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

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

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Custom Fit Vehicle Wiring

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Custom Fit Vehicle Wiring C56217 - Powered Converter - Curt
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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 800-298-1624 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.
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  • Reviews (741)
  • Q & A (182)
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  • Why etrailer?

Curt Custom Fit Vehicle Wiring

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

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   (741 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:

Very easy to install. As always, the etrailer install videos are extremely helpful.



- 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.


Comments
Still going great. I havent had to give it a thought. Ive been very happy with it and use it frequently. Ive even recommended this to at least a couple people.
Pretty I - 07/21/2021


- C56217
by: 06/27/2021

Easy to install, good video on etrailer.com, okay instructions in product packaging. Small type.



- C56217
by:

This is my second time ordering from etrailer ... first was many years back (around 2006) and had a great experience both times. I don't even shop around anymore, just order from them. They make it super easy with videos to help you figure out the best selection for you, videos to show how to install the hitch, videos to help you install the wiring. Everything was spot-on and went just as planned. Love etrailer.com!!!


Comments
A year later and still working perfectly. Towing a pontoon boat regularly, without an issue. I am very happy with the purchase.
Christopher - 06/23/2021


- C56217
by:
2018 Toyota Highlander

Today I installed: - Draw-Tite Max-Frame Trailer Hitch Receiver (Item #76156) - Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector (Item #C56217) - 7-Way RV Upgrade Kit for Trailer Brake Controller Installation - 12 Gauge Wires (Item #ETBC7L) It took about 4 hrs at an amateur pace with manual tools. This is the second time I put a trailer hitch receiver on a Toyota Highlander. My first installation was a Curt on a 2010 Highlander. This time I got the Draw-Tite for my 2018 Highlander. Few observations: - The fact that the car comes pre-wired and with welded nuts for the hitch makes the installation smooth and easy. Nicely done by Toyota. - The Draw-Tite hitch receiver is NOT designed for use with weight distributing hitch, which may be an issue for some users. - I like the that the hitch is nicely hidden under the rear bumper and comes with the bracket for trailer electric connector. Keeps things nice and tidy. - The installation can be done by one person (with the aid of a couple of plastic buckets), but I STRONGLY recommend to have a helper. The hitch receiver is heavy and if you drop it can cause some serious damage to your body. - There is no need to remove the passenger side plastic mud cover behind the rear wheel. - There is a good reason why they don't show you the cutting and installation of the driver side mud cover in the etrailer videos. It's the proverbial PITA. :-) - The receiver ends-up about 16" from the ground (with the car unloaded), so you will need a 2-3" rise ball mount to end around 17-18" once the trailer is hooked up. - The cables can be routed nicely through an existing hole under the driver side plastic storage bin. It comes with a rubber plug which can be cut just enough to lush the connector through. This is the cable routing for OEM Toyota trailer cables. And because is it hidden under the plastic mud cover, you don't have to worry water getting in when driving on a rainy day. - Make sure to protect the cables with a plastic hose or by wrapping them with plenty of insulating tape to prevent chaffing in the places where the cables cross hitch members. Some edges can be sharp and sooner or later will cut through the insulation. - Trailer wiring and the T-connector are power all the time, regardless of if the key is in the ignition or not. So make sure to unplug your trailer when parked for extended period of time to prevent running down the battery. The T-connector itself draws only about 1 mA when idle, so you don't have to worry as long as the trailer is not connected. - The fact that you can see the hitch with the rear view camera makes hooking up the trailer a breeze by just person. Overall, I'm happy with the product. And etrailer customer services and prompt shipping was, as always, 5-stars. (I am a returning customer)



- C56217
by:

The length of the wire for the wiring harness (not the module) needs to be about 8” longer. The video on the website shows installation/use by hanging the wiring harness out under the trunk lid when in use. Then tucking inside when not in use. Ugly and prone to pinching or damaging. Correct install is to fish wire thru rubber plug and seal with a dab of sealant. Worked fine but wire just made it. Make the wire longer and provide a better install video!!



- C56217
by:
2021 Lexus RX 350

Wow... Where do I begin? First, I bought the 4 pole wiring Harness for my wife's 2021 Lexus RX350. Assuming that the trailer lights would just work, cause the wiring Harness I bought from etrailer fit perfect, and took me about 10 minutes to install. But it didn't work!! So, I wrote etrailer, and explained my problem. In about 20 hours they returned my email, with an answer. What I didn't have was the factory towing package. etrailer, provided me with a link to see the fixer upper. I purchased the Curt T-Connector, and with about 15 minutes I had my trailer lights working. Perfect product!!



