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Vehicle SpecificItem # 3040-P
Retail:$15.74
Our Price: $12.08
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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.
Features:
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.
Installation Details 
2003 - 2013 Toyota 4Runner with factory 7-Way
2010 - 2017 Lexus GX 460 with factory 7-Way
2003 - 2009 Lexus GX 470 with factory 7-Way
2003 - 2017 Toyota Land Cruiser with factory 7-Way
2003 - 2007 Lexus LX 470 with factory 7-Way
2008 - 2017 Lexus LX 570 with factory 7-Way
2003 - 2017 Toyota Sequoia with factory 7-Way
2005 - 2015 Toyota Tacoma with factory 7-Way
2003 - 2014 Toyota Tundra with factory 7-Way
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.
Average Customer Rating: 4.9 out of 5 stars (845 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.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 by: Rodrigo09/17/2018
Tekonsha brake controller plug-in wire worked awesome. Clicked right into my 2012 Toyota Tundra and straight into my Tekonsha P3 brake controller. Zip tied excess wire below dash and installation was complete. Recommend this to everyone. 566110
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 - 05/23/2015by: 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
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 - 07/09/2015by: Mike G09/24/2015
This is the only brake controller I will use. User friendly and works great! 227340
They work great!
Mike G - 09/23/2016by: 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.
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Patrick B - 09/10/2013by: KRT06/03/2017
The wiring package worked fine for my 2013 Land Cruiser. Previous pictures posted by others were very helpful in identifying the appropriate plug to release behind the switch panel. As stated, it is in a holder, but otherwise easily freed with a small tab on the bottom of the fixture. Further, I was able to locate the Tekonsha controller on the passenger side of the steering column, over my leg operating the accelerator. The space is tight, but sufficient. As another stated, I don't care for the lack of an off button, but it does go to sleep, extinguishing the light. My contribution is that the removal of the switch panel to start the whole operation goes as follows: 1) Using a thin plastic putty knife or equivalent, pry the panel trim at the lower left side first. Take time to safeguard the easily damaged plastic. The first tab came off easily for me. 2) Work upwards on the left side to the top left of the panel. There are tabs at each corner that have a mild spring action to fit and need only gentle pressure. The top trim panel tabs need to go down a bit to release. 3) Coax the third (right top) and fourth (fight bottom) tabs out, taking special note that the entire trim piece is not only secured by the four corner tabs, but a lip engagement where the trim fits under the dash trim immediately to the right of the trim. 4) You may need to lift the trim just to the right of the switch panel to extricate the switch assembly. It is secured by a tab at the top left. Note that the air bag contained behind this trim piece is not compromised by any of these actions. 5) You should now be able to remove the switch panel, albeit with some wriggling. 6) The wiring is long enough to route to the spot I noted, and the ground wire secured at a point to the left and below the assembly that originally held the factory controller plug. It takes a 10 mm wrench and can be easily used as a ground. I did release the trim to the right of the switch trim, and it helped to route the wiring. It powered up but I have not used it yet, so this note is only to help the other Land Cruiser person out there remove the switch trim without a reciprocating saw. 388423
Thanks for checking the product was flawless.
KRT - 06/06/2018by: Jesse P06/03/2012
Great item, plug and play, the only way to go. Installed my brake controller in 20 minutes. 42561
by: Juan12/15/2017
Well just as a quick background to let people know I am not a mechanically or electronically inclined individual with that said when I called and ordered this product tech-support stayed with me talk to me through the process of how to look this up and where to find the actual connections which were completely different than anything I saw on YouTube or online and the installation was absolutely the simplest thing I’ve ever done on a vehicle ever so I am completely happy and 120 percent satisfied with not only the product but Support As well. I will definitely purchase products in the future and will absolutely recommend this to everyone that I know. 460407
by: Marc10/18/2018
this wiring harness made the setup of my brake controller easy in a Toyota Tundra. 575373
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 - 01/30/2014So you ran ground to negative side of battery? Or just on the frame interior somewhere?
-- comment by: Trevor - 06/29/2014For 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 - 7/1/2014by: 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
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
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
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 - 06/05/2015by: 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 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
Product been working great. I even kept the console part and move it newer Tundra truck that I brought and bigger camper. Work better than I expected. I did use the bracket that come with the controller and mounted it. So I wouldnt have to worry about it coming loose or being in so far in the console. It also allow me to use the manual brake easily.
gregory a - 08/09/2017by: 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 - 01/23/2015by: 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 - 08/31/2015by: Jim10/11/2018
plugged right in to the oem fitting. 573618
by: Kenneth10/05/2018
Perfect fit; good quality wiring harnes s. 572012
by: Elmer T.10/21/2018
Product plugged in to my 2016 4Runner and the brake controller and seems to be working fine. I know it is pretty straightforward but it arrived loose in box with other items purchased. No instructions about what to do with that extra white wire. I assumed it needed to be grounded to the car frame but it would have been nice to have "instructions for dummies" just to be sure. That said it seems to be working properly. 576258
If you scroll up toward the top of this page, you can see a link to the install instructions and an install video.
