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Curt Relay Kit for Nissan Aftermarket Tow Package

Curt Relay Kit for Nissan Aftermarket Tow Package

Item # C57000
Our Price: $33.94
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This kit includes the 2 small blue relays and 1 large brown relay that are required to complete the circuits for your Nissan's non-factory-installed tow package. 1-800-940-8924 to order CURT accessories and parts part number C57000 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Relay Kit for Nissan Aftermarket Tow Package. Accessories and Parts reviews from real customers.
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  • Reviews (137)
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CURT Accessories and Parts - C57000

  • Trailer Wiring
  • Relays
  • CURT

This kit includes the 2 small blue relays and 1 large brown relay that are required to complete the circuits for your Nissan's non-factory-installed tow package.


  • Complete circuits required for towing with a 7-pole trailer connector (sold separately)
    • Large, brown relay activates 12-volt power circuit
    • Small, blue relays activate turn signals
  • Required for Nissan models that do not have factory-installed tow packages

Note: Some Nissan vehicles will require a 3rd blue relay (38666-1).

57000 Curt Relay Kit for Nissan

Installation Details C57000 Installation instructions

Video of Curt Relay Kit for Nissan Aftermarket Tow Package

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Curt Wiring C57000 Review

Today we're going to review part number C57000. This is the curt relay kit for Nissan after-market tow packages. This is a custom fit part. This is design to fit the Nissan Armada and Nissan Titan Vehicles starting in 2004's that do not have the factory installed tow packages. Now, these relays can also be used in other Nissan vehicles that might require tow package relays. This kit is used to complete the circuit for towing with a 7-way trailer connector. Basically, this large brown relay right here, is designed to activate the 12-volt power circuit.

These 2 smaller blue relays will activate the right hand and left hand brake and turn signal. These relays are required if your truck does not have 12-volt power or turn signals at the 7-way trailer connector. These relays will fit into the under hood fuse box on your vehicle. When you remove the cover off the panel, you'll notice on the bottom of the cover, it will list the locations and by using these nice directions, it will tell you what locations are used to put these relays into. One other note I do want to mention, is there's some Nissan trucks that might require an additional third small, blue relay just like this. We do sell these individually. It is listed on this product page as a related product.

It's part number 38666-1. These are for the running lights. The third one would be for the running lights. If your truck does not have a signal for the running lights at the 7-way trailer connector, then you'll probably need the additional relay. That should do it for the review on part number C57000, the curt relay kit for Nissan after-market tow packages. .

Customer Satisfaction Score:

Customer Reviews

Curt Relay Kit for Nissan Aftermarket Tow Package - C57000

Average Customer Rating:  4.9 out of 5 stars   (137 Customer Reviews)

This kit includes the 2 small blue relays and 1 large brown relay that are required to complete the circuits for your Nissan's non-factory-installed tow package.


Great availability and exactly what I needed. Obviously I'm not the only person with a base model Titan that doesn't have the 3 relays needed to complete the trailer lights circuit. 2017 Nissan Titan. I spent many hours trying to figure out why I had running lights but no signal/brake lights. These are the relays you need.


Easy to use and arrived one day early. And all three electrical parts were easy to install .
Our local auto parts store wasn’t able to provide the connectors.


Only reason for a 4 star is these relays should come with the trailer lights plug because you can't buy the relays anywhere else. Easy plug and play , great direction , definitely reccomend

For a 2022 Nissan Titan that does not come with with the tow package we do offer part # N40975
Factory Style 7-Way and 4-Way Flat Vehicle End Trailer Connector
which is the trailer plug with the relays.
-- Etrailer Expert Jenny N - 05/02/2022


Right part, easy install for my 2017 Nissan Titan, which did not come with the factory trailer relays. Thanks.


the ordering process was as good as the shipping and the product was excellent. I will use etrailer again!


