 1.5" cut not a 2.5" is what is needed. Follow along the edge of several small holes to the large hole near where the end is snipped away that portion of the directions are correct. I attached a photo, not sure it will be attached. Also loosely install the Curt trailer hitch on the driver's side first, otherwise it won't line up. Tolerances are bit short on the width in my opinion. But it's now on and working fine. 214617



- C56217
by:
2011 Toyota Highlander

The customer service, as others have mentioned, is amazing. From the initial order confirmation through product install, they were very helpful. My hitch arrived bent and after a brief call to Bill in customer service, I was up and running in NO time. The online videos were super helpful, thanks!! 130916


Comments
Thanks for the follow up!It?s awesome. Works like a charm!A friend gave me some advice that sadly I didn?t listen to though. He told me, ALWAYS remove the ball hitch when not in use. That way when you walk around the back with groceries you didn?t hit the hitch with your shin! lol Sadly last week, after a year, i had my first encounter with the hitch while carrying groceries! lol Hopefully it?s my last.
Joe M - 05/18/2015

11814

- C56217
by:
2016 Toyota Highlander

Just bought a 2016 TOYOTA HIGHLANDER XLE. Had a trailer hitch but no wiring to it. Found etrailer online. Wasn't sure if it had trailer tow package or not. The online video etrailer put out there showed me how to easily determine. Took 15 minutes. Their website also explained what that meant: tow package meant the power converter was already under dash (from factory) and one connector in rear of vehicle; no tow package meant 2 connectors in rear, and no converter. Thus I ordered C56217. They sent me an email telling me it was at my door before I was even. The whole job took about one hour. (TOYOTA dealer wanted to charge me $130 for them to do it.) Shipped with detailed instructions and pix. A few things the video didn't show, but were included in instructions: disconnect neg lead of battery; insert additional 10A inline fuse into harness (slips right in and included); connect GND wire to a good GND point on vehicle. (I used an ohm meter to find an existing GND screw.) I also notched out a place for the wire in my trim (exacto knife) as to avoid crimping wire. Also, scissors slightly opened acts as great trim clip removal tool. To sum up, I would not hesitate to use etrailer again or to recommend them. 5 stars all the way around. 544685



- C56217
by:
2016 Toyota Highlander

Shipping was prompt. Arrival was without damage. Instructions were clear and easy to follow. Installation time was about an hour as the instructions predicted. The fit was perfect! The qualtiy seems good and the hitch looks good on my vehicle! 433334


Comments
Excellent..no problems!
Tom D - 09/17/2018

43672

- C56217
by:

The hitch receiver itself is great; easy to install etc. The only glitch is the Curt T-connector harness. Item C56217 is designed to attach under the dash to activate that part of the system that is not activated in a vehicle without the tow package. The wire with the trailer connector is then attached to a pigtail next to the taillight. BUT, the instructions contained in the package indicate that both the wiring and the control box are to installed in the rear of the car. Perhaps that's true of another version of this product, but not this one. It works great when you wire it according to the manual...just not if you try to follow the instructions in the package. 130639


Comments
The harness that I received had two sets of instructions, one for a 2008-2013 Highlander, and the other side of the paper had instructions for the 2014 Highlander.The 2008-2013 instructions worked perfectly for my 2010 Highlander, which had the mount under the steering wheel.The 2014 Highlander supposedly has the mount in the back with the pigtail as you described. I dont know, I dont have this model vehicle.Make sure youre reading the proper side of the instructions when installing.
-- comment by: Benjam W - 06/30/2014

5219

- C56217
by:
2010 Toyota Highlander

Hitch arrived w/in a week of placing the order, free delivery! Box was slightly banged up, but hitch was not damaged at all. Please note there is no interior packaging around the hitch. This was a self-install, one man job. Hint: watch the etrailer videos & other videos online as this will help a lot. I had no issues w/fitting the hitch but one of the tips I did use, was to reuse the box the hitch shipped in as support for the hitch during installation. I also used a scissor jack for final mounting to line up all bolts. I tightened to the recommended torque and was VERY pleased w/the final outcome. Passenger side under panel trim did not need trimming, drivers side did require a cutout but you can trim this smaller than the instructions detailed. Hitch looks great on my 2010 Toyota Highlander! Ordering from etrailer was easy & I would do so again, if needed. 181275



- C56217
by:

