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Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In

Item # C51352
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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 brake controller and then plug the other end into the junction box beneath your 's dash. 1-800-940-8924 to order CURT accessories and parts part number C51352 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In. Accessories and Parts reviews from real customers.
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2005 Chevrolet Silverado - Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In

  • Trailer Brake Controller
  • Wiring Adapter
  • Plugs into Brake Controller
  • CURT
  • Vehicle Specific

Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your brake controller and then plug the other end into the junction box beneath your 's dash.


  • Plug-in wiring adapter allows for quick, simple installation of your electric trailer brake controller
  • No cutting or splicing required
    • Custom connector end plugs into the electric junction box beneath the dash of your vehicle
    • Other end plugs into the back of your electric brake controller
  • Compatible with time-delayed and proportional brake controllers from Curt
    • Brake controller must have built-in plug for adapter to connect - will not work on controllers with pigtail wiring harnesses
  • 2' Long, 12-gauge wires have protective covering to deter damage
  • Limited 1-year warranty

Installation of Curt Brake Controller Adapter

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.

Junction Box on VehicleBrake-Control Adapter Port

This adapter plugs into the port that is built into the electric junction box beneath your vehicle's dash. The black box is located to the left of the steering column, just above the carpet. To plug in the adapter, first remove the cover on the box. The adapter plugs into the second slot from the left, on the top row.

No hardwiring is required to install this adapter. 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.

51352 Curt Quick Plug Brake Control Adaptor Harness

Installation Details C51352 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51352

Average Customer Rating:  4.8 out of 5 stars   (112 Customer Reviews)

Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your brake controller and then plug the other end into the junction box beneath your vehicle's dash.

2003 GMC Yukon XL

The adapter is as advertised, although I have an older brake controller that I had to do a small amount of wire splicing.

Just fine.
David - 03/04/2023


Great product, plug and play with brake controller. Install was 10 minutes. Fast delivery with tracking. Price was lower than anywhere else.


The Curt electric brake controller was the easiest installation I have ever had. I ordered the custom wiring adapter along with the brake controller; it all came with easy to follow instructions and it only took about 30 minutes to install the entire unit. I had done some checking around to get estimates from various companies which do the installations and their costs were around $300.00. The Curt unit including the adapter wiring was $**.00 and a very easy install. I used the brake controller during a recent camping trip on which I was pulling a 24 foot camp trailer. The controller worked great and I could easily control the trailer in some extreme mountainous terrains in Wyoming.

Still works great after a year no problems at all.
Pete D - 07/28/2017


Made brake controller install ridiculously easy. Thanks

Made the installation of brake controller super easy. Absolutely worth it. I wouldnt do it any other way after using this.
Micheal c - 08/06/2021


Easy to install and functions as it sho uld.


Worked perfectly and was easy to instal l.


Made the install so much easier being vehicle specific. 2006 Chevy Suburban


Bought this trailer controller cable with a Curt Trailer Brake Controller. I dont know if it works or not. I installed this along with thr trailer brake controller at the same time. Nothing works. No lights power up on the controller. I highly respect Curt Products as I have many installed on my truck, but I'm disappointed with this combo purchase.


Given the fact that I only planned to tow my travel trailer one way up to the lake, I wanted an inexpensive brake controller. I looked online and in stores, and they were all over $100. When you added in the wiring. The controller I purchased from E-trailer only cost $49.99 including the wiring. I simply plugged it in, and after a short test tow, it works great. Took about 15 minutes to install. I'm very satisfied with my Curt brake controller. Got it in 3 days after ordering. Arrived fast, installed fast, and works great at a great price. What more can you ask? I'll be ordering from E-trailer in the future. Thank you.

2006 Chevrolet Colorado

George, the wiring harness only took 3 mins. to install and works great. I couldn't take a picture because it tucked away so well. Now I can pull my 21 ft camper over the Colorado mountain passes safely. Thank you and stay healthy and safe.

2004 Chevrolet Silverado

Appears to be the correct harness as the plugs match the brake unit and the splice in GM pig tail that came with the truck. Bought it to avoid cutting and splicing as well as avoiding voiding the brake unit warranty. Big Benefit also that I can unplug and move to another vehicle if needed Had the unit within 5 days including the week end, that's great customer service by etrailer


Right fit for my Chevy.


Great service


Great price and prompt order processing. Controller mounting kit and harness made for a very easy install; about 20 minutes. Unit worked without any problems on a recent 300 mile trip with a horse trailer. Went over some fairly steep inclines in the Blue Ridge area of Virginia. Chose Curt Tri-flex controller over the more expensive brands because two of the three trailer dealers in the area carried those units as their default controller. The unit has all the braking functions without the fancy screens and interfaces. Found that I rarely looked at the controller display and the discrete black box worked for me.


