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Video Demo Tekonsha Accessories and Parts 3040 P

Tekonsha Accessories and Parts 3040-P Review
Video install tekonsha prodigy p3 brake controller 2013 toyota tundra 90195

Trailer Brake Controller Installation - 2013 Toyota Tundra

Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Toyota and Lexus

Part Numbers: 3040-P


Price: $12.79

Shipping Special

Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Toyota and Lexus
part number: 3040-P

Install your electric 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 harness beneath your vehicle's dash.


  • Wiring adapter eases installation of your electric brake controller
  • Custom connector end plugs into the built-in port beneath the dash of your vehicle
  • Other end plugs into the back of your electric brake controller
    • Compatible time-delayed brake controllers: Draw-Tite Activator I (5100), Draw-Tite Activator II (5500), Draw-Tite Activator III (5520) and Tekonsha PowerTrac (39523)
    • Compatible proportional brake controllers: Tekonsha Prodigy (90185), Tekonsha P2 (90885), Tekonsha P3 (90195), Tekonsha Primus IQ (TK90160) and Tekonsha Voyager (39510)
  • Wiring length: 32"
  • Limited 1-year warranty

Installation of Tekonsha Brake Controller Adapter

This adapter plugs into the 5-pin connector on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash, to the left of the steering column, taped to another harness near the emergency brake pedal.

To install your electric brake controller you need to connect the wiring of the controller to your vehicle. Certain manufacturers offer pre-wired options, typically known as tow packages, wherein these wires are run for you from the dash to the trailer connector on the back of your vehicle. Often, a brake controller wiring harness is included with your tow package. This harness plugs into a port beneath your dash and connects to the four wires of the brake controller. If, however, you have a brake controller with a plug in place of the four loose wires, you can use the Tekonsha adapter.

This adapter requires no hardwiring. It is designed to plug directly into your electric brake controller for the simplest installation possible. Because there are no wires to connect, installation is not permanent. You can unplug and remove your brake controller at any time and securely stow it away.

3040-P Tekonsha Brake Control Wiring Adapter with 2 Plugs

Video of Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Toyota and Lexus

Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.

Video Transcript for Tekonsha Accessories and Parts 3040-P Review

Today we're going to review part number 3040-P. This is the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers. This is a custom fit part number. It is designed to fit Lexus and Toyota vehicles starting in 2003. Because it fits a wide range of vehicles, I would recommend to go to our website, use our fit guide. Put in your year and model Lexus or Toyota vehicle and it will show you if this will work for your application. This wiring adapter will help ease installation of your electric brake controller.

On this end right here with the white plug, that's a custom connector end. This will plug into the built-in factory brake controller port on your vehicle, usually beneath the dash of your vehicle. The other end right here you can see, has the flat black connector. This is designed to plug into the back of your electric brake controller. This is designed to fit.

It is compatible with time-delayed brake controllers by Draw-Tite. It is also compatible with proportional brake controllers like the Tekonsha Prodigy, Prodigy P2, Prodigy P3, the Primus IQ and the Voyager. Also if you'll notice, it has an extra length of white wire on here with a eyelet on the end. This is for a ground so what you need to do is after they're plugged in you still need to make sure you connect this to a good clean ground for it to operate correctly. The length of this harness is about 32 inches long. What I want to show you right now is I have an example here is a Prodigy P3 brake controller.

We do sell those separately on our website. If you notice on the back there is a plug in. You take the black part, plug it in. You hear it snap and clip into place right there, locks into place. Again, make sure when you do plug that in, take your white wire and you do attach that to a good clean ground. On the other end you'll see this white custom connector.

This you'll just locate the built-in factory brake controller port on your vehicle. Like I said, they're usually under the dash. Locate the connector that'll match up to that, plug it in. With this ground and this plugged in, you're all ready to go. To remove it, just pull up on that clip and pull it right out, just like that. That should do it for the review, part number 3040-P, the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers. .

Customer Reviews

Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Toyota and Lexus - 3040-P

Average Customer Rating:  4.9 out of 5 stars   (559 Customer Reviews)

Install your electric 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 harness beneath your vehicle's dash.

- 3040-P

by: Robert F.07/08/2015

Easy to install. Owners manual had location of factory plug and we installed the entire system in less than an hour. We used the removable bracket so the unit can be stored in the case that was included with the controller when not towing so it is completely out of the way of the drivers legs and knees. We are a collision repair shop and I would rate the ease of installation as relatively easy if you just use common sense and consider wiring location and controller location BEFORE drilling holes in the plastic lower dash cover. Also need to be mindful on the lower air bag that protects the drivers legs in a serious collision and the routing of the wires if you install it on the right side of the steering wheel. We used wire ties and a small plastic wire holder to place the wiring in a secure place that does not rub through the wire insulation or get snagged by the drivers feet. See the attached photos. All work was performed in slightly less than one hour. 210331

