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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 7 Round - Blade
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector

Item # C56357
Our Price: $81.10
You Save: 42%
Custom Fit Vehicle Wiring

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Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56357 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (44)
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CURT Custom Fit Vehicle Wiring - C56357

  • Custom Fit
  • Trailer Hitch Wiring
  • 7 Round - Blade
  • CURT

Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required.


  • Provides a 7-way, blade-style 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 4-pole, 5-pole, and 6-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points behind rear bumper
    • Plug in connector
  • Includes required relays to activate functions
  • Comes with a spring-loaded dust cap for 7-way connector


  • Maximum amperage: 10 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's factory tow package wiring harness, which is located behind the rear bumper. Once you've plugged in the tow harness, insert 2 of the blue relays and the brown relay into the included jumper harness. This harness then plugs into the port that is located behind the driver's-side trim panel in your rear cargo area. Plug the remaining 2 blue relays directly into the relay box under your hood.

Once installation is complete, the 7-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.

It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 7-pole connector itself - to help prevent corrosion.

56357 CURT T-Connector - OE 7-Way Blade

Replaces CURT 56401

Installation Details C56357 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector - C56357

Average Customer Rating:  4.8 out of 5 stars   (44 Customer Reviews)

Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required.

2017 Nissan Pathfinder

I couldn't have done this without the install video on Taking the trim apart on my vehicle was a lot more comfortable when I walked thought the video step by step. The install was relatively painless. This harness went along with etrailer product number 76301 (trailer hitch receiver). In hind sight, I wish I installed the tail light connectors BEFORE I put in the receiver. The connectors were harder to reach with the receiver in the way.

I DID NOT use the 7 pin connector that came with the package. I wanted a 7-pole and 4-pole connector for flexibility. I used's part number HM40975 which was compatible with this item.

Matt W.


After a year of using this product, I have had no issues. Everything has been working as expected.

Matt W.


After a year of using this product, I have had no issues. Everything has been working as expected.

2014 Nissan Pathfinder

Great product fast shipping easy install. 5 minutes. By the way no need in dropping tire to put this or the hitch on like was described.


Easy to install following the video provided. Solid hitch.


I’ve ordered hitches for two different vehicles as well as a roof rack for a third vehicle. Everything is as advertised and fits perfectly. This is my go to spot for legit vehicle products.


So a quick prerequisite; to my knowledge this is the ONLY wiring harness available ANYWHERE for a 2013 Nissan Pathfinder. That being said for $** for the Harness and mounting bracket after shipping and handling, it is on heck of a deal.

Heads up, the paper instructions aren’t very detailed. I’d recommend watching a [online] video. etrailer also recommends a video to watch in the emails they send after purchasing.

Shipping was faster than usual and etrailer is very transparent on when they accept your order and when it is actually shipped.

They asked me to take photos of the process probably for this review specifically. I do apologize to anyone expecting to see photos… I Forgot.

Bear in mind you will probably have to get creative with the mounting bracket. Hope you have a cordless drill. Please don’t mount it to the bumper plastic, that is not long term and it will eventually fall off.

Everything works beautifully, it was a pain but it’s worth every penny.

Definitely not sponsored or paid to say anything.

Infiniti QX60

Product was well designed and constructed. Installation instructions were good but finding the mating plugs in the Infinity QX 60 was a chore to see them and to access them. Not the fault of E-Trailers, just the way it was. E-Trailers support has always been excellent and this is the second towing package I have purchase from them.


worked well but somehow I wiggled the wrong wire and now the rear tailgate door doesn't lock . I will open things up again to try to find the problem. I wish I had a color coded wire diagram.

2015 Nissan Pathfinder

I had to wire my 2014 nissian Pathfinder trailer hook ups. I got the products from etrailer. Followed the videos. Took me 15 minutes give or take a few. I will always recommend etrailer from now on. I also had a problem with my shipping address and was contacted by email. And etrailer got it figured out quikly.


Also easy to install. Worked correctly on 1st try. Would like to see etrailer include a little diagram showing how to check the wiring using a little pocket meter (which is also quick to do if you don't have a trailer to connect to check it).


Everything is super easy to install. Nice quality. The directions were easy to follow, if you watch a car specific video its even easier.
The one thing that I missed is I didn't know enough to buy the bracket to mount the plug on the hitch.

2016 Nissan Pathfinder

Quick easy and painless. Everything went together nicely, big thanks to the install video. Always nice to watch it done one time especially when your removing interior panels. Wish I would have done the underneath wiring prior to installing my hitch, would have saved a minute.


