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Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers

Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers

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Accessories and Parts 3066-P - Wiring Adapter - Tekonsha
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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. 1-800-496-5010 to order Tekonsha accessories and parts part number 3066-P or order online at etrailer.com. Free expert support on all Tekonsha products. Great prices and Fastest Shipping for Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers. Accessories and Parts reviews from real customers.
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Tekonsha Accessories and Parts

  • Trailer 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.


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)
  • Limited 1-year warranty


Installation of Tekonsha Brake Controller Adapter

This adapter plugs into the 4-pin connector on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash. Pull back the carpet behind the brake pedal to expose the connector.


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.



3066-P Tekonsha Brake Control Wiring Adapter with 2 Plugs

Item # 3066-P

Installation Details 3066-P Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - 3066-P

Average Customer Rating:  4.8 out of 5 stars   (31 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:
2015 Mercedes-Benz M-Class

I'm going to skip the reviews for Item #3066-P Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers and for Item #331-TPH-017 Redarc Tow-Pro Wiring Adapter for Tekonsha Brake Controller Harness. They just work to get the signals from A to B.

Installing this in my Merc ML-250 Bluetec was straight forward, but I thought quite a bit about the knob placement. Finally ended up mounting this next to the ashtray, opposite of the cigarette lighter. This location won't work for those with heated/cooled cupholders as this is the location used for that controller. This location works well for mounting as there is clearance below and the knob is low-profile enough that the sliding door can still cover the area. Just need to be careful with wire routing. Route towards the back of the car, then reverse course up to the front, such that the slider can retract into this space. The main body of the unit is mounted under the dashboard above the brake pedal, completely hidden from view and out of the way of feet and knees.




by:

Fit perfectly into our 2020 GLS 580 and into our 2020 VS30 Sprinter 2500, both with a Mercedes factory trailer hitch. Greatly simplifies the installation.




by:
Mercedes-Benz

I installed the Tekonsha P-3 Trailer Brake Controller in my 2015 Mercedes GL450 in the summer of 2021. The brake controller has worked flawlessly. We pull a new 7,200 lb RV with 600 lb tongue weight. There is plenty of power with this vehicle, but the load does max out our vehicle's rated hitch weight and towing capacity. Installation of the controller was very simple to do and the information provided on etrailer's website was great for knowing what items to purchase. As for Mercedes, that was a different deal as there doesn't seem to be a lot of good, consistent information on where the trailer brake wires were hidden in the vehicle and the actual configuration of the installed wire connector configuration as several different configurations are apparently in existence. Nevertheless, I got lucky and had the simplest configuration where the factory connecting wires were under the dash by the steering wheel, as opposed to somewhere under the rear carpeting. Total install time was about 20 minutes and the unit fired right up. Settings and adjustments are very simple. This was a good purchase in my mind and I'd definitely buy it again.




by:

Worked just as it said it would. Connects my Mercedes’ towing package wiring directly to my controller. Plug and go!




by:
2018 Mercedes-Benz GLS-Class

Fit perfect in my 2018 MB GLS AMG edition. Simple plug and play with the electronic brake controller. Worked perfect after I hooked it up. Just used some zip ties to keep all wires nice and organized.


Comments
One year later Still working great. No issues. Buy this will confidence.
Clint - 07/15/2021


by:
2018 Mercedes-Benz GLE

Works great as designed, easy install on 2018 MB 350 with factory tow. Cable was long enough to connect under dash by the brake pedal and snake around under center dash.




by:

I had ordered for the wrong year vehicle. Unfortunately didn’t try to install it until after return policy expired. Still brand new & in the boxes, same exact model still being sold online, but they would not allow the return. Very disappointed.
Still have it unopened.




by:

your Great!




by:

etrailer came through again. I think they really do their homework on the products they offer as I have used them many times now. I do still suggest improving their listings (every company) as the whole internet sales thing is lacking everywhere. It should be better than shopping in person. More info and often it would help to show the product in use. imho




by:
Mercedes-Benz

To Dena, my order for Mercedes GSL Class connected perfectly to existing factory tow package pre-existing wiring. Have not tried out controller with RV yet, but are planning to on 3/29/20-camping trip. I was first told by local installer that my ONLY controller option was the Bluetooth set up. I am so glad to have you as my go to FOR rv-trailer needs. Shipment was very timely. Thanks so much, Ray K




by:
2013 Mercedes-Benz M-Class

After reading what I could find online, I was searching for a brake controller for my vehicle. I ran across etrailer and found their prices to be competitive. I emailed with some questions specific to my vehicle and fully expected a several day wait for my answers. Within hours I had received a response from a real person, Madison P. He was extremely knowledgeable and helpful. I purchased the unit and it was delivered 2 days later. Super service!!




by:

Wow! What an easy install. Plug this in. Plug in the brake controller. Done. The instructions even told me where to look for the plug on the car side for my model vehicle.




by:

Very simple to install. Have not hooked to trailer yet.




by:

Exact fit and function for true plug-and-play function. The quality is good and the length is more than long enough to reach from the factory connection behind the GLE350 brake pedal over to where I mounted the electric brake controller. The vehicle connection end even matches the green color to help color-code the connections.
This is the only source for this that I found at the time I purchased it and so long as the brake controller has a standard connection it should work with any brand.




by:

Worked just as advertised, couldn't be happier


Comments
Perfect, no issues
Graham - 12/18/2021


by:

Fit ML 350 harness as OEM product.


