Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
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.
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.
Today on this 2004 Toyota 4Runner we are going to be installing Prodigy brake controller along with the Prodigy wiring harness part number 90185-3040P. The first thing we want to check for in this vehicle just to make sure that the vehicle is fully equipped with the tow package and that it will have the port that we will be plugging into. A good way to check that is to come to the rear of the vehicle and make sure it has a factory installed 7-pole and not just an after market one. With that verified we can go inside the vehicle and start locating the wiring port that we are going to be plugging our brake controller into. 00:31
The port that we are going to be plugging into is located over on the driver side of the vehicle just left of the emergency brake pedal. Just above the plastic molding we can probably access the plug without removing anything however there is a ground wire on our harness that we are going to need to attach to a grounding stud. To access that we are going to need to remove a couple of pieces of molding. We need to remove the kick plate cover and then the full plastic molding over on the driver side. Now that we have got the paneling removed we can take and plug our harness in place. You can see right here is the port that we are going to be plugging our harness into. 01:09
If you follow down the harness you can see we have got a loose white wire that needs to be grounded. I do not see a common grounding stud in here however there are multiple bolts that we can use as attaching points for our ground. I think we are going to use this one right here since it is somewhere close to where our harness is located. We have got the other end of the plug here and that is going to plug into the backside of our Prodigy harness. Next we need to figure out where we want to mount the Prodigy at. It is always a good idea that you mount it in a aerial. It can be easily accessed by hand in case you need to adjust or for even for emergency braking situations. You also do not want to be in a spot where it is going to interfere with your everyday driving. On this particular vehicle unfortunately there is not a whole lot of excess room in the dash area. I think we are going to mount it somewhere right in this area here. When you are mounting the Prodigy it needs to be mounted in a straight line for the braking of the vehicle. It can not be turned to the right or left either way. Note that the Prodigy controller comes with two different mounting brackets. We have got the more traditional bracket that mounts to the Prodigy using two screws on the side which is a little bit smaller but it is a little more permanent as well. We have also got the mounting pocket which is a little bit more bulky but would allow you to easily remove the Prodigy when not in use or if you want to switch it from vehicle to vehicle. 02:34
Instead of having mounting screws on the sides it has got clips to hold the Prodigy in place. Since we are a little short on room in this vehicle we are going to use a smaller mounting bracket for our installation today. We are going to line it up and start drilling out the holes that we are going to use for the mounting. Before drilling the mounting holes you want to make sure that there is nothing behind the dashboard that you may drill in to that may damage the vehicle. When choosing a mounting location you need to take into consideration that if you are using the smaller bracket you are going to need to put in a new mounting screw in the side so you need to make sure you give yourself enough room. Next we will take our Prodigy controller and mount it into position. To provide a little bit more clearance I am going to use the upper mounting holes in the bracket. Next with our controller mounted we can just take our wiring harness and route it across over to the Prodigy where we are going to plug it in. You can see instantly with it plugged in we have got NC flashing on our Prodigy brake controller. That is indicating that we do not have a connection to a trailer. That will blink a few times and then it will go to two dots. If you have any loose hanging wires left over from our connection you want to secure those up and out of the way. Then we can start to reinstalling the interior of the vehicle. Now that we have got the interior reinstalled we are going to plug our trailer in to our 7-pole at the rear. You will see that when we do that we have a C on the display screen of our Prodigy that is showing that we now have a connection. Now when we hit our brake pedal we get digital read out on the screen that lowers when you use the slide bar. With that, that will conclude the installation of Prodigy brake controller part number 90185-3040P on a 2004 Toyota 4Runner.
Customers Who Purchased This Accessories and Parts Also Bought...