I purchased the trailer hitch and wiring harness at the same time. The wiring harness was simple to install, we watched the video and played it along side us as we did the job. The only thing I found was that the large white connector has to be tucked back up out the way or the 'trunk tray' won't fit back in properly. Everything went great, lights tested and worked.......and then where's my Leatherman? Looked all over for it and couldn't find it. Surely I didn't reinstall everything and leave it buried in the bowels of the car...........sure did. 456143



- C56217
by:

Nice product, easy to install towel hitch and wiring. 860391



- C56217
by:

I bought this trailer connector harness about a year ago and it installed easily and continues to perform as specified. 858593



- C56217
by:
2013 Toyota Highlander

I found exactly what I required and I found it very easily. I would recommend etrailer to anyone and I already have. I received my purchase very quickly and at an unbeatable price. Keep up the excellent work! 853786



- C56217
by:

Great product!! Super EASY to install! 851260



- C56217
by:

Worked perfectly, easy installation with accurate instructions. 846249



- C56217
by:

I was impressed with how easy this went on and the price being very competitive with other options out there. Some folks had commented on it being bent or not lined up perfectly, so I knew I was expecting to have to manipulate it some while putting it on. There was a little that had to be done to get holes to line up, but overall it was fine. Make sure you have a torque wrench to put this on. I tried to use my best judgement on how much torque I was putting on and schooled myself when I actually used the torque wrench. The only thing I don't care for is the hitch insert piece doesn't fit snug in the mounted end. It rattles when there isn't a trailer on. You'll swerve or be turning a corner and hear it *thunk* as it adjusts, or a bump in the road causing it to happen. Fine if you are one to remove the hitch between hauling a trailer, but I don't since I use it relatively frequently. Maybe it's just the insert I'm using, I can't say I've noticed it with other hitches, but maybe I'm used to it now. 846088



- C56217
by:

Easy to install and check with the tester ( extra purchase). I am no pro, but this was really simple thanks to the great video from etrailer!! 845939



- C56217
by:
Toyota Highlander

I ordered this for. 209 Toyota Highlander SE. the directions were easy enough to follow and it seems to work perfectly. My only advice is, don’t put any of the panels back until you have checked to make sure the trailer lights are working as the less times you have to remove the plastic clips the better. 845387



- C56217
by:
2008 Toyota Highlander

Easy assembly and good product 845336



- C56217
by:
2017 Toyota Highlander

I seldom take the time to write a review but I felt compelled to share my excellent overall experience with etrailer.com. I ordered the C13200 trailer hitch receiver, 2" ball, 2" ball mount receiver, pin/clip, and C56217 wiring harness for my 2017 Toyota Highlander XLE. All arrived in no time and in excellent condition. The installation videos and PDF documents are outstanding. I installed the hitch receiver in roughly 45 minutes - includes time to convince brother in-law to come over to help hoist it into place. Wiring harness installation was a breeze, roughly 20 minutes (again, great instructional videos). I could not be happier with the finished product. Thanks etrailer.com for making this a trouble free installation. If you are considering adding a hitch, etc. go no further, you are at the right place...order away. Its very easy to install and you will save a trailer load of cash!!! 849671



- C56217
by:

etrailer.com is a fantastic site! Their experts walk you through the pros and cons of each hitch they offer which I found very helpful in making my decision. Also, they provide how to videos on installation which helps in knowing what tools you'll need for the job and step by step instructions to complete the job. I am totally satisfied with the products I purchased and had the hitch installed and wiring kit in just about 2 hours time in my garage. My only negative would be the instructor for wiring the Curt wiring kit shows you taking the 4 pin connection out the back hatch and the winding it up and stowing it away when finished. I made mine permanent by running my wire through the factory grommet and mounting it to the spot on the hitch provided. Overall A+ for company, product, support and quick delivery after placing my order 847630



- C56217
by:

Installation was quick, 30 minutes, and simple. Instructions were clear and helpful - the most time consuming part of installation was finding the correct fuse size and correct location in the fuse box. Highly recommended. 830334



- C56217
by:
2019 Toyota Highlander

Went together just like it was supposed to. No problems at all and quick installation. Highly recommended item and business. Three time customer and even got my sons to order their hitch from etrailer due to my very satisfying experiences with this company. 829666



- C56217
by:
2016 Toyota Highlander

This wiring worked out perfect on my 2016 Highlander. The instructions were easy to follow and everything needed was there. 827576



- C56217
by:

The item works great and looks great on the vehicle. Can't say enough good things about the customer service and how quickly the item arrived. Etrailer.com saved me about $700 from using the dealership (Quote was $1100 to install). Awesome product, great price, quick shipping, and great customer service! 827558