-- Mike L - 10/23/2018by: Jeremy03/17/2017
Good quality wire and nice loom 354975
by: Bob09/30/2018
The right plug makes the job so easy! 5 minutes to install! 570462
by: Eric R09/07/2018
Perfect fit to my truck. Simple connection and videos for install are spot on. 562660
by: Austin09/07/2018
Works great. No issues. 562555
by: Roxanne08/30/2018
Great for my truck great service 560015
by: Daniel08/28/2018
Watch the online video the how to in plugging it in and you'll be done in minutes! Worked on a 5,000 mile road trip perfectly without any issues!!! Thanks! 559173
by: Shawn08/24/2018
Fantastic for a Plug and Play setup!!! Works like a champ and makes it easy seeing as no splicing is necessary. 557471
by: Mike08/22/2018
A must-have for the Tekonsha P3 controller if installing in a Tundra with a OEM tow package. Literally took 10 seconds to connect the controller to my vehicle! 556631
by: Eric08/21/2018
The harness is an excellent timesaver and makes the brake controller install much easier. The only suggestions I have for the manufacturer are to offer the harness in different lengths and to move the pigtail for the ground wire to the other end of the harness. I installed my controller in my console and it required me to lengthen the harness. I didn’t want to remove the whole console to find a ground location so I installed the ground on the other end of the harness where it connects to the truck’s wiring. There are ground locations aplenty in that area of the floorboard. 556327
by: James08/18/2018
Adapter made it a quick and easy instal l. 555041
by: Jeff08/17/2018
This made installation a snap. With the help of etrailers video, I was rigged up in minutes. 554709
by: David08/16/2018
Connection right where they said it was. Great! 554210
by: Kenneth08/11/2018
Works great 552758
by: Jerry08/11/2018
Exactly what I needed for a easy instal lation. 552703
by: Kirk08/08/2018
A must have for easy, fast hookup. Worth every penny. 551155
by: John08/01/2018
Harness is a bit short and the hole in the grounding eyelet is 1mm too small to mount where suggested in the video (brake pedal mount). Controller worked fine without, I was in a hurry so I didn't mount but will now. I will splice together with the cable that came with the P3 to add length. 548540
by: Karl08/01/2018
Perfect fit for the 4runner factory ebrake harness. 548423
by: Jeff07/27/2018
Well, you may not see the actual brake controller in these shots, but I wanted to display just how much etrailer product was used to restore this old trailer. Re-decked the trailer, new wheel bearings, added brakes on all 4 with this brake controller and battery powered emergency disconnect... new rust protection, primer and paint, new lights and wiring all the way around, new wiring harness/box, and new tire carrier. Nearly all product except the decking and paint was from etrailer. the customer support was fantastic, I highly recommend this company! 546744
by: Pablo07/25/2018
Simple installation! 546062
by: Brian07/25/2018
Product arrived on time as promised, but have not yet used/tested. It couldn't have been much easier to install on my 2013 Toyota Landcruiser by using the custom connector that came with the controller, as well as simple instructions (w/ photos) found on the etrailer.com website. 545945
by: Daniel07/25/2018
My car came with a harness but it didn't have the connectors on both ends. This little harness worked perfectly for my 2012 Sequoia because it snapped into the back of the brake controller and into the manufacturer's plug. I had trouble finding a good spot to connect the ground wire but I found a video on etrailer.com that showed me exactly where to find an excellent location behind an easily removed panel. 545755
by: Mark07/22/2018
Works great. Needed a different cable to install my brake controller in a different vehicle and this did it. Perfect fit. 544655
by: Jim B08/23/2017
Replaced a time delay controller with a Prodigy P2 and the adapter harness for a 2008 Tundra towing a 5th wheel camper. Used existing mounting holes to the right of the hood release for the new bracket, so installation took about 10 minutes. Had to be careful routing the harness around the e-brake pedal but a strategically placed zip tie did the trick, the extra length of wire was tucked neatly behind the plastic "kick guard". After warming up the brakes, as recommended, it took less than 10 minutes to get calibrated. Gotta say I'm not missing the "pull and tug" , especially in stop and go traffic. Haven't made any long trips yet but initial experience has been very favorable. 424282
Have towed 1500-2000 miles using this controller. Occasionally have to adjust braking intensity due to driving conditions, but the roller adjustment is easily accessible from the driving position so I can adjust “on the fly”.
Jim B - 08/23/2018by: Phil07/15/2017
Great product!! Great shipping!! Installed this brake controller within 30 minutes. 406086
Great! Doing exactly what its made to do.
Phil - 07/21/2018by: Shannon02/13/2019
Plugged right in to my 2012 Tundra. 604864
by: Scott02/12/2019
Easy to install. Plug and play is great. 604527
by: Adam02/11/2019
Fast shipping and amazing supporting educational materials for easy installation. 604037
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