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Install your 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 built-in port beneath your vehicle's dash.
Features:
To install your 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 connector behind your vehicle's dashboard. The exact location of the plug may vary depending on your year, make, and model of truck.
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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Buying from etrailer.com is always easy due to the technical expertise and videos. I purchased a new truck that did not have factory trailer braking, so I pulled out my unused Tekonsha trailer brake controller, ordered theis easy plug and play harness and was all set!
The wiring adapter made the project so easy ! Install was a breeze.
Great brake controller and excellent service from Etrailer as usual
Get this cable for a simple, plug-in installation. You’ll spend more time hunting for the junction already wired into the truck harness than installing your brake controller. And after installed, no worries on loosening wire connections or electrical tape wrap unraveling.
This is the third wiring harness purchase from a trailer and installation was always easy.
Everything came in the package and the product came earlier than I expected. Installing it was fairly easy. However the only thing that proved difficult was Torquing the ball down on the hitch head which luckily [RV dealer] was good enough to do that for me. I am happy With the product and looking forward to using it.
The cable fits the desired application on my 2018 Tacoma. A couple of inches longer would have been nice - it was barely long enough for where I mounted the controller. The location shown in the pic was the only location that didn't get in the way of of knees, feet or air bags. By the way, the other item in the cubby is my ham radio faceplate.
I bought this harness for my Toyota Tacoma 2018 because I installed breack controller Primius IQ and fit very Good. I’m so glad with the product, and etrailer is really fast to delivery.
Wiring harness 3031-P on a 2015 Toyota Tundra, doesn't get any easier. I have cut and spliced several brake controller over the years. This is a lot cleaner and very easy.
Easy installation. This unit is the best controller I have ever had. I utilized my existing inset compartment and just cut off the back of the compartment til I had about 2” remaining from the front flange to minimize the amount of space around the P3 controller when installed to have a better appearance.
Installation facile
Et le site internet tres bien fait
C'est mon 2e achat toujours un bon service
Bravo
Quick and simple, plug and play. No fuss or worries about it being wrong if ordered from another online retailer.
The wiring harness is exactly what most folks need for an under dash or dash mount. I found that it was more convenient to access the brake controller emergency handle and see the brake controller if I took your metal mounting bracket and turned it upside down and mounted the controller on the left hand side of the steering wheel on top of the dash with a magnet taped to the dash. This allow me to remove the controller and move it between my Tacoma and Ford F150 easily. But in order to do this you need a longer wiring adapter, so you either cut the original wiring harness and splice in longer wires or buy two harnesses and cut off one end of each and splice that together. Very happy with both the harnesses and the Tekonsha P3 brake controller.
Wayne
8/1/2022
Working great! No problems at all.
I bought this adapter to prove that my factory brake controller was not functioning properly. I am now using my old Prodigy P2 controller I was using on my previous truck n trailer, bypassed the factory unit on my current truck. Needless to say, it worked perfectly. My factory controller would not engage the travel trailer brakes no matter how I adjusted it. The P2 works with electric and electro over hydraulic brake systems. My truck has a button to select. My problem is in electric mode. If I switched to elec over hyd, the brakes lock up. I am going to the dealer to have him check the factory control and hear what they have to say.
Joe D.
3/19/2020
This adapter cable made it real easy to hookup the P2.Working great, been on a few trips after I got it. All good.I still have to follow up with Toyota about the stock controller.
received it in great time Had no problem with the installation as it worked out well Pulled the kick panel off and there it was just plugged it in , was so easy , put it in the pocket hole on the dash just had to drill a hole in the back of the pocket and run the wire thur , works Great and so easy
thanks
etrailer information and delivery was great
Bill L.
12/19/2020
worked great sold the truck and nedw owner was very happy with the install and operation
Great product. Used with Tekonsha Prodigy P3. Installed on a 2017 Tacoma to tow our 2020 T@B 400 teardrop camper.
Slm-c
5/2/2022
Excellent! Needed this to install my Tekonsha P3.
to be honest I bought this harness to modify it. I needed the plug that goes into the OEM port on the truck so I would not have to T Tap power to run accessories I simply would tie in my switches to this port to use for what I want. I still have not completed the install.
Alex
12/21/2021
great up and running and was able to fit this in without hacking up my OEM harness.
Easy fit and install. The surprise was that the harness provides full time power to the brake controller. The controller (P3) shuts itself off after 15 minutes, but I would rather have this tied to the accessory power that goes off with the key. This may be because the factory harness only provides "always on" power, but I have not confirmed yet. I will likely modify this harness to grab switched power at some point in the future
Heather A.
1/24/2021
Thank you for your review. You are correct Brake controllers such as the P3 you referenced 90195 will go into a sleep mode after about 15 minutes. It is not drawing enough power to affect your battery. We do strongly recommend to wire the brake controller to the vehicles battery instead of an accessory outlet to avoid damage to the vehicles electrical system. You could technically unplug the brake controller pigtail from the back of the brake controller each time but it will need to be reset for use since the settings will be lost.
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Day after I ordered this part I was contacted by the company to say that the part wouldn't be shipped for several weeks and they worked to get me a replacement solution. This ultimately did not work out but their customer care was something that has become a rare thing these days. I think the sales agent whose name I do not recall at the moment and a few days later got a notice that the original part I ordered was out for delivery. It arrived today I installed it in my vehicle and everything works perfectly. I would definitely do business with etrailer again for my RV needs. Thank you guys.
Not quite a year ago I purchased a new 2017 Toyota Tacoma TRD Off Road. I believe all the Tacomas come stock with a trailering package, 2" receiver hitch and a wired standard flat 4 pin and 7 pin for those using electric trailer brakes. I had a Tekonsha brake controller installed and bought the wiring harness,Item #3031-P and it plugged directly into the factory wired harness provided by Toyota. A very straight forward easy installation in my case.
My Tekonsha P2 & wiring kit 3031-P for my 2017 Tundra Crew Cab arrived timely and installation was SUPER EASY. Connected my 27 foot trailer the same day to test it. Works awesome. Disappointed in Toyota for having a poor Brake Control System, but thankful Tekonsha was able to pick up the slack.
I used this to connect a brake controller, ITEM TK63VR, to the brake harness under the dashboard of my husband's 2022 Toyota Tacoma SR5. It worked excellently and was very easy to do because the ends just snap right into the harness and the little ground wire fits right under the grounding screw. eTrailer's instruction videos are great, thats why this ol' grammy was able to do it herself! Thank you etrailer! PS I just wish that it was a foot longer.
Easy to install in our 2019 Toyota Tacoma and works great when towing our trailer!
Allison
12/10/2021
Works great!! Very happy with purchase and ease of installing!
The Tekonsha Voyager is the perfect size to fit beside the right side of my steering wheel of my 2016 Tacoma. Also the upgraded wiring harness has not given me any problem at all. etrailer gave the right professional information I needed.
Was a perfect fit for the 2019 Toyota Tacoma. Coupled with the Tekonsha Prodigy P3 Controller, It almost seems as if it was made for this truck. The unit , with some minor trimming, fit the compartment on the left side next to the steering wheel. Ground wire attaches easily to available bolt/studs with 8mm nut.
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Lawrence
9/15/2025
Absolutely no problems!