Plug and play for GM trucks, very easy to hook up to the brake controler. Watch the instalation videos to see what terminal it plugs into on the vehicle.

Im still using the above items and have had no problems with them. Thanks.
Bill B - 06/09/2015


Second time I have ordered parts for towing my trailer. Product was a snap well 2 snaps to install and works perfectly. Allows me to move my brake controller between both my vehicles. Used customer service this time as well and was extremely satisfied. Staff was knowledgeable, kind, and friendly.

2004 Chevrolet Silverado

Great way to get an electric brake controller wired into your vehicle. GM was real smart to put a plug receptacle in the electric box for the electric brakes for trailers. etrailer shipped my order right away and all the items ordered were in great shape. Will be buying from them again.


First, let me say that I have never been disappointed with any of my transactions with etrailer. This holds true with my latest purchase of a Curtis brake controller and pigtail. This is my second because the first was fried when the trailer wiring shorted out. I received the controller in 3 days, which included a partial weekend. The pigtail make installation so simple. I literally had the old controller out and the new one in within 5 minutes. I will look at etrailer first for any of my trailering needs.


-Plug in and go--- Quick and easy installation. Works great. etrailer was great to deal with. I had a missing part in one of the boxes, due to careless shipping, and I E-mailed about the part and etrailer sent a new part right away. Thanks for great service.

2004 Chevrolet Avalanche

This was well worth the money. No. cutting required it was fast and easy. Come to find out I had an universal type one that came with my truck but it would have required me to cut wires. But the universal one did have a fuse that is needed to have the trailer brakes work. So keep in mind you may need to buy one of those. I assume they are cheap but just another step in having it work!


Fast delivery. Super easy installation. Super easy setup. I had my trailer hooked to my truck and was testing the new brake control in 30 mins after opening the box from the big brown truck.

2005 Chevrolet Silverado

This made installation of the brake controller a dream. Connect to controller and plug into the port for the truck, 2005 Chevy 1500 Silverado. No muss, no fuss. Total installation time was about 20 minutes.

2004 Chevrolet Suburban

I deal with Etrailer all the time fast on there shipping and never any problems ! All of my installs were made easy because of there diagrams & help . I Would Recomend Etrailer to anyone for There Rv , Boat anytype Trailer needs . Thank You Etrailer You are Always on time Everytime.

Chevrolet Venture

This adapter made the Curt Venture trailer brake controller easy. It took only about 1/4 hour for the entire job.

2001 Chevrolet Suburban

Plugged into the vehicle and hooked up the brake controller, which indicated it was correctly installed. Haven't had the opportunity to test with a trailer, but should work fine. Great follow-up emails advising order received, shipped and delivered.