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by: Chris M08/20/2013

Installed P3 this weekend in 2013 Tundra Crewmax with towing package and pre-wire. Extremely easy, even with the center console installation. Will let the photos tell the story. Did have to combine the P3 included harness with the additional OEM harness to gain the length I needed. Plug and play with the pre-wire. Hooked up to trailer and set boost levels for varying loads. Works great! Vast improvement over older model Tekonsha controller in my Ram 2500 Diesel. Pull a Kiefer BP horse trailer: about 3600 lbs empty, 7500 with 3 quarter horses and gear. Usually pull 6-8 times per year, with only 1-2 horses. Short distance and flat terrain. It took about an hour to install. Dad is a retired USAF/FAA radar technician with every tool known to man. He QC'd the job. Will try to write better review later. 96004

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by: TIm S07/25/2013

This is the first brake controller I have ever bought. I just brought home a new Toyota Tundra and a travel trailer. I didn't have the opportunity to have the dealer install a brake controller so I called ETrailer and had them ship me one next day. The controller is great. I hooked it up and mounted it on the left side of my dash. Plugged right in to my factory prewire. The only issue was I had to find a place to ground the unit, but I was able to do that by removing a panel by the emergency brake and attaching to a ground there. The installation was simple and easy. I setup the controller from the manual - which is easy to ready and well written. I did the test runs as indicated in the manual and what I gleaned from other sources and the trailer brake controller works exactly as it should. There are more features on this controller than I probably need, but it looks great and works exactly as described. I am very satisfied with the purchase. 91459


Its been almost 18 months and the controller is still working great. Ive put nearly 10,000 miles of use on it and my only gripe is that its hard to change boost settings while in motion as the size of the screen is a bit small. I didnt mount it in the most visually accessable place either though. I still highly recommend the product.

TIm S - 01/23/2015


- 3040-P

by: Richard02/19/2013

I've never hooked up a trailer break controller before, but the videos that etrailer provides gave me confidence; detailed video and exact step-by-step instructions. Kudo's. One point I'd like to make - not sure why the ground lead was not included in the pigtail. Perhaps they found that some OEM connectors were missing this lead. But since it wasn't, I had to open and pry the terminal to fit the only available bolt which slowed down the installation job, but I got there. Might recommend the pig-tail maker to use a bigger terminal ring. (white wire) I've still not actually used the product, but it appears to function as advertised. I won't be hauling until spring (Mar/Apr, depending on weather), but I'm ready. Again - great instructions from etrailer which ultimately lead me to purchase this product. 66935


Product has been working flawlessly, the meter indicates breaking power and the slide makes it easy to adjust.

Richard - 08/20/2014


- 3040-P

by: Dave L.08/21/2014

The cable is well made and installs quickly. The only thing that would have made it better is making it about a foot longer. Its current length limits mounting the P3 to the left of the steering column. 147951


Would you believe that I havent used my controller yet? I got it because my son borrows my Tundra when he tows his 12 trailer out of state. Since I bought the unit, he hasnt gone on a long trip. I can say, however, that when the display of the original unit went bad, the unit was replaced promptly with a new one. The only thing that I would have changed was to make the connecting cable that you offer about 18 longer. That way, the unit can be installed on the right side of the steering column. I had to install my unit on the left side of the steering column, where it was partly in the way of my foot when I set or released the emergency brake. Other than that, I think Ill be happy with the unit.Sincerely

Dave L - 08/31/2015


- 3040-P

by: Linus01/30/2014

Pictures of the install. Approximately a 20 min job. First picture my finger is pointing to the factory plug with the etrailer supplied harness plugged in. Note the harness did not specify that the white common with the ring terminal should be connected to ground. But then again that SHOULD be obvious. I will be towing this weekend so I will rate the product then. One minor gripe is that there is always power to the unit which is a battery drain (as evidenced with the key out of the ignition and the unit stayed on) Not sure as to the impact but the controller can always be unplugged or removed. Sorry for the dirty floor mats in the photos. 115202


Just a quick note, the controller has an automatic shut-off. After 15 minutes of the truck powering off and sitting still, the control powers down. As soon as it sees movement, it powers back on.

Patrick B - 01/30/2014


So you ran ground to negative side of battery? Or just on the frame interior somewhere?

comment by: Trevor - 06/29/2014


For this harness you can either run the ground to the negative side of the battery, or use a know ground location within the vehicle. Running the ground to the negative side of the battery will yield a better connection, however you may have to extend the wire to reach the battery. Either way you choose to ground the controller it is always recommend to test the brake controller at slow speeds and make sure that it is functioning properly before starting a long trip.

Rachael H - 7/1/2014

- 3040-P

by: Craig Y12/03/2012

Purchased Adapter along with controller. Could not be more pleased. Was under a time crunch, new truck + next day horse show = quick install and dial in. The process went flawless - 15 minutes to install and be operational and then 10-15 minutes to setup the way I wanted and dial it in for both the empty trailer and full trailer. The Adapter went along way to this simple instllation. 60489


I sincerely appreciate your follow-up and I can assure you that when need something else that you carry, we will be in contact. The Break Controller works wonderful - I have it programmed for my horse trailer in a light load configuration, a full load configuration and then the 3rd trailer configuration the controller allows, I have programmed for my utility trailer - I would highly recommend this controller and you to anyone.