Excellent purchasing experience and an excellent product.
I installed the hitch by myself in 30 minutes and the electrical took a bit longer but the instructions were very clear and detailed.


Great product just plug and play. With the videos online it’s a easy install. Thanks etrailer

2013 Nissan Pathfinder

Thanks for the detailed instructions and the product. It saved me over $40 and came in just in time to save my camping trip. Much appreciated and your company came highly recommended from a friend.


It came on time and was the correct harnesses. Quality is good.


Best website on the interwebs.


Easy to install. Followed the video and didn't have any issues!


Nice product that connects easily to factory plugs. No complaints


Recommended! Easy hookup and installati on


It arrived in a timely manner and fit as described.


It is just as simple as it can get. Plug and play. No cutting or anything like that.

2016 Nissan Pathfinder

This was the fastest shipping I have had next to 2 day...would definitely order again or I should say will


Perfect fit. Excellent install video.


I honestly didn’t want to have to install wiring, but this package is so easy. I highly recommend it.

2015 Nissan Pathfinder

This was easy to install on my 2015 Pathfinder and worked great.

Show More Reviews

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

  • Should My RV Be Running When Connecting the Tow Vehicle?
    It doesn't really make a difference if your RV is running or turned off while actually connecting. Turning your RV off sounds like an unnecessary extra step. If you're having issues with the wiring or your connectors just let me know what what's going on and I will be happy to help troubleshoot. Frayed or incorrect wiring or severed connections could be causing a short that you would encounter whether you're hooking up or towing.
    view full answer...
  • Will Curt Trailer Wiring # C56357 Fit 2017 Infiniti QX60
    If you see all of the needed ports to install the Curt trailer wiring harness part # C56357 in your 2017 Infiniti QX60 then most likely you have the tow package and this would be the correct kit. This kit comes with the needed relays and harnesses to complete the wiring and activate it as well.
    view full answer...
  • Troubleshooting Sparks on Safety Chains When Connecting to Hitch
    What you've been told is likely the culprit, and I don't believe that it's coming from an issue on the Curt # C56357 you've installed. I would check the ground wire on the trailer wiring harness to make sure that it is connected to a paint, rust and debris free spot on the trailer frame. This is the most likely cause of the sparks that you're seeing. If you can check this and see if it continues, that's a good place to start. If you're still experiencing the same issue after cleaning off...
    view full answer...
  • Where Does Curt Trailer Wiring Harness # C56357 Install on a 2013 Nissan Pathfinder
    I have included a link to a video showing how trailer wiring harness # C56357 installs on a Nissan Pathfinder. Basically there are factory connectors in the cargo area where you will plug in the short harness and install three of the 4 included relays to that harness. The longer harness and the 7-Way plug in under the vehicle. Neither harness plugs in at the front of the vehicle. The one leftover blue relay may be needed in a certain location in the in-cab fuse box (or under the hood in...
    view full answer...
  • Installing Curt 7-Way T-Connector Wiring Harness on 2016 Nissan Pathfinder
    The Curt 7-Way T-Connector Vehicle Wiring Harness # C56357 referenced in your question is confirmed to fit your 2016 Nissan Pathfinder and will plug into the same ports behind the rear bumper that you used for the 4-Way Harness # C56281. You will need to remove the 4-Way harness for this to install. The relays though that you already installed for the 4-Way are the same for the 7-Way harness so these won't need to be changed. I have attached an installation video that you can use for...
    view full answer...
  • Troubleshooting No Trailer Running Lights for 2017 Nissan Pathfinder
    I know you said you checked fuses but did you check relays? The "no running lights" problem is pretty common on Nissan vehicles like your Pathfinder and the issue is typically a missing or bad relay for this circuit. It's so common we almost get this question daily. For the needed relay you can use one of the blue relays from the Curt Relay Kit # C57000. I attached a picture where the harness is that has the running light circuit relay you'd need to find.
    view full answer...
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  • Troubleshooting No Trailer Running Lights with Curt T-Connector # C56281 on 2019 Nissan Pathfinder
