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Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers

Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers

Item # 3027-P
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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. 1-800-940-8924 to order Tekonsha accessories and parts part number 3027-P or order online at Free expert support on all Tekonsha products. Guaranteed Lowest Price 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 - 3027-P

  • 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.


  • 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 6-pin connector in your vehicle's junction box. The box is located underneath the dash, to the left of the steering column.

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.

3027-P Tekonsha Brake Control Wiring Adapter with 2 Plugs

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - 3027-P

Average Customer Rating:  4.8 out of 5 stars   (53 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.


OEM-quality product. Wires, plastic connectors, etc. seem identical to factory harness. Amy E. at eTrailer was great in helping me find the appropriate harness for my application. I wasn't sure if they'd be able to look it up so easily, but their systems are excellent - I told her I had a 2014 Fleetwood Discovery Class A diesel pusher, and she pulled up this p/n immediately. I technically could have used what I already had from prior owner, but I didn't like the butt-splices from the factory pigtail to the existing brake controller pigtail. For $15, it made sense to me to eliminate those splices and be "full factory." I used my terminal pin removal tool to remove 2 currently-unused stubs (key-on, and illumination?) from factory pigtail and transferred them to this new harness. That way, I have direct access to these OEM-supplied wires for any future accessories that may need them.

Still working like a champ a year later. Very please with this product.
Danny - 11/17/2021


Plug and play wire harness and controller was an easy install
Thank you


Plug adapter works great and easy to hook up plug and play as they say.

Randy - 03/03/2022


etrailer is very reliable for getting the orders out in a timely manner. The website is very easy to navigate and there are always explanations about products so you can verify that you are getting the proper product for what you need.


Came in a day early! Exactly as described. It was suggested by other from a Forum and they were right. Plugged right in and easy to mount. I far from home and the person from etrailer walked through order and assured me I would get it drop at the park I was staying at. He was right and made it a day early. All tuned and ready to pull


Great service! Very helpful and informative on their items they carry. I dealt with Kimberly R. And she was amazing. She knew the products she was selling. There the place to go to!!


We were attending the rally in Sturgis SD and were trying to add a brake controller to our RV before leaving thru the mountains again. We determined the right wiring harness, and were recommended by Tekonsha to contact etrailer for the harness. I spoke with Stacey on the phone and explained the urgency of our need for this part. She made sure it got done ASAP and it actually arrived a day early! We had the controller installed and ready to go right on schedule.

Can't say enough about the service we received. Thanks etrailer and Stacey!!!


Installed in 2013 Tiffin 38 RED Freightliner. Was as easy as you said, just plugged in with harness #3027-P.


Fits 2019 Winnebago Forza 38F. Works p erfectly.


I clicked on the button to attach to the factory connector (with Factory Tow Package) on the RV, and it added an adapter to the order. I did not see in the installation notes that you still needed to buy a second adapter to actually make it work. I would think that if you were going to create a package that connects to the factory tow package it would have everything you need. Based on the way this is built I would bet that there is no single adapter from Tekonsha that would function without a second adapter. Seems like a marketing strategy to get more money out of people. For me I paid about xx dollars for a x dollar connector and a few feet of wire, and I still had to do my own wiring. I would not recommend anyone to buy the adapter, it is truly a waste of money and will not do what you expect. Also if you decide to buy both adapters to make it work you are paying about $xx for about $xx in parts, about %xx of the cost of the unit just for a wire with connectors.


The trailer and Vicki have always come through for me. Thank you once again Vicki.


This wiring harness adapter was used to connect to my motorhome - Freightliner chassis wiring harness connector and my Tekonsha brake controller with a GM connector. It was a plug together and go! No cutting wires or personal adaption needed!!!!

No problems at all.
Ernie - 10/15/2019


Great service, Fast shipping. Thank you.


it worked great.


I called several camper sells trying to found a brake control for my motorhome, Freightliner chassis, had no luck. Called etrailer and they knew exactly what I needed, very professional.