26
577
Show More Reviews

Ask the Experts about this Curt Custom Fit Vehicle Wiring

  • How to Determine if a 2019 Toyota Highlander Has a Tow Package
    Basically what it boils down to is that if you have the tow package you'll already have a 4-Way trailer wiring connector on your 2019 Toyota Highlander so if you don't already have one odds are you need a wiring kit with the converter like the Curt # C56217, Tekonsha # 118449, or Hopkins # HM11141845. The other way to tell is to check and see if there is already a converter on the wiring harness in the rear hatch area. If you check out the attached picture you can get an idea of where...
    view full answer...
  • How to Determine if a 2018 Toyota Highlander has a Tow Package
    To send me your picture you can just reply to me here. To me that connector you found sounds like where you need to plug a converter in which would mean you don't have the tow package. Look at the picture I've attached. If it looks like this will plug into the connector you found then that's what it is. It shouldn't be a connector for a brake controller because your 2018 Toyota Highlander doesn't have a custom adapter to install a controller. If this is what you need then I recommend...
    view full answer...
  • What is the Difference Between the C56217 tand 118449 Wiring Harness for 2015 Toyota Highlander
    The difference between the Curt # C56217 and the Tekonsha # 118449 is mainly that the Tekonsha wiring harnesses, and specifically the powered converter boxes, we've found to be a bit more reliable over time. They will install in the same manner and provide you with the same functions. I've linked the installation videos for both of these parts for you, as well.
    view full answer...
  • Can the Curt T-Connector be Permanently Mounted on the Outside of a 2019 Toyota Highlander
    Yes, you definitely can mount the Curt T-Connector # C56217 next to your hitch receiver so that it is readily available. We haven't had any customers come in and ask for it to be installed that specific way yet (January 2019) so I don't have a video, but there should be a grommet in the rear cargo area of your 2019 Toyota Highlander that you can push the 4-Way Flat connector through. If you need to cut the grommet to push the connector through then you can use some sealant like the...
    view full answer...
  • How to Test Powered Module of Curt T-Connector Harness for 2018 Toyota Highlander
    In order to test the powered module of the Curt T-Connector Vehicle Wiring Harness # C56217 you will need to use a circuit tester such as the Cordless Circuit Tester # PTW2979 and test the wires going into the module, and then the wires coming out of the module. If there is power going into the module, but none coming out, that means it could be faulty and needs to be replaced. This harness does have a 1-year warranty. A converter will often go out due to a short in your trailer wiring,...
    view full answer...
  • How To Route Trailer Connector On Curt Harness For 2019 Toyota Highlander
    In regards to the Curt T-Connector Vehicle Wiring Harness part # C56217 which is a fit for a 2019 Toyota Highlander, you have two options to secure the trailer connector. The option that Curt recommends is to simply route the connector up through the cargo tray and into the hatch area. The other option would be to permanently secure the trailer connector outside the vehicle to the hitch tube with part # 18140 and part # 18144. The best option will really come down to how often you use the...
    view full answer...
  • Determining If 2016 Toyota Highlander has Tow Package for Picking Out Trailer Wiring
    If you contact a Toyota dealer and give them your VIN they'll be able to tell you for sure if you have the tow package or not. Sounds like you are trying to determine this so that you can pick out the correct trailer wiring harness. The Curt # 56042 is all you need if you do have the trailer towing package and the # C56217 would be what you need if you do not have it. Basically the # C56217 comes with the # 56042 and a converter box harness that wouldn't be present under the dash if you...
    view full answer...
  • Adding 7-Way Trailer Connector and Brake Controller to 2015 Toyota Highlander Limited Platinum
    Your pictures did not make it through so please email them to me by responding to this message. In the meantime the easiest way to determine if a vehicle has the factory tow package is to have the dealer run the VIN in their system and they should be able to tell you how the vehicle is equipped. You can also tell me the VIN and I can run it through some decoders to see if I can figure it out. It is possible for some vehicles to have the tow package wiring but not have the factory...
    view full answer...
  • Recommended Trailer Wiring Harness for 2011 Toyota Highlander Hybrid
    I cannot speak as to why Toyota would offer two different harnesses, one for the hybrid and one for the non-hybrid. If my memory serves correctly, originally Tow Ready and Curt differentiated between the two models, having a different application for each model. The wiring harnesses they now offer, part # 118449 for Tow Ready or # C56217 for Curt have been designed to work with either model. I have spoken with my representatives at both companies, who have confirmed that either harness...