    If the trailer running lights aren't working with the Curt T-Connector Vehicle Wiring Harness # C56281 installed on your 2019 Nissan Pathfinder, most likely the two additional blue relays that are included in the kit just need to be installed. The fuse box where these will be inserted on your Pathfinder is actually located under the hood, directly behind the driver's side head light. I have attached an image below that shows the box with the two relays already inserted (there will also...
    view full answer...
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  • Color Wiring for Replacing 7-Way Connector on Curt T-Connector C56357
    The wiring colors from the Curt T-Connector # C56357 will be the following: Black - 12V Power White - Ground Blue - Brake Controller Output Red - Reverse Yellow - Left Turn/Stop Brown - Running/Tail Lights Green - Right Turn/Stop My contact at Curt confirmed this for me. If you don't already have a replacement 7-Way then you can use the Hopkins Endurance Quick-Install 7-Way Trailer Connector with Universal Pigtail Harness # HM47210 which has the following wiring configuration: Red -...
    view full answer...
  • Troubleshooting Trailer Light Functions Connected to Curt Trailer Harness on 2015 Nissan Pathfinder
    The Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # C56357 sounds like it was installed correctly and wouldn't have any draw on your battery except when a trailer is connected. I recommend using a circuit tester like # PTW2992 to test each function when the trailer is not connected to confirm you did the installation correctly and all relays and fuses are working correctly. If not, check the connections again and then check fuses. Relays are...
    view full answer...
  • Replacement 7-Way Socket for Use with Curt Trailer Wiring Harness part # C56357
    For a replacement 7-way socket for the Curt trailer wiring harness part # C56357 that you have you can use the Pollak # PK11893 and you'd be set. The Curt harness uses the standard USCAR 7-way connection so almost any replacement 7-way would work.
    view full answer...
  • 7-Way and Brake Controller Recommendation for 2014 Infiniti QX60
    It's safe to say that if you do not have trailer wiring at the rear of your 2014 Infinifi QX60 but we can easily install a 7-way on your vehicle with the part # C56357 and it will be ready to use the brake controller install harness part # 3050-P to install a Tekonsha brake controller like our best selling P3 part # 90195. For a brake controller I would recommend the Prodigy P3 Brake Controller part # 90195. This is our best selling brake controller because of how well it works and how...
    view full answer...
  • Bracket for Mounting 7-Way Install on 2019 Nissan Pathfinder with Curt Hitch
    Since the Curt hitch part # C13309 that fits your 2019 Nissan Pathfinder doesn't have a trailer wiring bracket (none of the hitches for your vehicle do) the best options is to use a bracket # PK12711U attached to the lower rear fascia so that you can easily mount the 7-way kit that also fits your vehicle part # C56357. I attached a picture that shows what the wiring connectors look like at the rear of your vehicle as well.
    view full answer...
    Image 1 for
  • Mounting Bracket for Curt 7-Way on 2016 Nissan Pathfinder
    You can use the # PK12711U to mount the Curt 7-Way Connector # C56357 on your 2016 Nissan Pathfinder. Depending on your setup, you may also want the no drill mounting bracket # C57202 which will allow you to attach the bracket to your trailer hitch using the included hose clamp. I have attached an installation video below for your reference.
    view full answer...
  • Part Needed to Add 7-Way to 2011 Nissan Pathfinder
    To add a 7-way to your 2011 Nissan Pathfinder, all you need to do is add the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # C56226. This will replace your 4-way and give you the 7-way you need to tow your camper with electric brakes. You'll then be able to use a brake controller like the Curt TriFlex NEXT # C24VV with Wiring Adapter # C51382.
    view full answer...
  • Trailer Hitch Receiver and 7-Way Wiring for 2017 Nissan Pathfinder
    The wiring kit, part # C56357, includes everything you need to get it installed on your 2017 Nissan Pathfinder. This kit is plug and play and is easy to get installed. I have attached an install video to help with the installation. The hitch for your Pathfinder, part # 76031 includes all of the hardware to get it installed on your Pathfinder. There is a welded on bracket to add wiring, but you need another bracket, Part # A10-9394VP, to get the plug for a 7-way mounted more solid.
    view full answer...
  • Parts Needed to Tow a Trailer with Brakes Using a 2015 Nissan Pathfinder with Tow Package
    If you have a fully functioning 7-Way already installed on your 2015 Nissan Pathfinder with the tow package then all you need is a brake controller and an adapter. You can verify that your 7-Way is fully functional by using a circuit tester # PTW2979 to test the functions like you see in the attached picture. I recommend the Tekonsha Prodigy P3 # 90195. This is a proportional brake controller that will apply the brakes on your trailer at the same time and with the same intensity as the...