Average Customer Rating: 
4.9 out of 5 stars (38 Customer Reviews)
by: Shaun T09/19/2011
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Made install super easy. 24198
by: Jeff01/28/2011
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Well made. Ground would be more helpful on other end of cable, at least it is long. Cable is not long enough to mount controller in center console of Tundra without splicing to cable that comes with the P3. Great Service from eTrailer.6339
by: Rick A12/17/2010
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Tekonsha ebrake harness This harness was a godsend. Originally I purchased the Tekonsha for my Bmw X5 and it worked perfectly. Traded the X5 for a Lexus and was worried about the wiring. No problem! This harness was a simple plug and play. I saved a lot of time and money on this install. The installation videos made it simple and gave me the knowledge to do it myself. As usual the service was great as is the quality of product.4272
by: Roger S02/06/2012
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Item was as advertised, easy hook-up with plug & play.31155
by: Terry Z.01/31/2012
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Makes installing the controller a breeze. Installation took me less than 30 minutes thanks to the video available on the etrailer.com website.30701
by: Bill T01/27/2012
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The brake controller arrived sooner than I expected. Haven't installed it yet but am impressed so far with E Trailers Service.30461
by: Brian R01/24/2012
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I ordered the Tekonsha P3 and wiring harness on a Monday morning and the package arrived at my house on Wednesday of the same week!! As always etrailer has surpassed my expectations. I highly recommend you guys to anyone and will be back in the future to make other purchases. Thanks again30228
by: Dave01/21/2012
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This is worth the little extra expense. Save time connecting the two provided harnesses and adds reliability since there are no splices with this solution. In my case it was barely long enough for my placement preference but I was able to get it to work.30078
by: dave b01/08/2012
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the plug in wiring adaptor makes it super easy. 29299
by: dave b01/08/2012
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the plug in wiring adaptor makes it super easy. the controller could not be easier to use. i am very happy :).29297
by: Jamie L12/23/2011
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Put tape over the end that goes to the controller. It can arc if it comes in to contact with metal while routing it under the dash. 28646
by: Perry L.12/20/2011
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It was just what I wanted 28370
by: Scott12/05/2011
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Great product and arrived at the door sooner than expected. Props to ETrailer.27761
by: George P.11/27/2011
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Excellent fit and function. Plug and play is great.27423
by: Patrick M.10/27/2011
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Easiest bit of wiring I have ever performed. Plugged one end into the trucks harness and the other end into the brake control. Attached the ground to a ground and all was good with the world. Etrailer is the best too. Fantastic communication and super fast shipping. 26225
by: Mike10/15/2011
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Makes brake control insall a snap! 25610
by: John M10/03/2011
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all arrived quickly without any problems 25028
by: Tim B.09/03/2011
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Bought the interface with model specific wiring harness. Installation was a breeze. Took about an hour. Trailer company wanted $200 just for installation. Got product quickly. No hassles. 23523
by: Randy J.09/01/2011
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Just what I needed and at a good price. Like the other products I have ordered from etrailer, it was shipped quickly and I've already installed the brake controller. They do a great job of communicating shipping status.23347
by: James H.08/16/2011
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2 minute installation. Nice product. 22000
by: Tim C08/02/2011
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Good quality. Exactly what I needed. Quick Service, too (as always)20874
by: Chris R.08/01/2011
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Excellent quick delivery and the unit is plug and play in the 2010 Toyota Tundra. Thanks, Chris20641
by: Scott J07/22/2011
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Fast, fast service. Great customer service .19929
by: Rob B.07/09/2011
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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
by: darrell c.07/01/2011
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Shipping took longer than the 3 day that I paid extra for. But otherwise service was excellent, email updates were useful and appreciated.18354
by: Roger05/25/2011
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Fast processing, easy shipment tracking, and exactly what I ordered. A great place to do business!15350
by: NEIL05/23/2011
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Simple process to find the product I needed on-line, good pricing, quick shipping, and good communication through emails regarding my order. Product was also easy to install.15191
by: Ray N05/16/2011
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Installation was a snap. I didn't even have to remove the panel because the factory plug was visible above it. 14372
by: shawn05/16/2011
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great service and very nice fit form and function!!Factory correct and it made wiring the brake controller a snap.I would recommend this piece to everyone who thinks about wiring it themselves.14337
by: Steve K05/16/2011
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Worked exactly as advertised, no issues. Thank You14239
by: Paul S05/13/2011
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The wiring harness I purchased for my brake controller worked great! and... the installation video was very useful in helping me to find the brake controller hookup in my truck.13791
by: Tony B05/12/2011
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Just what I needed! 13654
by: Dale V04/08/2011
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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: D Baker04/01/2011
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Piece of cake to install. Worked as ad vertised.10886
by: Dennis C.03/29/2011
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the wire harness and brake controller pocket were exactly as advertised. Both worked flawlessly. Would purchase from etrailer.com again. Great experience, excellent service and prompt delivery. Thanks10626
by: Sam A03/11/2011
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Excellent quality, direct plug and play fit, excellent youtube install video made install extremely easy.9084
by: Brian S08/26/2009
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Plug-N-Play / '09 Land Cruiser Plug-n-play, no splicing. Worked w/ the P3 straight-away.2305
by: Jim M06/19/2007
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easy to navigate the site The connector was a perfect fit for the 07 Toyota Tundra Regular Cab and made easy work of installing the Tekonsha brake controller. I have posted the information on the Toyota Fourm that I read for others to see [..]239
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