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

David
3/4/2023
Just fine.
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.

Bill B.
6/9/2015
Im still using the above items and have had no problems with them. Thanks.
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.
Made brake controller install ridiculously easy. Thanks Etrailer.com

Micheal M.
8/6/2021
Made the installation of brake controller super easy. Absolutely worth it. I wouldnt do it any other way after using this.
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.
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.
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.
-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.
Worked as it should.
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.
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.
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.
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
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!
Made installation a breeze. Truck already had factory 7 pin, this was literally plug and play! Cable was perfect length
This adapter made the Curt Venture trailer brake controller easy. It took only about 1/4 hour for the entire job.
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.
Product fits perfectly. Accurate description, excellent customer service. Thank you

Andy H.
9/5/2018
As good as the day I installed it! Thank you
Only rating as good because I am concerned about the statement in the instructions to not mount the controller near any rf source. I happen to be a ham radio operator. Will be interesting to see if I run into any issues. I would have researched prior to buying but I never saw any info stating this might be an issue. I will have the controller mounted about 3 feet from a transceiver. We'll see.
Now I will say that installation was a snap. Instructions clear and the included cable went right in. No problem at all and the controller seems to work fine.
Adapter was necessary for it to work with the trailer brake. It was a plug and play unit. No cutting of wires.
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.
Easy setup for my 04 yukon great price shipment was quick, perfect fit with cable connector, controls are simple to control calibrates and detects trailer quickly.
Easy install just plug and play. Instructions should have included note on adding Fuse under the hood of my truck (go to Utube for your vehicle installation)
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Pete D.
7/28/2017
Still works great after a year no problems at all.