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Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your controller and then plug the other end into the built-in port beneath your vehicle's dash.
Features:
Note: The factory brake controller plug on certain Nissan Titan XE models has a pin configuration that does not match up with this adapter plug. To install this adapter in those vehicles, hardwiring is required.
To install your Curt electric brake controller, you need to connect the wiring of the controller to your vehicle. Certain auto manufacturers offer pre-wired options, typically known as tow packages, wherein wiring is run for you from the dash to the trailer connector on the back of your vehicle. When this is done, a port is installed at your dash so that you can easily plug in a brake controller.
This adapter plugs into the port on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash, to the left of the steering column, and it is taped to another harness near the emergency brake pedal.
No hardwiring is required to install this adapter in most vehicles. After you plug it into the factory port, you simply plug the other end of the adapter directly into your electric trailer brake controller. Because there are no wires to connect, installation is not permanent. You can unplug and remove your brake controller at any time to transfer it to another vehicle or securely stow it away.
California residents: click here
Easiest way to connect to factory wiring harnesses. Timesaver
As always, the etrailer staff came through with the right part for my Nissan.
I installed the Curt C51110 controller with the Plug & Play C51382 into my 2016 Frontier, works perfectly.
Kenny 
9/6/2017
ITS BEEN A YEAR SINCE INSTALLATION, ITS BEEN IN THE SAME LOCATION, HAVENT HAD ANY PROBLEMS! GREAT PRODUCT, GREAT PRICE!
I've had the brake controller in use for over a year in my 2012 Nissan Frontier. The install was easy and took about an hour. My truck is a 2WD model so I mounted the controller in the plug that is used to select between 2WD and 4WD on vehicles equipped with 4WD. So the install look like factory.
Perfect fit and was exactly what it said it was
the black side went into curt triflex excellently. the white side was supposed to be wired for my nissan, just clip in & done. but the wires were not the same and in the wrong sockets of the clip. my electrical man is currently working this out. HOPEFULLY.
Works exactly as it should. My husband installed easily. Still using one year later.
So much easier than cutting wires and crimping butt splices. Plus it make un-installation easier and doesn't void the warranty for the brake controller. the time saved was worth the money for me.
Bri
6/7/2017
One year later and unlike my guitar hero drum kit the insulation on the wires has not cracked and fallen off yet. Plus its nice to be able to unplug the unit from the car.
The Curt Echo is now on my Nissan Armada and works perfectly. It was an easy hookup with the supplied harness and does its job.
I ordered this wiring harness because it said it would work with my 2004 Nissan
Titan. It does not. The plug on one end of the harness matches none of the plugs on the truck wiring.
Laura E.
11/8/2017
Thanks for pointing this out, Russell. The factory brake controller plug on some vehicles primarily XE models do not have the 4 pins to match up with the adapter plug. The factory plug will need to be hardwired onto the brake controller adapter that was purchased.
Super fast shipping amazing prices!
Ordered gooseneck hitch, wiring harness and break controller for my truck. Perfect fit , easy connections best purchase ever made on internet. Very good price and great customer service! ??
Simple connection. FYI: On the 22-24 Nissan Frontier the plug-in is left of your left knee, above the kick panel. It is the larger of the 2 white connectors. No need to take kick panel off.
etrailers out did my expectations. I ordered a trailer brake controller and pigtail one day, and they were at my doorstep the very next day. Boy, talk about fast. My rig works great , easy as pie setup, good price ( and I did look around), no problems at all. You guys are great. I will be buying from etrailer.com again for any of my trailer and accessories. Great job guys and girls.
Truly plug and go, except at the back of the truck when the trailer plug harness plugged in, the brake wire and power wire were crossed. Research explained that Nissan Frontier's are known for the unconventional switch with aftermarket wiring. I simply cut, switched, soldered. All good now.
The trailer light kit I got was very easy to install with the helpful video and instruction etrailer has. etrailer made it very easy to select the correct trailer accessories for my Frontier. They were helpful when I called and the website is very easy to use! I have made other purchases through etrailer because it is easy to use and they have what I needed all in one place. Thanks!
Great product!!! Installed in a matter of minutes. Determining where to attach the control took longer than the install. Pulled the trailer on a trip on roads with several steep inclines and applied the trailer brakes sparingly on the decent. Was able to adjust with the proper brake applications needed. Worked great. Made me feel confident that I could control the trailer on any road way. I very much recommend this trailer brake control for two axle trailers.
This product is easy to install with the correct harnesses. It is relatively basic, but it handled our application quite nicely. I was a complete novice when I started this project and had to learn as I went, but this is a nice brake controller.
recently purchased a Curt Venturer Brake controller with wiring harness for my 2014 Nissan Frontier. installation was as easy as shown in the video. after hooking up camper, initial brake setup and test drive was 10 minutes! everything should be this easy!
I ordered a brake controller and a wiring harness from etrailer for my Nissan Frontier. It was shipped and delivered on time. When I went to install it everything was right and took 10 minutes to install and worked great. This was my first order from etrailer but it won't be my last. It was great to get a good price and great service
Used with Curt brake controller. Only giving 2 stars as I'm having issues with the controller and at this time, not sure if it could be this cable? Unlikely but can't rate this any higher since I rated the brake controller 2 stars and this is essentially part of that setup.
It was easy to install and works as advertised. I have never installed or used brake controllers before so I can't really give a valid star rating as I have nothing to compare it to. For that reason I will give it an average rating.
Easy installation on a 2019 Nissan Frontier with factory towing package. I opted to screw the controller to the left side bulkhead. The control knob mounted on the dash looks like it came from the factory. Much nicer than a controller slung to the bottom of the dash.
The wiring kit fits perfectly. I had a small problem with the operation of the brakes on my trailer but a quick call to the great service department and my problem was quickly rectified. I will do business again.
Your company is awesome! I can’t write about the brake controller because my mechanic is putting it on today and it is the one he recommended. What I can write about is the customer service. You made ordering simple and the follow-up is fantastic. Delivery was quick and there were no delays. I will use your company again — and again. Thank you…
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Eric
8/27/2025
Still in service after a year. Works perfect and easy to install.