Craig Y - 06/11/2014


- 3040-P

by: gutley08/07/2016

It would be easy to have this part order and install on the Tundra. i went one step further and end up using the wiring in the box with P3 Trailer brake and had to splice the wiring to make longer extension in order to install the P3 in the empty slot between the lighter and 12v socket which make is more customized look and out of way. Would be cool if they offer longer version for someone who want to install it somewhere else behind the driver's spot zone. 281088

- 3040-P

by: Forrest K.10/25/2013

High quality wiring and connectors. Excellent fit, perfect length. Controller installed earlier, forgot to order harness. Harness took about 20 minutes to connect up, including removing lower dash panel and replacing. 105170


Excellent product. Easy install. Cable, perfect length. Looks good. Can be mounted easily because of the amount of angle permitted. Nice controls, especially going from empty to full trailer. To do this just give it a boost, there are 3 levels. Also nice to fine tune with a thumb wheel, if road surfaces change, so wheels wont lock up, especially when empty. Local stores sell timer type controllers for about the same price I paid for an inertia controller from e-trailer. Highly recommend this product and e-trailer.

Forrest K - 10/25/2014


- 3040-P

by: Chuck Moneypenny02/17/2014

The item was received quicker than expected and was exactly as described. Our new trailer is not due to arrive until mid March, so I can't provide any feedback yet on its operation or performance. 116688


Thanks for your note. The equipment is working well. We had purchased a30mtravel trailer and the electronic brakes were a needed advantage. Icouldnt be happier.Ive purchased several other items, most not needing reviews. But again,the customer service, price, shipping time, and overall experience have beenawesome. We will continue to look for items at eTrailer as we find theneed. We cant go wrong.

Chuck M - 03/04/2015


- 3040-P

by: Philip C.05/30/2015

They led me to the correct wiring harness that had the correct plug to fit other end that came with the truck. Telephone support helped me figure out that controller being removed from old truck into the new truck had it's original connector plug removed and was spliced into the harness that fit the old truck. So I did the same and cut the plug that would go to the controller and spliced the new harness to the old controller. Works fine. Thanks for the help. 198899


I did a good job splicing the harness to my old brake controller and one year later it is working as it should. Thanks for the help.

Philip C - 05/29/2016


- 3040-P

by: Garen09/09/2013

We ordered a part for the 2008 Land Cruiser and was told that it's the same installation. IT IS NOT! The connection to the harness is not in the same location as Tacoma. After looking for more than an hour, I got smart and found some info on another website. Even the manufacture has the info wrong. So, if you have a 200 series Land Cruiser, your plug is located under the dash behind the switches for the mirror. You will need to take apart the lower dash panel and then push out the switch panel. There is no need to detach any switch, it all hangs out just fine. See photos for the location of the plug. Plug the adapter in from there you can follow the instructions. 99168


Thanks for the awesome review. Good info and really helpful for Land Cruiser folks.

Patrick B - 09/10/2013


- 3040-P

by: don04/17/2013

Harness I purchased made my install so simple and quick anyone could have done it. plugs into my controller, plugs into my trucks existing wiring harness connect a ground wire and you are done take mire seconds, worth every penny. 76567


I pull an 11,000 lb dual axel trailer with electric brakes, the trailer is in my opinion too heavy for the truck to pull, but the brakes work wonderfully. when i want them they are there and i can tell at a glance if there are any connection issues, I love this controller and will continue to purchase this unit, and YES i recommend this unit.

don - 04/27/2014


- 3040-P

by: craig07/21/2013

Though I had to splice to P2 harness for sufficient length from vehicle plug-in to P2 install location the harness could not have made the connection simpler. 90716


I sold the truck in which I had installed the brake controller within a few months of installation. However, I will say in that time the product performed very acceptably. Even more favorable for me in regard to this purchase was the assistance I received from etrailer.com for a rather custom installation. That made all the difference and Ill be eager to utilize etrailer.com in the future for trailering needs.

craig - 01/20/2015


- 3040-P

by: Mark N06/05/2014

Install is very easy once you locate the vehicle's brake controller plug. The plug in a Tacoma is extremely well hidden. It is high above the driver's side kick panel taped behind a plug wrapped in foam. I have attached a photo to help you locate it in a late model Tacoma. Once I found the plug, the install took less than 20 min. The controller works great. 134425


Very well

Mark N - 06/05/2015


- 3040-P

by: Ken M.09/22/2014

I purchased a Tekonshia brake controller for my 2013 Tundra, part number 90195. I also purchased the wiring harness part number 37185. My pickup has the plug pre wired on the Tundra. It can be found under the side kickplate of driver side under the dash. Its located up high. The harness can reach if you put in under the front edge of the dash. I located the brade controller to the right of the steering wheel on the bottom of the dash. You will need to make two small wholes for the bracket. Install the small bracket and then the larger one. if not you will have trouble installing the screws to the dash. Then install the large piece and next slide the brake controller in the large bracket. I set the brake for my trailer and changed the color to match the orange color of my dash lights. . Its not too bright with the orange color. The blue is pretty bright. I tow a 5,000 pound trailer and it works well. I would recommend this brake controller with the wiring harness to other truck owners. I recieved the brake in three business days. 152387