- 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!


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



- 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!



- 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.



- C56217
by:

Awesome hitch and wiring package, easy to install, instructions are easy to follow. We actually just installed it 3 weeks ago onto my highlander. Love it so far! 10/10 recommended to anyone. We even told our neighbors about it for their sons jeep.



- C56217
by:

The wiring connected right up to the cars harness.



- C56217
by:

The part worked perfectly on a 2019 Highlander. etrailer step by step installation videos are the main reason I keep coming back for trailer and towing accessories.



- 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.



- 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!!


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



- 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.



- C56217
by:
Toyota Highlander

Hooked up the connector and harness with minimal issues. Did in the dark with a head torch and took just 20 min. Only slight hiccup was the fuse supplied for fitting in the Highlander fuse box. The one supplied was 10Amp, while the fuse box indicated that it should be a 30 Amp. No biggie. Glad to have purchased from here again.



- C56217
by:
2015 Toyota Highlander

At first I was confused by all the parts that came in the package. But after careful examination of other reviews I was able to install exactly what was needed for my 2015 Highlander. I have put it to use already and I can report that it works very well. Thanks.


Comments
The trailer wiring harness is working as advertised. Thank you for making my upgrade easy and dependable.
Jesus - 11/08/2020


- C56217
by:

This product was very easy to install, was mostly a plug-in installation. The videos were very helpful.


Comments
The harness has been great!
Manny P - 04/01/2021


- C56217
by:

Everything needed fit the complete wiring job comes in the box and they send a link to a video that shows step by step how to install the kit.



- C56217
by:

etrailer was awesome and their listings were easy to understand. Pros: Plugs in easily. Includes a varirty of fuse sizes. Adds a 4 wire connector. Cons: My kit was missing the dielectric grease The wire harness in the kit is not wrapped in loom. Buy 10 feet of 3/8 loom and a roll of electrical tape. IMPORTANT CHANGE: The kit has enough wire to not have to flip the 4 wire out through the tailgate and look junky when you tow. 1. Where the interior 4 wire lugs into the factor harness, cut the factory harness tape away and run the factory harness as far to the driver's rear as possible. 2. Wrap the Curt leads in the wire loom. 3. Plug the Curt 4 wire plug into the factory harness, routing it to the driver's rear. 4. Low in the rear you will find a large grommet that cares wire out to the rear, cut a slightly larger hole in it, and push your 4 wire flat through. 5. Feed as much wire as you have into the void space, which is behind the rear bumper, near the lower Driver's side reflector in the bumper. 6. Get under the rear and route the Curt harness to the hitch, there a few obvious points to zip tie the harness, then zip tie to the hitch near the receiver. This will look and function much better.



- 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.


Comments
The wiring harness has been mostly trouble free. Only in the last month the exposed metal connector came loose and disappeared. I suspect it was caused by me wiggling the trailer connection on and off each time. After splicing in a replacement port $7.00 from an autoparts store its been perfect again. Be more careful than I was and I expect youll be fine.
Sam - 07/09/2021


- 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.


Comments
Product works well! Just as expected. Thanks to etrailer.com.
Brian W - 10/13/2020


- C56217
by:

Excellent instructions, not hard to install, and permanently fixed the jacked up job a "professional" allegedly performed the first time around. That's my fifth purchase from etrailer.com (I'm hard on trailers) and I've been happy with all of them.



- C56217
by:
2019 Toyota Highlander

I have a 2019 Highlander and the installation went very well. I bought the Drawtite hitch with the mounting bracket for my wiring plug, so I wanted my wires to go under the vehicle and not through the rear door. Once I removed the trays from the back of the vehicle, there was a rubber plug in the corner that could be removed that allowed access under the vehicle. I decided to use my box knife to cut a slit in the rubber plug. I had to cut my wiring harness across the 4 wires to run them through the rubber plug. I crimped them back together as seen in the photo. I used zip ties under the vehicle and inside the back to clean things up.