Relay fit as it should and allowed for the easy install of trailer brakes


My experience with e-trailer has been nothing but stellar. I have a 2016 Nissan NV2500 van that came with a factory installed hitch and 7 way plus a wireing harness preinstalled by the factory in the cab taped up just behind the e-brake. Plus a Nissan harness in the glove box to be used to marry the brake controller to the harness under the dash. The van salesman said thats all I needed, Great! NOT! I worked for hours trying to get the the trailer with brakes to have all the needed lights too. Nothing worked. The dealer had no idea, forget trying to get hold of Taconsha by phone. I finally called the tech who installed brakes on the trailer and he said be sure to check for relays under the dash or hood because the factory alsways makes mistakes. Sure enough no relays were there to make the trailer brakes and light systems to work! Geez....The dealer wanted believe it or not $175.00 for the four relays! I argued that the van should have had them installed. They did not see it that way and never got back to me with my request to provide them where the van was set up for towing from the factory. So relying on e-traler I found a set of relays advertised for the Nissan Titan but nothing specifically for the Nissan NV van's in the way of relays. They do work perfectly. You'll need product #C57000 relay kit and #38666-1 single relay. And harness #3050 to mate from the socket under the dash to your Taconsha P2 brake controller. Look under your hood for the relay box closest to your battery. You'll see four empty sockets. Place your new relay's in the sockets as indicated under the relay box cover. Not much on the Internet as to how to do this on the Internet so I hope this helps other NV2500 van owners.

Perfect in every way.
Robert - 09/17/2019


Easy installation. Very solid hitch.


Everything was there and plugged in exactly. Only problem was that it took me a while to figure out that not all the relay go in the fuse box and that there was a separate box for the trailer relays! That wasn’t entirely clear in the instructions but once i found the right box everything was OK.


Excellent customer service, product was shipped and received in a timely manner.
Just wish I had watched there [online} channel before spending $500.00 with another company who clearly didn’t know what to do.


Information in solving a very difficult problem in getting the running and brake likes to work on a Nissan Armada was resolved quickly with good information and advice.

Worked perfectly and directions were easy to follow. Will definitely use in the future as I have in the past.


I've been using my Tekonsha Voyager Trail Brake system for the past year with no problems or concerns. I'm towing a 3100# camper behind my '11 Nissan Pathfinder and the system works great and was easy to install.

I have traded the vehicle that I installed those products on. While I did have those products they work fine, no problems and they performed as advertised.
John P - 04/02/2018


Fit exactly like the original


Came sooner than I thought.


I purchased a used vehicle, it has a combination 7/4 way connector, but was only wired for the 4 way. I needed the brown relay for the 12v to the 7 way. Purchasing the complete package was cheaper than the single brown relay at other sources. Pure plug and play.


Great quality, took no more than 2 minutes to install, clear instructions. Highly recommend the product and etrailer of course, fast shipping and great attention.

Excellent!!! Rust on the bolts but nothing serious
Gabriel - 06/04/2014


These guys are the real deal! They say what they’ll do, and they do what they say! I have ordered from them a few times with small delicate items as well as a hitch and everything has fit and worked properly as advertised. Definitely my “go to” for parts and accessories.


This was exactly what I needed for my 2008 pathfinder SE. had a factory location for the relays just needed these for my trailer brakes to work with the controller.


Although their products did not cause a problem that I was having with turn signals on my trailer they continued to assist me until the solution to the problem was corrected. Finally they sent me a site that had the information that I needed to correct the problem. Lots of time was saved as it would have taken many hours to finally locate the offending item. I am glad that they continued to help me until the solution was found.


Worked great! Can't believe that these were not factory installed on the much hassle trying to figure out the problems with the trailer lights, over nothing!


Excellent. Took less than 5 minutes to install. Very simple. Trailer lights working now. This works with a 2006 Nissan Titan without the factory installed tow package. All 3 relays together cost less than 1 relay at other places!

The service at is top-notch. I ordered on Monday and had my package on Wednesday. Prompt, professional, and courteous service. I'd recommend to all of my friends.


Love the service we get from Had trouble with our towing lights and thought we had a towing package on our truck, turned out we didn't. These were just the ticket and worked great. Great customer service and good quality parts. We'll be ordering from etrailer again.


This set saved the day on getting my Nissan ready to tow my trailer! The 7 way harness that the dealer sells doesn't let the line to charge the battery work without this!


Extremely satisfied with my purchase, I will definitely be purchasing other merchandise from etrailer. I will also be recommending this site to my friends and family. Thank you!


These relays are perfect, they fit and function in the factory sockets, and were a snap to plug in. Shipping was also very fast, and I was informed every step of the way. I will be buying more from etrailer.