Very helpful in selecting the equipment I needed for my motorhome. I have purchase from etrailer numerous times and all my transactions have been a breeze. Great folks to deal with.


This adapter works great! Easy! Anyone could hook it up! The Tekonsha controller works great too! I pull a 24’ inclosed trailer with my race car in it, weighs 8,200 pounds behind a 32’ Winnebago Journey and couldn’t be happier! Thanks


Have had this cable and Tekonsha controller in our RV for over a year. We put on roughly 10,000miles towing an enclosed trailer. This cable made the installation of the brake controller a breeze. I think the entire install took less than ten minutes.


etrailer always has the right parts for the job!


Fit into the existing harness perfectly.

2004 Freightliner XC-Series

Product was as described, well made, fit well and include more than enough wire length. NOTE: CHECK VEHICLE WIRING ... In my case the chassis wire connector was not wired properly. It did not match the chassis manufacturer's wiring diagram and sent the power to the wrong pin-out. Checking saved the controller.

1995 Jeep Wrangler

Item was plug and play perfect fit saved $130.00 from dealers price works great.
Installed in a 2004 Freightliner RV chassis.


Very easy to install.


Great tech advice and service. Installed a brake controller in my fleetwood RV inn15 minutes with adapters. No splicing, plug and play.

2015 Winnebago Journey Motorhome

The product was an adaptor to connect a trailer controller to my Winnebago Itasca motorhome. It fit perfectly and was delivered very quickly. I have used etraier in the past and continue to be satisfied with their products and service.

