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

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

Item # 3040-P

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Accessories and Parts 3040-P - Plugs into Brake Controller - Tekonsha
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  • Brake Controller
  • Wiring Adapter
  • Plugs into Brake Controller
  • Tekonsha
  • Vehicle Specific
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. Call 800-298-8924 to order Tekonsha accessories and parts part number 3040-P or order online at etrailer.com. Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Toyota and Lexus. Accessories and Parts reviews from real customers.


  • All Info
  • Reviews (862)
  • Q & A (480)
  • Videos (8)
  • Photos
  • Why etrailer?

Tekonsha Accessories and Parts - 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.


Features:

  • 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



3040-P Installation InstructionsInstallation Details 3040-P Installation instructions

This Product Fits The Following Vehicles

2003 - 2014 Toyota Tundra with factory 4-Flat

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 - 2019 Toyota Sequoia with factory 7-Way

2005 - 2015 Toyota Tacoma with factory 7-Way

2003 - 2014 Toyota Tundra with factory 7-Way



California residents: click here


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   (862 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:
2012 Toyota Tundra

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



- 3040-P
by:
Toyota

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


Comments

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

9111

- 3040-P
by:
2008 Toyota Tundra

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



- 3040-P
by:
2013 Toyota Land Cruiser

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


Comments

Thanks for checking the product was flawless.

KRT - 06/06/2018

39348

- 3040-P
by:
2008 Toyota Tacoma

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


Comments

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

-- Patrick B - 09/10/2013

2052

- 3040-P
by:
2014 Toyota Tundra

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


Comments

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

Dennis L - 05/23/2015

11986

- 3040-P
by:
2013 Toyota Tundra

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


Comments

Works well. No problems.

RDM - 07/09/2015

13194

- 3040-P
by:
2012 Toyota Tundra

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



- 3040-P
by:

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


Comments

They work great!

Mike G - 09/23/2016

21200

- 3040-p
by:
2013 Dodge Ram Pickup

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



- 3040-P
by:

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


Comments

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

2674
Comments

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

-- comment by: Trevor - 06/29/2014

5204

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:

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



- 3040-P
by:
Toyota Tundra

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


Comments

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 - 08/09/2017

26998

- 3040-P
by:
Toyota Tacoma

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


Comments

Very well

Mark N - 06/05/2015

12344

- 3040-P
by:

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



- 3040-P
by:
Toyota Tundra

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


Comments

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

8852

- 3040-P
by:
2016 Toyota 4Runner

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


Comments

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 - 10/23/2018

44967

- 3040-P
by:
Toyota Tundra

this wiring harness made the setup of my brake controller easy in a Toyota Tundra. 575373



- 3040-P
by:

plugged right in to the oem fitting. 573618



- 3040-P
by:

Perfect fit; good quality wiring harnes s. 572012



- 3040-P
by:

The right plug makes the job so easy! 5 minutes to install! 570462



- 3040-P
by:

Good quality wire and nice loom 354975


Comments

Works great zero problems, the oh [email protected] saved me 1 time.

Jeremy - 10/04/2018

44340

- 3040-P
by:

This is my second time I bought this exact controller and harness...the first one was an easy install on my 2014 toy tundra crewmax...easy plug and play and has worked great, this new one is going on a 2005 Toyota tundra sr5 extra cab but haven't installed it yet. First one took about a half hour. 629452



- 3040-P
by:

Works as desired. Hope this helps someone: The only issue I had was with finding the socket in the trucks harness. The company who put in my keyless entry put electrical tape around the plug, so i had to start cutting into tape bundles to then realize what they did. What should have been 5 minutes turned into an hour. 629243



- 3040-P
by:

Brake controller was easy to install and works very well. Simple to adjust. 625522



- 3040-P
by:

Installed trailer brake controller on 2008 Toyota Tundra... super easy, minimal tools needed. 623133



- 3040-P
by:

Worked perfect for my 2014 Tundra and easy to install. No issues! 622011



- 3040-P
by:

It fit! 621882



- 3040-P
by:

Perfect plug in for the Tundra. 621734



- 3040-P
by:

Fast and accurate service 619780



- 3040-P
by:

Outstanding addition to my trailering purchase. Thank you Lori! 616493



- 3040-P
by:

First purchase from eTrailer was a great experience. The video on installing Tekondha brake controller on my specific model and year Tundra convinced me to do my own install using this wiring harness. 616417



- 3040-P
by:

Great product ! When researching available trailer control modules, I found etrailer site with the Tekonosha primus IQ controler and the wire harness for my 2011 Tacoma. Once ordered, I located the wire receptacle on my vehicle as indicated by etrailer video. I pulled the receptacle loose and reached the molding it was behind. When I received the controler, I mounted it in approximately ten minutes time. Extremely easy to install and anyone with any mechanical ability will be able to install with ease. I highly recommend this product. 615462



- 3040-P
by:

Great product fit perfect 615067



- 3040-P
by:

Installed on a 2011 4runner. It was relatively easy and allowed direct connection of my tekonsha brake controller. It took me a little while to find a suitable place to attach the extra ground wire. I would have appreciated more direction in this area, but it's kind of hard to provide these kind of directions for every application this plug is designed for. 613906



- 3040-P
by:

Exactly as advertised, exactly as expected. Delivery was crazy fast, packaging was perfect. Plug and play installation. It took longer to round up the tools and put them away than it did to install and get it working. 12mm socket to attach the ground wire to the pedal stud, Phillips head screwdriver to mount the bracket. -- Done and done. Buy this unit, plug it in, take a 5 minute drive to test your settings, go home and have a beer to congratulate yourself on a job well done. 613155



- 3040-P
by:

Great product no problems 610999



- 3040-P
by:

This Product worked as expected. No issues, easy to install and use. 608421



- 3040-P
by:

Great price and they shipped the correct harness the first time. 605800



- 3040-P
by:

Plugged right in to my 2012 Tundra. 604864



- 3040-P
by:

Easy to install. Plug and play is great. 604527



- 3040-P
by:

Fast shipping and amazing supporting educational materials for easy installation. 604037



- 3040-P
by:

Worked as expected. Plugged into the factory connector on my 2013 Toyota Tundra and into the brake controller. Very easy and clean installation. 603369



- 3040-P
by:

I haven’t had a chance to use this yet, but the customer service was outstanding! Greg answered all of my questions and helped me find the best product for the best price. I was very pleased with the entire process from the intial phone call to the follow up after it was delivered! 601697



- 3040-P
by:

A must if your vehicle as the plug and play port. So simple and well worth getting with the unit itself. 601522



- 3040-P
by:

Works great 597267



- 3040-P
by:

Works as advertised. 597244



- 3040-P
by:

Quality part! 594000



- 3040-P
by:

not a problem at all..... 593787



- 3040-P
by:
2005 Toyota Tacoma

Pat C was a pleasure to deal with on the phone twice. Once when I ordered the wrong part and then when I ordered the right part...this one. Product was easy as pie plug and play like she explained for my system. Great product for my 2005 Tacoma and Prodigy system 592712


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  • 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...
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  • Location of Factory Trailer Brake Controller Harness on a 2007 Toyota Tacoma with Tow Package
  • The factory harness to plug in a brake controller wiring harness on your 2007 Toyota Tacoma is located underneath and left of the steering column, taped to another harness near the emergency brake pedal. There will be a 5-pin connector that mates with the one on the adapter, # 3040-P. The harness does include an additional ground (white) wire that will need to be attached to a bare metal surface. The P2 is a proportional controller that applies the trailer brakes in proportion to how...
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Info for this part was:

Expert Research:
Michael L
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