Show More Reviews

See what our Experts say about this CURT Accessories and Parts

  • Brown Relay Recommendation for 2008 Nissan Pathfinder for Trailer Wiring
    The only way we offer a way to get the brown relay you referenced now is to order it with the part # C57000 that comes with a pair of blue relays as well. The Valley relay you mentioned has been discontinued.
    view full answer...
  • Trailer Lights have Stopped Working on a 2004 Nissan Titan with Factory Tow Package
    This sounds like a ground problem. What you can do is start by check the trailer side and vehicle side trailer connectors. You will want to look for any dirt or corrosion in or behind the trailer connectors. Corrosion can cause any number of lighting issues. Next move on to checking the ground connections for each connector to see that they are attached to clean and corrosion free bare metal surfaces. You can then check the tail lights themselves. Again you are looking to see that the...
    view full answer...
  • Towing Package Relay Kit Recommendation for a 2007 Nissan Armada
    The relay kit you would need for your 2007 Nissan Armada would be the Curt Relay Kit for Nissan Aftermarket Tow Package # C57000. Check out the video I attached that shows how these relays install onto a similar vehicle as yours. The relays will install under the hood of your vehicle. However, it is possible that you may also need an additional relay in the in-cab fuse box. This relay can be obtained by a Nissan dealer. But if you install the 3 relays in C57000 and everything works then...
    view full answer...
  • Will the CURT Relay Kit for Nissan Aftermarket Tow Package Fit a 2007 Nissan Armada
    Yes, the large brown and 2 small blue relays, # C57000, will fit the 2007 Nissan Armada to fully activate the trailer connector if the vehicle did not come with the factory tow package. You can use the vehicle owners manual to find the locations of the relays.
    view full answer...
  • Curt Relay Kit Recommendation for a 2006 Nissan Armada
    Yes, once you install this Curt Relay Kit # C57000 on your 2006 Nissan Armada the 12 volt-power circuit will be activated. The brown relay will activate the 12-volt power circuit and the blue ones will activate the turn signals. I attached an installation video for this product for you to check out also.
    view full answer...
  • 2005 Nissan Titan Trailer Running Lights Not Working
    The first thing I would check is the trailer wiring running light fuse located in the power distribution box under the hood. Once the fuse box is located check the legend on the lid to determine the correct fuse to check. Blown running light fuses are a common problem with the Nissan Titan trucks. If the running light fuse is not blown or missing, you should also check fuses in the cab of the truck. Again use the legend on the cover, you will have a fuse box on the passengers side and...
    view full answer...
  • Fuse Box Location for Installation of Curt Relay Kit for Nissans
    The box that has the fuse locations you will need to access is called the power distribution box, it is located behind the battery. Check out the video I attached to see what it looks like. It should be the first relay box behind the battery. I attached a picture of the box in relation to the battery that also has the fuse locations highlighted in yellow. For just the fuses you will want Curt Relay Kit # C57000.
    view full answer...
    Image 1 for
  • Troubleshooting Brake Light/Left Turn Signal on a Trailer Towed by a 2005 Nissan Titan
    The first thing I would test is the trailer connector on your 2005 Nissan Titan using a circuit tester like our part # 3808 to see if the problem lies in the trailer or in your vehicle. Check out the video I attached to see exactly how to do this. Basically, you will be testing for brake/stop light functionality of the circuit and this will tell you if the problem is on the truck or the trailer. If its on the truck I would check the fuses and relays of the tow package and replace as necessary. If...
    view full answer...
  • Will the Curt Relay Kit for Nissan Aftermarket Tow Packages Fit a 2009 Nissan Titan
    Yes, you can use the relay kit, # C57000, on a 2009 Nissan Titan. The relays included are a large brown relay that activates the 12 volt power circuit on the trailer connector, and 2 smaller blue relays that activate the turn signals. Use the owners manual to find the correct locations for the relays. In some cases an additional small relay is required to make everything fully functional. This relay can be obtained by a Nissan dealer. I have included a link to a video showing the installation...
    view full answer...
  • Will Curt Relay Kit for Nissan Aftermarket Tow Package, # C57000 Fit a 2008 Nissan Titan
    Yes, the Curt Relay Kit for Nissan Aftermarket Tow Package, # C57000, was designed for Nissan vehicles that do not have the tow package but add trailer wiring later. They will fit in the specified locations, which can be found in the owners manual for the 2008 Titan, in the power distribution box under the hood. Once installed, all of the trailer wiring functions should work.
    view full answer...
  • How to Activate the Tow Package Wiring on a 2012 Nissan Titan
    If your 2012 Nissan Titan did not come with the factory tow package, then there will be some additional relays that you will need to install to activate the trailer wiring on your truck. You will need the Curt Relay Kit, # C57000. This kit includes three relays that will need to be installed in the power distribution box under the hood. I have attached an installation video of this relay kit on a 2011 Nissan Titan for you to check out. The installation will be the same as your 2012 Titan.