    view full answer...
    Image 1 for Image 2 for
  • Parts Needed to Install Brake Controller 2014 Nissan Pathfinder with 4-Way
    To install a 7-way on your 2014 Nissan Pathfinder you'd need to go with the Curt kit part # C56357 which comes with everything and then to install a brake controller like the Brake EVN # TK63VR all you'd need is the install harness # 3050-P which plugs in under the dash and you'd be set.
    view full answer...
  • Trailer Hitch and Wiring for a 2016 Infiniti QX60
    For a trailer hitch that fits your 2016 Infiniti QX60 AND does not require any trimming you can use Draw-Tite trailer hitch # 76031. The other hitch option requires trimming. I have linked a video showing an example installation for you. For trailer wiring you can use # C56357 to add a 7-Way connector or # C56281 to add a 4-Way flat connector. I have linked videos showing example installations for you. I recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with...
    view full answer...
  • Wiring Adapter For Tow-Pro Liberty on 2017 Nissan Pathfinder
    We have the exact adapter you need for your 2017 Nissan Pathfinder for the brake controller, with the parts being the following: - Redarc Tow-Pro Liberty Brake Controller # RED24FR - Plug-and-Play Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers # RED39FR If your '17 Pathfinder has the factory 7-way already, you won't need any other parts; should you also need to add a 7-way to your Pathfinder, then you can do so easily with the Curt T-Connector Vehicle Wiring Harness for...
    view full answer...
  • How Can I Tell if My 2013 Nissan Pathfinder Came With Factory Tow Package
    All 2013 Nissan Pathfinders came pre-wired for a tow package, so we know your Pathfinder at least has something. If your Pathfinder came with the tow package option from the dealer, then you would have a trailer hitch and trailer wiring at the back of the Pathfinder. Since you are asking for a wiring kit, I'm guessing you need the wiring still. For this I recommend the Curt 7-Way Wiring Harness, # C56357, if you want a 7-pin trailer connector or the Curt 4-Way Wiring Harness, # C56281,...
    view full answer...
  • Trailer Wiring Recommendation for a 2008 Infiniti EX35
    Thank you for your purchase of the Class I 1-1/4" Curt Trailer Hitch Receiver # C11510 for your 2008 Infiniti EX35! When it comes to the wiring you'll have to use a splice-in option and for that I recommend the Tekonsha Upgraded Modulite Vehicle Wiring Harness # 119147KIT because we've found the Tekonsha wiring to be the most reliable brand we carry. This kit has the black module box that helps protect your OEM wiring and a power lead so your trailer lights will be powered straight from...
    view full answer...
  • Recommended Trailer Hitch for a 2020 Infiniti QX60
    Yes, the Curt Trailer Hitch Receiver part # C13126 is a confirmed fit for a 2020 Infiniti QX60 and it offers a bolt-on installation. Furthermore, the Curt hitch has a hidden design which means you only see the receiver tube so you don't have to look at a bulky cross tube at the rear of your vehicle. In regards to installation, this should only take around an hour or so and you don't really need any special tools either so you can do this at home by yourself. If you will be towing then...
    view full answer...
    Image 1 for
  • What is the Difference Between The 2 Weight Ratings On The Curt Trailer Hitch Receiver C13126?
    You are correct the Curt Trailer Hitch Receiver # C13126 for your 2019 Infiniti QX60 has 2 different weight ratings. The standard towing capacity(600lbs tongue weight/4,000lbs trailer weight) is for when you are using a basic ball mount like the Curt # C45036. The weight distribution towing capacity(600lbs tongue weight/5,000lbs trailer weight) is for when you use a Weight Distribution Hitch # FA92-00-0600. This type of hitch better distributes the tongue weight of the trailer across your...
    view full answer...
  • Installation of Redarcs Tow-Pro Liberty Brake Controller on Nissan Pathfinder with CAN Bus System
    Yes, per the installation instructions, your 2014 Nissan Pathfinder with the Controller Area Network, or CAN Bus system, it is recommended by the manufacturer that you use the 30-amp circuit breaker kit # 331-CBK30-EB. This, along with your Redarc Tow-Pro Liberty Brake Controller, # RED24FR and the Plug-and-Play Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers, # RED39FR (TPH-014) will have you all set. As long as your Pathfinder has the factory 7-way already. However, to add...
    view full answer...
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Carrie F
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Employee Amanda M
Written by:
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Employee Zach D
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Employee Shane H
Test Fit:
Shane H

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