Show More Reviews

See what our Experts say about this CURT Accessories and Parts

  • Location to Install Brake Controller Power Fuse on 2003 GMC Sierra
    I am assuming you are speaking of the fuse that activates the power feed to the brake controller. The 30 amp fuse is installed in the power distribution box as shown in the photo I have edited. The power distribution box is located under the hood, on the drivers side on the fender well. I have linked you to an FAQ article that describes how to install a brake controller on a 2003 GMC Sierra.
    view full answer...
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  • Troubleshooting a Voyager Brake Controller for No Lights When Brake is Applied
    Have you tried testing the controller with the trailer connected and the truck moving? The vehicle needs to be moving for the controller to work. Otherwise you might need to set the level of the controller. I attached a picture that I took from the troubleshooting chart of the installation instructions that covers the issue you are having with this controller.
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    Image 1 for
  • Troubleshooting Curt Brake Control Harness # C51352 Installation in 2007 Chevrolet Silverado Classic
    The Curt Brake Control Harness you reference, part # C51352, is compatible with both time-delayed and proportional brake controllers from Curt and is intended for vehicles with factory tow package wiring. As you noted, the connection port for the vehicle-side connector is under the dash in the electric junction box. The box interior is shown in the photo provided; the correct connection port for the harness (the second one from left on the top row) is highlighted in red. There are one...
    view full answer...
    Image 1 for Image 2 for
  • Wiring Adapter Needed for Curt Reflex Trailer Brake Controller # C51130 on 2005 Chevrolet Silverado
    The wiring adapter needed to install the Curt Reflex trailer brake controller on your 2005 Chevrolet Z-71 Silverado is part # C51352. No cutting or splicing is required. Just plug the one end into the brake controller and the other end into the junction box under the dash. I have attached the installation instructions for you.
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  • Troubleshooting Brake Controller Installation On 2003 GMC 3500
    When checking the brake output circuit of a 7-Way there should not be 12 volts of power all the time. A Curt brake controller will have what is termed 'dead' voltage at idle. This means there is voltage but no amperage draw. You can test for amperage instead of voltage to see if that is the case. If so, then you do not have a problem. If you are showing amperage draw that would indicate a short somewhere or possibly a problem with the brake controller. For a Curt brake controller, and if...
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  • Troubleshooting Curt Tri-Flex # C51140 Brake Controller Installation in 2006 Chevrolet Silverado
    Thank you for your recent purchases from The quick-connect brake controller adapter harness you purchased along with your brake controller, part # C51352, is the correct one for your 2006 Silverado. Brake controller installation in your truck, if it did not have a factory tow package, requires you to complete some electrical connections and install fuses in the engine compartment, at the power distribution box. Since you also ordered a 7-way, I will presume your truck did...
    view full answer...
  • No power to New Trailer Brake Controller Install on a 2007 GMC Sierra Classic
    You will likely have to make at least one connection under the hood of your 2007 GMC Sierra Classic to power the brake controller. You may also need a fuse. I have included a link to the right that shows the connections that you will need to make under the hood to make everything fully functional.
    view full answer...
  • Is the Curt Custom Wiring Adapter # C51352 the Same Part as the Curt 51352?
    We have the part! The harness you need is the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51352. This is the exact same as the Curt part number 51352. I went ahead and attached a demo video of the harness for your convenience.
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  • Wiring Installation For Brake Controller On 2007 Chevrolet Silverado
    As simplistic as it sounds, the first thing you need to do is make certain which Silverado model you have. For 2007, Chevrolet made both the Classic model and also made the New Body model. On the New Body models, there is no panel connector for a brake controller harness, so hard wiring the brake controller is necessary. I have linked you to an FAQ article that explains the wiring for a brake controller on a 2007 Chevrolet Silverado New Body with factory integrated brake control. I have...
    view full answer...
    Image 1 for
  • Brake Controller Recently Installed on 2007 GMC Sierra Classic not Getting Power
    There might be a missing fuse, or the final connection at the fuse block might not be complete. If you look at photo E in the FAQ article I have linked to, you can see the 30 amp fuse that activates the power feed to the controller. Between the power distribution box under the hood and the firewall, there should be a red wire with a ring terminal on the end of it. This ring terminal should be attached to the power stud closest to the firewall. Insert the fuse if it is missing, or make...
    view full answer...
  • Can Curt TriFlex Trailer Brake Controller # C51140 Be Temporarily Disabled When Backing Up
    I did some research on this controller for your 2006 Chevrolet Silverado, and there are no features available that will turn the Curt TriFlex Brake Controller, part # C51140 off. The best way to temporarily disable the controller when you intend to back up is to unplug the trailer. If you were to unplug the controller, it would have to be reset when it is plugged back in. I spoke with my contact at Curt and they strongly advised against doing this because if someone failed to reconnect...
    view full answer...
  • Will a Brake Controller Install and Work Fine on a Truck with an ABS Brake Light On
    A brake controller like the Curt Venturer part # C51110 does not tie into the actual braking system of a truck like your 2004 Chevy Silverado so it would still work fine. As long as your brake lights are functioning properly on your truck a brake controller will function just fine since that is the only circuit it has to use to operate. To install this controller in your truck like the one you referenced all you would need is the correct install harness, part # C51352. I attached an install...