- 3040-P

by: Rob B.07/09/2011

Bought this as a simple way to wire in my Prodigy controller to a Tundra. I had purchased one of these for my Silverado and liked the idea so much I got the harness for my new truck. A new truck typically comes with a harness pigtail with a connector on one end and wires on the other to connect. You have to cut, strip, and make sure the correct wires are being used in the correct places on your controller and yes basic directions were included from Toyota. However, I opened the package, cut a zip tie, and will end up plugging this on both ends and be done and it looks better than that factory pigtail from Toyota. It is based on your vehicle model so lengths seem to vary and pricing is satisfactory. This is designed to save you time, frustration, and it looks clean opposed to that mess of crimped connectors, solder, or electrical tape you might attempt to use. Sure you can make yours look this good, but I know you can't do it for what I paid and have it look as good as a factory install. Its great for a no fuss install. 18979

- 3040-P

by: Mike A.04/12/2015

Bridget was very courteous and answered all of my questions. Product arrived extremely quick. Free shipping was nice. Installation with Toyota Adaptor was extremely easy. Hardest part was adjusting controller. I haven't used controller enough to write a thorough review but it seems to work fine. I do like the features and settings on the P2 extremely well. 184836


Wished I had purchased this controller and adaptor right after I purchased vehicle. Still works great. Way better than old controller that I had on there initially.

Mike A - 04/21/2016


- 3040-P

by: Moto Mac05/26/2013

This brake controller was received less than 3 days after it was ordered. Fast service! It looks good, the instructions are easy to follow, and I'm sure it will be as good as all the other Tekonsha models. One complaint though.....the wiring adapter is just too short! When plugged into the Toyota wiring harness, the short length of the wiring only allows installation along the bottom of the dashboard, to the left or right of the airbag below the steering wheel. When mounted on the left side, it is very awkward to squeeze my foot between the rear of the controller and the parking brake. When it is mounted on the right side, my knee hits it every time I move my foot from the throttle to the brake. Neither on of these locations are acceptable. I will have to add 12 inches of in-line extensions to the wiring so it can be located in an available opening on the lower center of the dashboard below the A/C controls. This should have been taken care of at the factory, not by the customer. 81997

- 3040-P

by: Amanda06/12/2013

My package from you guys arrived Friday night, and I installed my brake controller on Saturday using both the 3040-P harness and the harness that comes with the unit. I connected the 3040-P pigtail to the factory connector and run it as far toward the passenger side as it would reach then cut the end off that plugs into the P3 as I needed more length. At this point I went to the storage area that I mounted the P3 in and drilled a hole just big enough for the 4 wires that come out of the P3 harness. At this end I used the P3 harness that came with the controller...fished it thru the little hole and connected about where the little pocket is on the right hand side of the steering wheel. I have yet to pull my trailer with it connected....hopefully this weekend, but at least it looks good! 84298

- 3040-P

by: Ozzie07/02/2015

The brake controller was super easy to hook up. The video etrailer and other You Tubers have shows exactly how to hook it up. Very happy! I will be coming back for more stuff for my truck! 208961


This brake controller still works like champ! I put it to the test last summer with about 20 camping trips ranging from 20 miles away to 300 miles! I love the ability to boost my braking on big hills or when I come up on sudden traffic jams! I highly recommend this!

Ozzie - 07/01/2016


- 3040-P

by: Gail B06/16/2015

I placed my order with Keigan B. at e-trailer. He verified that I was asking for the right part number. Told me when it would arrive, that shipping was free, and then che3cked to see that it had arrived as promised. Rarely do you get that kind of service. Additionally the trailer brake module was easy to install and it works very well. 203851


The trailer braking controller that I received from e-trailer still is works fantastically.

Gail B - 06/15/2016


- 3040-P

by: Joe C.01/29/2014

Just what I needed. This, and the foresight of Toyota to provide a plug-in, made installing a brake controller a breeze. Great videos on their website. 115145


They are still working great. We were under the gun at the time trying to comply with new commercial vehicle rules, and your products AND ESPECIALLY your website was a very valuable resource. Your tutorials are awesome. Thank you for being a resource rather than just a retailer.

Joe C - 01/30/2015


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by: Chris M.03/12/2014

Product was easy to install between my 2004 Sequoia and Primus IQ controller. Only complaint is that the white ground wire could have been a few inches longer than the rest of the cable to allow attachment to my vehicle grounding point, which was a short distance away from the vehicle connector plug. 120409


Controller worked great pulling our camper last year. Very convenient to adjust braking level.

Chris M - 03/12/2015


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by: JimG04/17/2015

Primus IQ brake controller and the Tacoma 3040-P cable were installed on my 2010 Toyota Tacoma. I installed the controller directly under my steering column. The Tacoma towing package connector was in the exact location as per the etrailer.com instruction video. Had to drill one small hole in the sheet metal and 4 wire ties later the controller was up and running. Total installation time: 20 min. 185611

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by: Mike G09/24/2015

This is the only brake controller I will use. User friendly and works great! 227340


They work great!