    view full answer...
  • Installing Trailer Wiring Harness on 2019 Toyota Highlander Hybrid
    It sounds like you're looking through the installation instructions for the Curt T-Connector Wiring Harness # C56217 that requires you to first disconnect the negative battery terminal. You are right that on the 2019 Toyota Highlander Hybrid the 12V battery is located in the left-hand side of the luggage/cargo compartment. You are also correct that disconnecting and reconnecting the battery may at first prevent the hybrid system from re-starting. Keep in mind though that disconnecting...
    view full answer...
  • 2009 Toyota Highlander Trailer Wire Harness Recommendation
    Actually the Curt harness part # C56217 that you referenced is the replacement for the older model part # 56034 that you also referenced that is no longer available. With that being said the # C56217 would be the right choice for your 2009 Toyota Highlander and would work well. This harness does use a newer circuit board design than the older model converter boxes. This box uses surface mounted technology which is far superior to the through-hole style that older boxes used. I attached...
    view full answer...
  • Brake Controller and Install Needed for 2013 Toyota Highlander with 4-Way
    From the wiring harness you installed part # C56217 you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions and an install video for this product as well. This comes with everything needed to install the Prodigy P3 part # 90195 which is a great choice by the way. This is arguably the nicest brake controller available and would...
    view full answer...
  • Can Curt T-Connector # C56217 be Routed to Outside of 2015 Toyota Highlander
    The Curt T-Connector Vehicle Wiring Harness # C56217 referenced in your question is confirmed to fit your 2015 Toyota Highlander. The harness will plug into factory ports that are located behind the interior trim panel in the rear cargo carrier. While we find that it's easier to leave the wiring in the cargo area, it may be possible to route the wiring under the vehicle and over to the trailer hitch. If there is a nearby grommet that allows access to the outside of the vehicle, you will...
    view full answer...
  • What Is different Between Curt And Tekonsha Wiring Harness For 2016 Toyota Highlander
    Basically, the different between the Curt wiring harness, part # C56217 and the -One Vehicle Wiring Harness, part # 118449 is they are made by different manufacturers. Both the Curt wiring harness, part # C56217 and the T-One Vehicle Wiring Harness, part # 118449 harnesses plug in the same way(behind the tail lights), and both have a powered converter. They both have a 4-way trailer connector. The # C56217 has a maximum amperage output of 3-amps for the stop/turn lights and 6-amps...
    view full answer...
  • Troubleshooting Trailer Wiring Harness # C56217 on 2011 Toyota Highlander
    As a first step, run through the installation instructions again and verify the installation procedure. Ensure that the converter is securely plugged into the connector under the dash. Give the converter a gentle tug to ensure the plug is securely seated into the connector. Do the same with the trailer connector at the rear of the vehicle. Once this is verified, you will need to use a circuit tester like part # 40376 on the trailer connector. Test the pin socket fed by the brown wire...
    view full answer...
  • Where is the Underdash Connector to Install Curt Wiring Harness # C56217 in 2014 Toyota Highlander
    The connection point for the 4-way tow harness is located behind the driver's-side interior trim panel in your rear cargo area. The ModuLite plugs into the factory wiring harness beneath your dash, on the driver's side. Once you've plugged in the ModuLite, locate the "towing fuse" position in your fuse box and insert the included 10-amp fuse. Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2013 Toyota Highlander
    The Curt Harness part # C56217 and the Tow Ready Harness part # 118449 that you referenced are two different brands version of the same wiring harness. Both would install the exact same and would work well on your 2013 Toyota Highlander. I am partial to the Curt unit though since it uses a more modern circuit board (surface mount vs. diodes) and can handle a slightly higher amperage draw at 3 amps per stop/turn light circuit and 6 amps per tail light circuit vs. the Tow Ready that can...
    view full answer...
  • Troubleshooting Installation of Tow Ready Wiring Harness on 2016 Toyota Highlander
    The Curt Wiring Harness # C56217 does have an external ground for the converter box harness that would need to be grounded to the vehicle's sheet metal. However, when I checked your order, you ordered the Tow Ready Wiring Harness # 118449 and this wiring harness does not have a ground wire that needs to be grounded separately. To begin troubleshooting, I recommend using a circuit tester, # 40376, to test the 4-Way connector of the # 118449 harness. I've attached a video showing how...