Comments
Great product. Needed the factory harness to simplify the controller installation to the OEM on board connector. Works as advertise.
marcel d - 03/11/2021


by:

I like this brake controller. It is easy to set up and adjust. Only gripe is I can't get it exactly set so that the trailer doesn't jerk when braking at low speeds.




by:

Excellent product. It connected directly to my 2019 GLS 450 factory harness and installed in five minutes. It’s my second time purchasing this product.




by:

Worked as described, fast delivery.




by:

Bought Draw-Tite Activator IV for a 2018 Mercedes GLS. Installed with Tekonsha 3066-P harness. The Tekonsha harness plugged into the Mercedes pre-wired harness easily. The Draw-Tite was easy to install and works perfectly.




by:
2015 Mercedes-Benz GL-Class

Easy to install. Connected right to the OEM plug and to the plug on the brake controller. Works as advertised.




by:

Easy set up. Works great. Etrailer is awesome to deal with.




by:

Exactly what I needed! Thanks!




by:

They have just about everything related to trailers. Easy to use website. A+




by:

plug-n-play, super easy



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31
Show More Reviews

See what our Experts say about this Tekonsha Accessories and Parts

  • Best Trailer Brake Controller for 2014 Mercedes-Benz M-Class
    Yes, we recommend the Tekonsha Prodigy P3 Trailer Brake Controller # 90195 for your M-Class often. If your vehicle has a 7-way trailer connector the installation will also require the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers # 3066-P. Installing the P3 consists of only mounting the main unit on the trailer, plugging in the hand-held display in the passenger compartment and pairing the two. The linked video will show you the P3 installation process in another brand...
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  • Plug and Play Brake Controller Harness for 2015 Mercedes-Benz GL-Class
    The Tekonsha Prodigy P2 # 90885 works for your 2015 Mercedes-Benz GL-Class and the wiring adapter you need is part # 3066-P. There are instructions included with the products to help you locate the plug under your dash. The plug is located in your foot well on the drivers side, there might be a plastic cover covering the connectors. I have attached a review video for you to learn more about it.
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  • Parts Needed to Install Prodigy P3 # 90195 in 2017 Mercedes Benz GLE
    The Prodigy P3 part # 90195 is a really great controller and would be what I would recommend highly for your 2017 Mercedes Benz GLE and all you'd need to install it is the part # 3066-P and you'd be set. No other changes would need to be made.
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  • Activating Brake Controller/Trailer Connector Feed on 2016 Mercedes-Benz GLE 350D Coupe
    I'm assuming that you've already installed the Tekonsha P3 # 90195 and it's not powering up, is that correct? You'll want to first ensure that you're using the correct brake controller wiring adapter, part # 3066-P which is compatible with Tekonsha and Draw-Tite brake controllers. If you're using the correct brake controller wiring harness, the most likely reason the controller isn't powering up is a missing fuse. I've looked at the owner's manual, which states that in the fuse box under...
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    When it comes to installing a brake controller on your 2019 Mercedes Benz GLE with a tow package, I recommend The Tekonsha Voyager Trailer Brake Controller - 1 to 4 Axles - Proportional # 39510. Since your vehicle already has the 7 pin it does have an active brake line to run to the controller, but it wont carry the signal without the controller. This controller can be mounted within a 90-degree vertical range, so you can mount it away from your knee. With your trailer only being 5,000...
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  • Recommended Brake Controller For A 2016 Mercedes GLE 350
    When it comes to installing a brake controller on your 2016 Mercedes-Benz GLE if you have the factory tow package already installed in your vehicle then you will only need the following items: Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional # 90195 Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers # 3066-P The proportional brake controller automatically levels when mounted within a 360-degree vertical range, it also includes a customizable LCD...
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  • Where Is the Brake Controller Plug On a 2016 Mercedes-Benz GLE 350
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    It's difficult to say, having not seen what you have going on in person but if I had to hazard a guess, I'd say that you're using the wrong brake controller wiring harness. To install the # TK90160 Tekonsha Primus in your 2012 Mercedes ML350, you'll want to use the # 3066-P wiring harness. This would explain the fuse popping as soon as the controller is plugged in.
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    For your 2023 Mercedes Benz GLE 53 the Redarc Tow Pro Elite part # RED63RR can be used with the install harness part # 3066-P which plugs in under the dash of the vehicle.
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  • Plug-In Adapter for Installing Tekonsha Prodigy P3 on a 2016 Mercedes-Benz GLE-350
    The answer page that you are referring to was actually completed a few years ago and at the time nobody had a plug-in option for the brake controller. I had contact different manufacturers and they all said that it had to be hardwired. Since then, as you have found, a plug-in adapter has been found so all you need to install the Prodigy P3 # 90195 on your 2016 Mercedes-Benz GLE-350 is the Plug-In Adapter # 3066-P. This is the option you can go with if you have the factory 7-Way. If you...
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  • Parts Needed to Install Brake Controller in 2020 Mercedes Benz GLS
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Alexander C
Written by:
Alexander C

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