Mike G - 09/23/2016


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by: Rick10/24/2016

What a good buying experience on my B&W gooseneck hitch and towing accessories for my Toyota Tundra. First of all, the pricing was good on all my items. Second, free shipping. Third great customer service and recommendations during the purchase process and then followup at shipping. Next day I realized that I had forgotten to get a suspension enhancement item I also wanted so called back. No problem, they would add it to my original shipment for just $x.xx extra. All the items arrived very well packaged. Based on etrailer.com's great videos on 'how to install on YOUR particular vehicle' series, I was able to install all the components myself. I would not have attempted the hitch without that video so I saved a bunch there due to their video's. THANKS etrailer.com!!! 312540

- 3040-P

by: jerry S07/10/2013

Received and installed the wiring adapter for the electric brakes controller on my Tacoma, it was very easy and works great. Recommend the product. 88777


E brake controller is working fine just like the day it was installed. The wiring adapter installation could not have been any easier.

jerry S - 07/10/2014


- 3040-P

by: Dennis L.05/23/2014

This has to be one of the easiest hookups I have ever done. Called dealer, he told me where the wire plug was. Look at a video installation of my truck. All work done in an hour. 2014 Toyota tundra. And it works 132171


I use it my kids use it,with my truck. IT works great

Dennis L - 05/23/2015


- 3040-P

by: Zane01/15/2013

Plug is a little short to mount in cubby of a Tundra, but a easy splice with only 4 wires. Fast and easy order, quick shipment. Installs as advertized with great customer service and competitive pricing. 63149


Everything was easy to install and has held up well.

Zane - 07/22/2014


- 3040-P

by: Eddie C03/10/2014

I bought a new trailer and wanted to go camping. I did not have a brake controller. I called around and to get a Prodigy P2 installed it would be a 2 hour drive to the dealership plus about $200 bucks for parts and another $115 for an hour of labor. I found this website, got the prodigy P3 plus 2 day shipping and installed it with their super simple video in 15 minutes all for less than $200. I was very pleased to say the least. I highly recommend them. Service was outstanding! Video instructions spot on and simple. 120012

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by: David C.05/08/2015

Install went without a hitch (ha-ha). I don't have a trailer with electric brakes yet but I'm sure it will work great. 191510


The unit works great. I have no complaints. Easy installation anyone can do it. I would spend the $$ again.

David C - 05/10/2016


- 3040-P

by: Jesse P06/03/2012

Great item, plug and play, the only way to go. Installed my brake controller in 20 minutes. 42561

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by: Al.R.06/10/2014

This specialized wiring harness makes it child's play to install a brake controller in my Toyota 4Runner. 134991


The best thing I can say about it is that I dont need to think about it...

Al.R. - 06/10/2015


- 3040-P

by: Bob T08/31/2015

Part came fast and worked as expected. The videos on the web site are helpful. An extra 6" of length would make it excellent 223081


No problems since installation, works fine.

Bob T - 09/07/2016


- 3040-P

by: Marty H03/17/2015

Bought the Prodigy P2 brake controller. Don't know if there is an off switch, or just a sleep mode (Power switch doesn't have a click position and instructions didn't mention it). Haven't hooked to a trailer yet. The Toyota attach cord was so unreachable, that we took it to the dealer and they installed it where we wanted. They said they had to take off three panels to get to the pre-wired plug. That said, hope to use the unit within the next few weeks. 179169

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by: DeeK05/16/2013

This cable is so short that mounting locations are limited to the areas under the steering wheel. I find it hard to see under there and hoped to place it in the recess in the center console where my wife and I could both monitor it. But it's not even close to long enough to reach there. I thought I'd just use the wiring harness included with the controller and the connector that came with my Tacoma and return this connector. But e-trailer's return policy meant I would have paid more to return it than it cost in the 1st place. And, they were totally unwilling to work with me on alternatives. So, i'll put it up for sale. Anybody want one??? 80552

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by: Dale V04/08/2011

No hassle hookup. etrailer was awesome, they shipped my P3 and this connector immediately and provided great tracking. They also followed up afterward. Excellent customer service!!! Real customer service is hard to find these days. Thanks etrailer!!! I haven't towed my travel trailer yet but the controller is installed in my 2008 Tundra and looks great. Everything seems to be working as it should. I can't wait to try it out. Regards, Dale V. 11353

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by: Henr L12/26/2016

Purchased brake controller for my 2014 Tuna. excellent order/shipping/receiving time.Received everything I needed with order in a very timely fashion. Website made it very easy to find and decide on exactly what I wanted. Etrailer will be my first choice for finding the accessories I need in the future. Purchased Tekonsha P3 brake controller and is the best thing to a factory installed controller I have encountered. 327969

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by: Walter Bennett04/29/2013

Just what they said easy install 78386


I have not towed a trailer very far but it worked well.Im glad I got the connector also

Walter B - 04/29/2014


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by: Chris E.08/29/2015

Easy to install. The cable is only barely long enough to mount the brake controller under the dash on the driver's side. To do so, I had to remove the plastic under dash skirt and fish the wire along the same path as some of the OEM wiring. The cable is not housed in plastic flexible conduit, and I was concerned about abrasion of the wire insulation and the dash skirt, so I had to buy some to protect the cable wires. The Tekonsha instructions available online do not show the correct under dash picture for the OEM hookup. I found it in my owner's manual and in the excellent etrailer installation videos. 222748

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by: RDM07/09/2014

Easy plug in install on my 2013 Toyota Tundra. Easiest brake install I have ever had. 140259


Works well. No problems.