Comments
Nice job on the install! I would make one recommendation.. Id use some silicone to seal the hole in the grommet where the wire passes through to prevent moisture or exhaust gasses from entering the passenger cabin.
-- Etrailer Expert Mike L - 01/28/2019

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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...
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    Image 1 for
  • 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 mostly the same manner and provide you with the same functions, but the Curt powered converter box is secured with double sided tape and the Tekonsha is a screw in. So on top of providing the powered converter, it's a more secure installation as well. I've linked...
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  • 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...
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  • Recommended Trailer Wiring Harness for 2016 Toyota RAV4
    The Curt # C56217 T-Connector you'd looked at is a fit for the 2008-2019 Toyota Highlander, so it wouldn't fit your RAV4. For the 2016 RAV4, I'd recommend the Curt # C56350 which would install as shown in the linked video. I've also linked to the product description page which shows current pricing. In addtion to the hitch and wiring harness, you'll also need a ball mount, a hitch pin and the appropriately sized trailer ball. For a ball mount, I'd recommend the # D-28 and the # PC3 hitch...
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  • Location Of Curt Wiring Harness Connections For a 2021 Lexus RX 350L Without Tow Package
    For the Curt T-Connector Vehicle Wiring Harness # C56217 on your 2021 Lexus RX 350L the connectors will be located in a different spot. The 10 pin connector should be located on the passenger side just below the taillight. The 4 pin connector will be underneath the drivers side bumper cover. It may require you to use the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # 56083 to make that connection. The video that I linked below will help you find the 4-pin connector.
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  • 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...
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  • 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...
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  • 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,...
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  • Can Curt T-Connector Vehicle Wiring Harness C56217 Be Installed In 2021 Lexus RX 350?
    I would be happy to help! The Curt T-Connector Vehicle Wiring Harness # C56217 you were looking at installs in your 2021 Lexus RX 350 the exact same way as it would get installed in a Toyota Highlander which is why the instruction manual only shows the install being on the Highlander. There is not a specific instruction manual that shows the install in your RX 350, but at the bottom of the included instructions in the 2014+ section that will be what you need to follow. The picture...
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  • 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...
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  • 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...
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  • 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...
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  • Parts Needed to Tow a Trailer and Operate Coffee Pot or Microwave with a 2011 Toyota Highlander
    It sounds like your 2011 Toyota Highlander is not equipped with the towing package. If this is the case, in order to tow a trailer with your 2011 Toyota, you will need the five following components, recommendations are listed: 1. Trailer Hitch Receiver - The Draw-Tite, # 75726, offers a bolt-on installation with no drilling or welding required. 2. Ball Mount - Draw-Tite Ball Mount, # 2923 3. Pin and Clip - Receiver Lock, # 5201 4. Hitch Ball - # 19260 for 1-7/8", # 63845 for...
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  • 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...
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  • 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...
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  • 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.
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  • 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...
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  • 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...
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  • Parts Needed to Install Brake Controller 2018 Toyota Highlander with Aftermarket 7-Way
    A 2018 Toyota Highlander would not have come with a factory brake controller as that is not a factory option. Even more so if the vehicle only had a 4-way installed from the factory. That said we can help you wire a brake controller to your current aftermarket 7-way. For a wiring kit to install the brake controller to the 7-way you would want the Wiring Kit for 2 and 4 Brake Electric Brake Controllers # 5506. This will provide the power source and ground for the wiring for the brake...
    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...
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  • Lights on Trailer are not Working and Fuse is Blown on Curt T-Connector # C5621
    I believe that the Curt T-Connector that is installed on your 2015 Toyota Highlander is part # C56217. Since it comes with a 10amp fuse you will want to make sure that you continue to use a 10amp fuse because the fuse relates directly to this wiring harness and connector - not what Toyota has. Using a larger fuse can result in damaged wires and could possibly start a fire since a fuse is meant to prevent a system from overloading. From the troubleshooting that you have already done it...
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  • 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...
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  • 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...
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  • Fuse Location for Installation of Curt Wiring Harness on 2018 Toyota Highlander
    If you take a look at the accompanying photo you can see our installer point out the exact location where you need to install the fuse in your 2018 Toyota Highlander when installing the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56217. It will be in the fuse panel under the hood on the driver's side. If you lift up the cover it will have a legend which shows where the towing fuse is. If you go to about the 7:20 mark in the linked video of this harness...
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  • 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...
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  • Trailer Hitch Wiring That Fits 2018 Toyota Highlander Limited
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56217 is a fit for a 2018 Toyota Highlander Limited without the factory tow package, though it will not be able to connect to a 4-round connector. What you would need to do is simply cut off the round connector on your trailer and splice in the Hopkins Endurance 4-Way Flat Trailer Connector # HM48110. I've added links to video reviews of these products as well as an install of the Curt harness on a 2018...
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  • 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.
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Info for this part was:

Employee Mike L
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Mike L
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Jameson C
Employee Adam R
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Adam R
Employee Jeffrey L
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Employee Jeff D
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