    view full answer...
  • Install Harness for 2005 Chevy Tahoe for Curt Spectrum Brake Controller
    Yes the correct brake controller install harness for your 2005 Chevy Tahoe is the part # C51352 to install the Curt Spectrum # C51170 that you mentioned.
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  • What Brake Controller Adapter for Curt Brake Controller on 2004 Chevy Silverado
    The correct brake controller adapter to use with your Curt Venturer Brake Controller # C51110 will be part # C51352, which will plug into the factory brake controller port. I've linked a review and installation video of this controller using the adapter for you to have a look at, as well.
    view full answer...
  • Wiring Adapter Needed to Install Curt Venturer Brake Controller C51110 in 2006 Silverado 1500
    To install the Curt Venturer trailer brake controller # C51110 in your 2006 Chevrolet Silverado 1500 you will use wiring adapter # C51352. This part plugs in at the back of the controller and at the port under the dash as shown in the linked installation video.
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  • Will Curt Discovery Brake Controller Work With a 2003 Cadillac Escalade?
    The Curt Discovery Trailer Brake Controller, # C51120, is a fit on your 2003 Cadillac Escalade, though it will require the use of the Curt Custom Wiring Adapter, # C51352. This product simply plugs into the port that is located in the junction box that is under your dash to the left of your steering column. The exact spot it plugs in will be on the top row, second slot from the left. I have attached links to video reviews of both of these products for you, as well as a link to a video...
    view full answer...
  • Curt Brake Controller Wiring Adapter for a 2006 GMC Sierra
    We do have a plug-in adapter for your 2006 GMC Sierra, but the Curt # C51451 that you referenced is a fit for Chevy Silverado and GMC Sierra pickups starting in 2014. For your 2006 Sierra you want the Curt # C51352 instead. This adapter will plug into the junction box beneath your vehicle's dash as is demonstrated in the attached photos.
    view full answer...
    Image 1 for Image 2 for
  • Recommended Wiring Harness For A Curt TriFlex Trailer Brake Controller In A 2003 Chevy Silverado
    The part #15085418 you referenced comes back as an OEM GM wiring harness, which you would have to go to a GM dealership to purchase. If you're just needing a wiring harness for the Curt TriFlex Trailer Brake Controller - 1 to 4 Axles - Proportional # C51140 that you linked to so you can plug it into your 2003 Chevy Silverado with factory tow package then you can use the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51352. This wiring harness will plug into...
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  • What Wiring Adapter for Curt Trailer Brake Controllers on 2012 Chevrolet Silverado
    For the 2012 Chevrolet Silverado you will want to use the Universal Wiring Adapter for Curt Trailer Brake Controllers, # C51515. One end plugs into your Curt trailer brake controller while the other end splices into your vehicle's wiring. Blue - 7-Way Output to Trailer Black - 12V Power White - Ground Red - COLD Side of Stop Light Switch (only gets hot when brake pedal is pressed)
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  • Brake Controller Does Not Work After Installation on a 2005 Chevy Silverado
    On certain year Chevy trucks there are additional connections that need to be made under the hood to make everything fully functional. I have included a link to an FAQ article to help you. Make sure that you are plugging in the harness into the spot on the top row, second from the left. The Curt harness you should be using is # C51352. With the brake controller plugged into the right spot and all the under hood connections made and fuses in place the brake controller should work just fine.
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  • How to Install a Curt Brake Controller in a 2006 Chevy Silverado 1500
    You have installed correctly all of the components you referenced. The # C51110, # C51352, and the # HM40975. The issue you are experiencing is that the tow package wiring under the hood of your truck hasn't been completed like you suspected. The blue wire will need to get run to the brake output circuit of the 7-way you installed. Since this circuit isn't connected to anything that means the 7-wires that are at the rear of your vehicle aren't all ran. You will need to run a length of...
    view full answer...
  • Brake Controller Recommendation for a 2005 Chevy Tahoe with Factory Trailer Connector
    The Curt Echo Under-Dash Brake Controller # C27JR is an excellent choice for your 2005 Chevy Tahoe. I really like it because you mount it under your dash and then you have a clutter-free brake controller to use! The correct wiring kit to connect this to the tow package on your Tahoe is the Curt Adapter # C51352. This gives you a simple plug-and-play installation that takes any guesswork out of the wiring. We have a variety of other controllers to choose from but the Echo Under-Dash is...
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  • Curt Trailer Brake Controller Does Not Power On when Installed on a 2007 GMC Sierra Classic
    There may actually be some additional connections that you will need to make under the hood. Take a look at the article I have linked that covers everything that you will need to do under the hood on your 2007 GMC Sierra Classic. First make sure you are plugged into the spot in the junction box in the top row, second from the left. Then make sure you have all the connections and fuses in the correct locations. It seems strange but also make sure the fuse you are using is a good fuse and...
    view full answer...
  • Parts Needed To Install Curt Assure Trailer Brake Controller In 2007 Chevy Silverado 2500HD Classic
    I have another option for you, but your 2007 Chevrolet Silverado 2500HD Classic has a factory trailer brake controller port so there is no need to cut any wires. To replace your current controller with the Curt Assure Trailer Brake Controller with Dynamic Screen - 1 to 4 Axles - Proportional # C49UR you will just need the # C51352 which will plug into the factory trailer brake controller port underneath the dash of your truck. I included video reviews for both of the products mentioned...
    view full answer...

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