RDM - 07/09/2015


- 3040-P

by: Cody C.09/14/2016

I purchased the Tekonsha Prodigy P3 progressive trailer brake controller with plug-in wiring adapter for Toyota/Lexus (for use on my 2005 Toyota Tundra). The plug-in wiring adapter was very simple to connect and works well with the Tekonsha Prodigy P3. The Prodigy itself is nice, as the progressive action of the ramped brake current, dependent on an internal accelerometer, makes for smooth trailer braking, almost unnoticeable, other than that the truck is only braking itself instead of both it and the trailer. Smooth action. Very satisfied with the Tekonsha Prodigy P3 and the plug-in adapter. :) 294807

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by: John C.08/13/2012

This product works as advertised. I used it for my first voyage towing a decent sized trailer with my V8 4Runner and it controlled the brakes well. I think my truck, which has great brakes, stops better with the trailer attached then without! The only gripe I have is that before using the unit, you must adjust the power level to the point just below where the trailer wheels lock up. Even set on the highest setting, only once could I get the trailer brakes to lock up when the trailer was unloaded. So I set it to level 12 and boost level 1 for a 3200lb load and it worked great. 51533

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by: R T06/28/2015

Great service, great product! I wanted a low profile tool box to fit in the bed of my 2015 Tacoma and the UWS box designed for the smaller ford ranger step side was perfect. Fits below the rails and over the wheel wells in a 5ft Tacoma bed. This is the 3rd item I have ordered from eTrailer in the past year, ALWAYS great service, quick delivery, and great support]. Thanks eTrailer! 207851

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by: Andy D.06/18/2015

The Tek. Prodigy P2 controller & plug-in wiring adapter installed & worked as stated on E-Trailers web page , for my 2014 Tundra , with no problems . Going to the Rocky Mts. in 4 days I had to have dependable brakes . I spoke with Bill E. at 1:00 P.M. Monday & he made sure I received my order by 2:00 P.M. go with one day to goon Wednesday & I had it installed in about 45 min. After hooking-up to the trailer , I adjusted the controller per the instructions , about 10 min.,was ready to go , with one day to pack & load . THANKS E.Trailer for the great service ! Andy 204399

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by: Rob P.05/17/2012

Well, as usual, eTrailer delivers on all accounts! Once again Janice was a Dear to deal with. She called me to inquire and make sure my technical questions were answered by Mike, and then was even nice enough to take my order right then and there. Ordered the pig tail to install the Tekonsha P3 I had previously bought from them for my old truck to install it in my new Toyota Tundra. Delivery took minimal time, and product was as listed, the perfect fit. I've said it before, you can't go wrong with eTrailer. Thank you Janice, Mike and eTrailer. I'll be back. Rob 40836

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by: Blayne11/10/2014

Went with the Tekonsha P2 controller. Super easy info and ordering from etrailer. Came quickly. Install with the vehicle specific harness was a snap. 2011 Toyota Tundra. 15 minutes probably. Plug and play. Controller works great! Only gripe would be the blue light from the display is a little bright ay night. So be mindful where your mount it. Or just put a piece of electrical tape on it when not it use like I did. Or use the clip holster to mount it and just remove the controller when not using it. I'm to lazy for that. Tape works great! ;) 160089

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by: Roy R01/23/2017

Went to this website looking for a plug & play controller for my Tundra. Searched & quickly came up with controller & harness that connected to OEM plug. Called to verify that I had the right numbers. I got a guy named Sal on the phone who checked & confirmed my part numbers & completed my order. 5 min later got the confirmation email. 3 days later got my parts & with installation video from website was adjusting new controller on my truck. Plug & play 20 minute installation. Great website with terrific customer service & equipment. Thanks Sal ! 334855

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by: J. Galt10/14/2015

I got this with the Tekonsha Prodigy P2 for my Toyota Sequoia. Installation was incredibly simple: mount it, bolt down the ground wire, plug it in. Done. Be sure to check to see if there's an installation video for your vehicle. That helped me locate the factory connector very easily. And one more thing...my factory connector had an empty female connector attached to it for convenience. You won't need it, but this harness won't fit unless you remove the empty connector. And delivery was super fast! I'm very pleased. 229966

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Ask the Experts about this Brake Controller
Do you have a question about this Brake Controller?

  • Location of Brake Controller Port Under Dash of 2015 Toyota Tundra with Factory Tow Package
  • The brake controller port for the 2015 Toyota Tundra is located behind the section of the dashboard with the tow/haul button. To reach the connector you will need to locate the notch in the access panel in the center of the dash near the driver's side. Using a trim panel puller like # ALL648544, carefully pry the panel out and undo the locking tabs to remove the panel. You will find the mating connector behind this portion of your dashboard. The correct harness for your 2015 Tundra is
    view full answer...