Show More Reviews

Ask the Experts about this Tekonsha Accessories and Parts

  • Will Tekonsha Brake Controller Wiring Harness 3027-P Fit a 2014 Freightliner XCS Chassis
    I checked with Tenkonsha and they only show brake controller wiring harness # 3027-P as a fit for the 2004 to 2016 Freightliner SL and XC models. It is possible that they just haven't been able to test it on an XCS chassis yet. Worse case scenario is that the plug will not match what is on the XCS so you would have to hardwire it in. On the harness the white wire is the ground, black is power in, red is input from the brake switch, and blue is output to the trailer brakes.
    view full answer...
  • Brake Controller Port Location in 2017 Freightliner XC Chassis
    Tekonsha brake controller wiring adapter # 3027-P is the specified part for installing a Tekonsha trailer trailer brake controller in a 2017 Freightliner XC chassis with the tow package. Sometimes the correct plug can be hard to spot. There may be others in the same general location. The one you want is black and it should be close to the steering column. I confirmed the part and port location with my contact at Tekonsha. It will be a match for the connector shown in the linked photo.
    view full answer...
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  • Trailer Brake Controller Installation in 2013 Tiffin Allegro Red 38QRA Class A Diesel Pusher
    For your 2013 Tiffin Allegro Red Class A diesel pusher motorhome, which is built on a Freightliner chassis, you can use one of the excellent Prodigy series trailer brake controllers from Tekonsha, such as their superb P3 # 90195. This is among the easiest controllers to set up and operate, thanks to its advanced feature set which includes storable settings and a large display. If your Red is based on the Freightliner XC Series chassis you will use part # 3027-P to connect the controller...
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  • Trailer Brake Control Installation in 2007 Coachmen Cross Country RV on Freightliner XC Chassis
    The 2007 Coachmen Cross Country 389DS Class A Cummins diesel pusher motorhome is built on a Freightliner XC chassis, according to my research. For this base chassis trailer brake controller installation is simple if the vehicle has the factory pre-wired 7-way tow package. In this case the connection point for the controller, such as the user-friendly and reliable Prodigy P3 # 90195, will be under the dash. You will use wiring adapter part # 3027-P to connect the controller to the vehicle's...
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  • Installing a Brake Controller on a 2006 Coachmen Cross Country 351DS Motorhome
    The brake controller that I recommend using is the Tekonsha Prodigy P3 # 90195 as it is one of our most popular brake controllers. The reason being that it is very easy to use, it doesn't require you to remember codes, the LCD screen make navigating different options very easy, plus it allows you to store settings if you have different towing applications. To install this on your 2006 Coachmen Cross Country 351DS (which is on a Freightliner XC chassis) you can use the plug-in adapter part...
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  • Prodigy Trailer Brake Controller for 2014 Thor Palazzo Motorhome
    Since your motorhome is built on the XC chassis that has a factory 7-way setup,with the blue brake circuit wire already run for you, I suggest the Prodigy P3 Proportional Brake Controller # 90195 along with the mating wiring adapter harness # 3027-P. The harness allows quick installation at the port under the dash. You will want to find the square connector that will mate with the one in the photo, which is on one end of the adapter.
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  • Recommended Brake Controller For Fleetwood Excursion
    I recommend our Tekonsha Prodigy P3 Trailer Brake Controller # 90195. This brake controller can control up to one to four axles of trailer brakes. This is an ideal solution for towing small trailers, all the way up to large trailers. Being a proportional brake controller, it'll give you the braking power relative to the braking power that's being applied in your Fleetwood Excursion that's doing the towing, so your trailer stops evenly and smoothly behind you. If you need 7-way wiring to...
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  • Recommended Brake Controller and Harness for 2011 Tiffin Allegro Bus Motorhome
    Based on my research your 2011 Tiffin Allegro Bus Motorhome is built on the Freightliner chassis. If this is the case and if it is equipped with the factory tow package (there is a 7-Way connector at the rear bumper) then the Tekonsha Prodigy P3 Brake Controller # 90195 that you were looking at is an excellent choice and you just need to add the Plug-In Harness # 3027-P to allow for a completely plug-and-play installation. One end of the harness plugs into the P3 itself and the other...
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  • Selecting and Installing a Brake Controller for 2009 Coachmen Cross Country
    The Tekonsha P3, # 90195, is a great brake controller. It is a proportional controller which means it applies the brakes as hard or as light as the motor home is braking. This is the safest way to stop and it reduces wear and tear on the trailer and vehicle. I have linked a video review of this controller for you. From my research I have found the Coachmen Cross Country is on a Freight liner XC-Series Or SL Series so you would need this adapter. Installation for the trailer brake controller...
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  • Brake Controller Port Location On a 2019 Thor Venetian
    The brake controller port on a Freightliner XC Chassis should be located underneath the dash and left of the steering column. There will be a 6-pin connector that mates with the one on the adapter harness. Once you find this, I recommend the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers part # 3027-P for plug and play installation of the Tekonsha Prodigy P3 Trailer Brake Controller part # 90195. Please note, the plug can be tapped to other wires or even have a dummy plug...