    view full answer...
  • How to Determine if a 2012 Toyota Highlander has a Factory Tow Package
    The best way to determine if your 2012 Toyota Highlander has a factory tow package is to have a Toyota dealer run the VIN number in their computer system. They can tell you how the vehicle is equipped that way. If they say you do not have the tow package use harness # 118449. If you do have the factory tow package use # 56042.
    view full answer...
  • Wiring Harness Recommendation for 2017 Toyota Highlander
    To power your trailer lights, I recommend installing the Curt Wiring Harness with 4-Flat # C56217. This harness includes a converter to combine the separate signals from your 2017 Toyota Highlander. I've added links to a video review and install for you to take a look at.
    view full answer...
  • Installation of a Trailer Wiring Harness on a 2014 Toyota Highlander V6 Hybrid
    Depending on if your 2014 Toyota Highlander has the tow package or not will dictate where the 4-way flat plug harness will connects on your vehicle. If you have the tow package, you will use Curt # 56042. The plug for this harness is located behind the driver's side interior panel in your vehicle's rear cargo area. The plug will have four pins and will connect to the white connector end of the wiring harness. If you do not have the tow package, the wiring connectors will be located...
    view full answer...
  • Parts Needed to Add a 7-Way Trailer Connector to a 2014 Toyota Highlander
    The Curt trailer wiring harness # C56217 and other wiring harnesses for your 2014 Toyota Highlander include converter boxes because the vehicle has separate turn signals and brake lights but trailers have combined turn signals and brake lights. The converter box converters the separate signals from the vehicle for the proper output to the trailer. It does not make the lights any more or less bright. This is a 4-Way trailer connector so it only has the basic lighting functions. For electric...
    view full answer...
  • Where are the Connectors Located in 2015 Toyota Highlander to Install Curt Wiring Harness # C56217
    The two harnesses you are looking for to install the Curt Wiring Harness on your 2015 Toyota Highlander are located exactly where the installation instructions indicate they will be; located in the rear hatch behind the rear scuff panel on the driver side of the vehicle. For more information on how this product installs check out the install instructions and install video I attached to the right.
    view full answer...
  • Does Curt Trailer Wiring Harness # C56217 Fit 2017 Highlander Hybrid
    Yes, the Curt trailer wiring harness part # C56217 that you referenced does fit the 2017 Toyota Highlander Hybrid like what you have.
    view full answer...
  • Troubleshooting Trailer Lights Staying On All The Time with 2019 Toyota Highlander
    Since you have ruled out the wiring on your trailer as being the issue there has to be some kind of short with the wiring or converter on your Highlander that's causing constant power to be sent back to the trailer running lights circuit. I first recommend just giving the 4-Way itself a visual inspection on the Highlander. Check for any corrosion or debris that needs to be cleaned out even though this is unlikely on a newer vehicle like yours. Then check the brown wire from the back...
    view full answer...
  • Is 10 Amp Fuse Included with Curt Trailer Wiring for a 2008 Toyota Highlander Enough
    Yes, the 10 amp fuse that comes with the part # C56217 is adequate with the Curt harness part # C56217 that you mentioned. I actually just recently talked to Curt about this very same question and the difference is that the 10 amp fuse is what the Curt harness requires but if you were to use the Toyota trailer wiring harness you would need to use a 30 amp fuse.
    view full answer...
  • Finding the Brake Switch Wire to Install a Brake Controller on a 2014 Toyota Highlander
    You have to test the brake switch wires with a circuit tester such as # PTW2991 to determine the correct wire for a brake controller red wire. You want the wire that only has power when the brake pedal is pressed and not with the headlights or turn signals on. On a 2013 Highlander we installed a brake controller on, the brake switch wire was blue. I would start testing with the blue wire on the brake switch if applicable to your 2014.
    view full answer...




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality custom fit vehicle wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

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
Installed by:
Jeff D
Video Edited:
Joshua S
Video Edited:
Jacob T
Video Edited:
Sue W
Video Edited:
Chris R
Test Fit:
Nicholas E
Test Fit:
Shane T
Test Fit:
Randy B
Test Fit:
Brent H
Test Fit:
Shane H
Test Fit:
Robert C
Video by:
Kathleen M
Video by:
Alan C
Video by:
Jonathan Y
Video by:
Michael B
Written by:
Laura H
Updated by:
Rachael H
Updated by:
Sarah W
Updated by:
Hannah L
Updated by:
Kristina F
Updated by:
Isabelle B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.