  • Brake Controller Installlation- 2013 Toyota Tacoma
  • It is not difficult to determine if your Tacoma has the tow package wiring in place. If your Tacoma has the OEM 7-way trailer connector installed, the vehicle is indeed prewired for a brake controller. The # 3040-P wiring harness would plug into the connector located near the emergency brake pedal as shown in the photo I edited for you. Make sure the white ground wire with the ring terminal is grounded to bare metal under the dash. If you do NOT have the OEM 7-way, the plug for
    view full answer...

  • Location Of Factory Brake Controller Port On 2007 Toyota Tundra SR5 w/ Tow Package
  • The connector should be located underneath the dash to the left of the steering column. It may be taped to another wire and tucked up and out of the way. I have linked a video installation of brake controller being installed on a 2007 Toyota Tundra using the # 3040-P adapter.
    view full answer...

  • How to Install an Electric Trailer Brake Controller on a 2011 Toyota Tacoma with Factory Tow Package
  • The installation of the Tekonsha P2 Brake Controller # 90885 and Wiring Harness,# 3040-P, could not be more simple on your 2011 Toyota Tacoma with tow package. The truck will have a wiring harness up under the dash, to the right of the steering column (the plug could also be left of the steering column above the emergency brake pedal). All you have to do is plug in the brake controller wiring harness to it, ground the additional white ground wire to a bare metal surface or existing grounding
    view full answer...

  • ABS and Traction Control Light Stays on After Installing Brake Controller on 2009 Tacoma W/Tow Pkg
  • My first suggestion would be to take your Tacoma back to where you had the controller installed. If you paid them to install the brake controller, I would expect that they should be responsible for correcting the problem for you. According to my contact at Tekonsha, there a few possible causes for what you have occurring. The most likely cause is that your emergency brake is partially engaged. Pull the release handle to make sure the emergency brake is fully disengaged. You might need
    view full answer...

  • Location of Factory Brake Controller Port on a 2006 Toyota Tundra
  • As long as your 2006 Toyota Tundra has the factory tow package that included a 7-Way trailer plug at the rear of the vehicle, you will be able to find the brake controller port under the dash, to the left of the steering column. It should be taped to another harness near the emergency brake pedal. Also note that there is a second ground wire (white) that will need to be connected in order for the brake controller to function properly. I have included a link to the installation details for
    view full answer...

  • Brake Controller Wiring Harness for a 2014 Toyota Tundra
  • If you have a factory installed 7-way trailer connector you can use # 3040-P Tekonsha Plug-In Wiring Adapter for a Tekonsha Brake Controller, such as the P3 # 90195. If your truck has a factory 4-way you will need to add a 7-way using the Universal Installation Kit for Trailer Brake Controller # ETBC7. The # ETBC7 comes with a 7-way trailer connector and the wiring accessories needed to install a brake controller. I have included some links that explain the # ETBC7 installation.
    view full answer...

  • Installing a Trailer Brake Controller on a 2014 Toyota Tacoma
  • If your 2014 Toyota Tacoma came with a factory installed 7-Way trailer connector then the plug-in for a brake controller should be there. Harness # 3040-P is the correct one for your truck and a Tekonsha brake controller. I recommend the P2 # 90885 because it is easy to set up and use and it is reliable. I have linked a video to the right that shows where the controller plugs in. This adapter plugs into the 5-pin connector on your vehicle's built-in brake control wiring harness. The
    view full answer...

  • Brake Controller and Wiring Recommendations for Towing a R-Pod with a 2011 Toyota Highlander
  • I would recommend using the Brake Controller 7 and 4 Way Installation Kit, item # ETBC7, along with the Tow Ready Harness, # 118449, that you have installed on your vehicle. This kit has all of the wiring, circuit breakers and connectors that are needed to complete a professional looking installation. We also have detailed instructions that guide you through installing this kit, see link. When performing the installation just make sure that the Red wire, from the Brake Controller you
    view full answer...

  • Replacing OEM Brake Controller On 2016 Toyota Tundra
  • I called my contact at Tekonsha about your 2016 Tundra and the OEM brake controller. They have not received any bulletins or information about the OEM controllers. We have not had the opportunity to install a brake controller on a 2016 Tundra that has an OEM controller already installed. They told me that you may have to get the computer 'flashed' in your Tundra at the dealership when you remove the OEM and replace it with the P3, part # 90195. This is a discussion you would need to
    view full answer...

  • Trailer Brakes Instantly Apply When Trailer is Plugged Into Tow Vehicle
  • Are you sure that the horse trailer has a 5-Way connector, and not a 6-Way such as part # 30205? In any event, I do not believe this is a problem with your brake controller. I would bet that the adapter or the trailer is wired incorrectly. When the adapter is plugged in, the pin for the trailer brakes is contacting the pin for the 12 volt accessory lead on the 7-Way connector on your Tacoma. As soon as the trailer is plugged in, the brakes instantly receive 12 Volts, and lock up. There
    view full answer...