    view full answer...
  • Troubleshooting No Running Lights on a 2010 Nissan Armada
    The relays you got to activate the tow package wiring of your 2010 Nissan Armada are for the 12-volt power supply and the turn signals. I would check the fuse box of your vehicle and check for towing fuses that could be blown and replace as necessary. The first thing I would check is the trailer wiring running light fuse located in the power distribution box under the hood. Once the fuse box is located check the legend on the lid to determine the correct fuse to check. Blown running light...
    view full answer...
  • Will the Curt Relay Kit # C57000 fit a 2007 Nissan Titan
    Yes, the Curt Relay Kit # C57000 will fit your 2007 Nissan Titan. I attached an install video for this product for you to check out also.
    view full answer...
  • Troubleshooting No Stop/Turn Trailer Light Circuits on a 2004 Nissan Titan
    The CURT Relay Kit for Nissan, part # C57000, will have the large, brown relay that will activate the 12-volt power circuit and the two, small blue relays that activate the brake and turn signals. These relays are installed under the hood. We have a video showing the installation of the relays, see link, at about 6 minutes in. Since the running light circuit is active you should not need the large brown relay mentioned in the video. If you check under the hood and the relays are in...
    view full answer...
  • Relay Needed for Installing Aftermarket Tow Package on 2006 Nissan Pathfinder
    For the relay, you will want to use the Curt Relay Kit for Nissan Aftermarket Tow Package # C57000. The blue relays included in the # C57000 kit activate the turn signals and the brown relay activates the 12-volt power circuit. You will need the relay for your 2006 Nissan Pathfinder if it did not come equipped with a factory tow package.
    view full answer...
  • Troubleshooting Trailer Running Lights Not Working
    The problem is definitely on your tow vehicle if the trailer seems to work fine with a different tow vehicle. Most likely the problem is either corrosion on the trailer connectors or a blown fuse or relay under the hood of your vehicle. Try cleaning off all of the pins of your trailer connector to see if that helps.
    view full answer...
  • Availability of Relays to Install Trailer Wiring on a 2012 Nissan Titan
    Yes you can use one of the blue relays like the part # 38666-1 in your 2012 Nissan Titan. This will be for the taillight circuit.
    view full answer...
  • Does a 2012 Nissan Titan Require an Additional Relay to Activate Tow Package Wiring
    The only way to know for sure would be to remove you lower dash piece on your 2012 Nissan Titan and see if the area that holds the three relays is missing the top relay. If so, then yes you will also need to get part # C57000 to replace it.
    view full answer...
    Image 1 for
  • Relay Kit to Complete Tow Package Wiring of 2021 Nissan Titan
    Yes the Curt Nissan Relay kit part # C57000 will work as the needed relays for your 2021 Nissan Titan for the tow package wiring.
    view full answer...
  • Troubleshooting 12V Circuit on 7-way Trailer Connector on 2016 Nissan Frontier
    The first thing I'd check is that the brown relay is fully pushed into the socket of the fuse block between the battery and the firewall as shown in the provided photo. If the relay is fully seated, then check the main fuse panel under the hood, the underside of the lid should have a legend on it that lists the fuse locations and what circuits each protects. Look for a location listed as 'trailer tow' or 'trailer 12V', which should be a 20-40 amp fuse. Make sure a fuse is installed in that...
    view full answer...
    Image 1 for
  • Difficulty Removing Old Relay For Towing Package On 2010 Nissan Cube
    Typically, you can just pull the relays out. From my research I read that they can be in difficult to reach areas. If pulling it out does not seem to be working you may want to use a flat plastic tool to pry the relay up until it is loose enough to remove. You want to use caution and make sure you do not damage the relay or area around the relay in the panel.
    view full answer...
  • What do the Brown and Blue Nissan Towing Package Relays Power
    The brown relay that you are missing powers the 12 volt accessory circuit of the 7-way. If that is not a circuit you plan to use it would not be necessary to install it. The blue relays control the turn signals which it sounds like you may have already.
    view full answer...
  • Relay Kit Needed for Wiring Harness on 2013 Nissan Frontier
    If you are missing the required relays for the wiring harness on your 2013 Nissan Frontier, you will use the Curt Relay Kit # C57000. This will include the 2 blue relays needed to activate the turn signals, and 1 brown relay that activates the 12-volt power circuit. They will fit into the under-hood fuse panel on your vehicle and will work on your 2013 Nissan Frontier. I have included the installation details for you to check out.
    view full answer...
  • Does Nissan Relay Kit C57000 Fit 2017 Nissan Titan
    Yes, the relay kit part # C57000 comes with relays that would work in a 2017 Nissan Titan XD. Nissan hasn't changed their relay design in quite some time now and these carry over for the 2017 model.
    view full answer...

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