  • How to Install a Prodigy Brake Controller on a 2010 Toyota Tacoma with Factory Tow Package
  • Since your 2010 Toyota Tacoma has a factory tow package, installation of the Tekonsha Prodigy Proportional Brake Controller P2, # 90885 will be very simple. Your Tacoma has a plug, tucked up under the dash, most likely left of the brake pedal. There are some panels that you will have to remove to gain access to the wiring. Find the plug, it will be the one, probably with a white connector, that is not hooked up to anything. Attach this to the corresponding end of the brake controller harness
    view full answer...

  • Installing a Brake Controller on a 2003 Toyota Tundra with a 7-Way but Not a Tow Package
  • As you probably know, in 2003 Toyota made the Tundra with or with out a factory trailer connector. So if they installed one when you bought it, they might not have run all the wiring for a brake controller. This might be why you only see 4 wires at the 7-Way. I believe this is the case, so you will need to hardwire the brake controller. You will need a brake controller. I recommend the Prodigy, # 90885. It is one of our best selling and highest rated controllers. There are two possible
    view full answer...

  • Location of the Electric Brake Control Harness on a 2012 Toyota Tacoma
  • The electric brake control harness on your 2012 Toyota Tacoma will be located underneath the drivers side dash to the left of the steering column. It should be taped to another harness near the emergency brake pedal. It will be a 5-pin connector. I have attached a photo showing the location of this harness as well as the installation instructions for the Plug-In Adapter from Tekonsha, # 3040-P, for you to check out.
    view full answer...

  • Brake Controller and Installation for a 2014 Lexus GX 460
  • On your 2014 Lexus GX460 the Tekonsha Plug-In Wiring Adapter # 3040-P that you referenced would simply plug into the connector you found. The brake controller only needs 4 of the circuits in your connector to function. The battery power supply, stoplight circuit, ground, and brake output to run to your factory 7-way. The additional ground wire should be run to a metal surface near the connector. The Toyota ground is not sufficient for aftermarket brake controllers. There should be a
    view full answer...

  • Installing Brake Controller Wiring Harness 3040-P on a 2006 Toyota Sequoia
  • Since your 2006 Toyota Sequoia came with a factory tow package, you can plug in the wiring harness, # 3040-P into the port on the vehicle. It is located under the dash to the left of and above the the emergency brake. You will remove the panel that is there on the far left, and the connector will be tucked up behind some other harnesses. It will have a white connector. I have included a link to a video that shows the installation of this harness on a similar vehicle. Make sure to also
    view full answer...

  • Brake Controller Installation on 2006 Toyota Tacoma w/ 7-Way Trailer Connector
  • Toyota didn't offer a factory 7-way option for the 2006 Tacoma, so your 7-way was either aftermarket or dealer-installed. I'm assuming that your 7-way is already tapped into the lighting circuits. Look under the dash for a coiled up blue wire, if you find one, it's most likely the brake output circuit connected to the pin in the 5:00 position on your 7-way. You'd need to hardwire the controller, using a kit like our # 5506. If you use a Tekonsha brake controller like the Prodigy
    view full answer...

  • Installing Tekonsha P3 Brake Controller # 90195 in 2015 Toyota Tundra Crewmax without Tow Package
  • If your truck has a hitch, tow button and a trailer connector I would expect that it DOES have the tow package. In this case you would use part # 3017-P to connect the Prodigy to the truck's under-dash port. Please see the linked video showing the installation process. The exact components that are included in a "tow package" can vary by auto maker, by vehicle model and model year. Sometimes the presence of a 7-way socket on the rear bumper means that a tow package is in place, while
    view full answer...

  • What is the Correct Brake Controller Wiring Harness for a Tekonsha P3 and 2012 Toyota Tundra
  • The brake controller wiring harness for the P3 and your 2012 Toyota Tundra, # 3040-P, does include a separate ground wire that you will need to attach to a bare metal surface on the truck. The factory ground in the Tundra is not sufficient for the needs of the brake controller which is why this additional ground wire is needed. I have included a link to a video showing installation of this harness on a 2010 Tundra which will be similar to your 2012.
    view full answer...

  • Installing an Electric Trailer Brake Controller from Scratch on a 2001 Toyota Tacoma
  • The 2001 Toyota Tacoma does not have a port or harness to plug in a brake controller. Instead, the brake controller will need to be hardwired using a 4 and 7 Way Installation Kit, # ETBC7. If the truck does not have a 4-Way trailer connector already, you will first need to add one using T-One Vehicle Wiring Harness, # 118379. I have included links to the installation details and a video showing installation on a 2000 model for reference. To install the ETBC7, you will first plug in the
    view full answer...

Info for this part was:

Expert Research:
Michael L

Video Edited:
Zack K

Written by:
Lindsey S

Expert Research:
DeAnne T

Expert Research:
Robert G

Expert Research:
Patrick B

Expert Research:
Michael H

Expert Research:
Jeff D

Expert Research:
Reno H

Expert Research:
Jameson C

Expert Research:
John H

Video Edited:
Andrew L

Expert Research:
Adam R

Updated by:
Laura E

Video Edited:
Dustin K

Photos by:
Jim W

Expert Research:
Jeffrey L

Video Edited:
Sue W

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