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  • Does Prodigy P3 Brake Controller Plug into 2013 Tiffin Allegro With Powerglide Chassis
    To install the Tekonsha Prodigy P3 Trailer Brake Controller # 90195 on your 2013 Tiffin Allegro Bus you will need to hardwire it in as there is not a port that allows it to plug in. We have previously confirmed with Tiffin that there will be four wires under your driver's side dash that have butt conectors on them, and you will use these to wire in the Prodigy brake controller. The wires from the Prodigy are going to be Black for power, Blue for brake controller output, Red for stop light...
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  • 2016 Newmar Ventana Trailer Brake Controller For Existing 7-Way Trailer Connector
    For your 2016 Newmar Ventana with the Freightliner XC chassis, the Prodigy P3 # 90195 you asked from is an excellent choice with easy to use features and no codes to decipher. Because you have the 7-way if it came from the factory you would simply use the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers # 3027-P.
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  • Installing a Trailer Brake Controller On 2021 Thor Venetian F42 Motorhome on Freightliner XC Chassis
    I was able to locate a Thor Publication that does show that Freightliner does provide the harness on your 2021 Thor Venetian F42 motorhome. I have included a picture of what this connector looks like as it is different and has 6 pins rather than just the 4 pins that a brake controller like the Tekonsha Prodigy P3 # 90195 will use. You can use the Tekonsha Plug-In Wiring Adapter # 3027-P for connecting to the factory plug that is under your dash near the parking brake pedal.
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  • Wiring Adapter Needed To Install Tekonsha Prodigy P2 Brake Controller On 2009 Winnebago Journey 34Y
    The Tekonsha Plug-In Wiring Adapter # 3027-P will plug into the factory port on your 2009 Winnebago Journey 34Y motorhome. This will allow you to connect to the Tekonsha Prodigy P2 Trailer Brake Controller # 90885 without splicing any wiring.
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  • Does Tekonsha Brake Controller Adapter 3027-P Fit 2016 Freightliner XC Series
    Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers # 3027-P is indeed a confirmed fit on the 2016 Freightliner XC Series chassis on which your Tiffin Phaeton is built. I checked with my technical contact at Tekonsha who confirmed it will work for you to install a Tekonsha trailer brake controller such as the excellent Prodigy P3 # 90195 or the similar P2 # 90885 proportional brake controllers.
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  • Recommended Brake Controller Plug-In Adapter for 2009 Fleetwood Discovery on Freighliner Chassis
    The Tekonsha Primus IQ Trailer Brake Controller # TK90160 referenced in your question will work great on your 2009 Fleetwood Discovery RV. This is a really nice proportional controller that will activate the trailer brakes at the same time and with the same intensity that you apply to them in your RV. If the Freightliner XC Series chassis has the pre-wired, factory tow package with a 7-Way connector, you will just need to add the Plug-In Adapter # 3027-P. This adapter will connect to the...
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    I recommend the Tekonsha Prodigy P3 Trailer Brake Controller # 90195 for your 2017 Coachmen Sportscoach 407FW. This will connect to the factory wiring port on the left side of the steering column with a Tekonsha Plug-In Wiring Adapter # 3027-P. I have included a picture for you to reference the plug location.
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  • How Does Redarc Tow Pro Elite Install with 3027-P Harness
    This is a good question but the Redarc Tow Pro Elite # RED44FR does install with the part # 3027-P but you have to cut off the black connector and then wire the colors to the brake controller wiring color for color. We don't have a Redarc connector that matches so this is best option and still makes install much easier.
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  • Brake Controller Adapter for Tekonsha Prodigy P2 on 2019 Thor Palazzo with Freightliner XC-S Chassis
    The Tekonsha Plug-In Wiring Adapter # 3027-P or 3027 are actually the same but they are only confirmed to fit 2004 - 2016 Freightliner, XC Chassis. To install your Prodigy P2 # 90885 you'll need to splice the connections using a universal pigtail like # 7894 since there isn't a plug and play connector option for the 2017 or newer Freighliners. Another option would be to use the Curt Echo brake controller # C51180, instead. This mobile brake controller does not require you to test or splice...
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  • Will Curt C51180 Echo Wireless Brake Controller Work on 43 Foot Diesel Pusher Class A Motorhome
    A large motorhome with interior partitions is the one situation where a wireless brake controller won't work well for you. The partitions and distance involved would prevent a wireless controller like the Curt # C51180 Echo from being reliably effective. I'd recommend going with a traditional wired brake controller like the Tekonsha Primus, part # TK90160. From my research, I found that the 2020 Newmar Dutch Star could either be had on a Spartan or a Freightliner chassis. Both have a...
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  • Recommended Brake Controller For My 2006 Itasca Meridian Motorhome
    If you want to tow a trailer or use a tow dolly with your 2006 Itasca Meridian Motorhome, you will need a brake controller. My brake controller recommendation is the Redarc you inquired about. It will consist of the following items: Redarc Tow-Pro Elite Trailer Brake Controller - 2 Braking Modes - 1 to 3 Axles - Proportional, part # RED44FR Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers, part # 3027-P This brake controller comes with a custom wiring harness. It is a proportional...
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    Yes, we do have a brake controller for your 2005 Fleetwood Revolution LE 40L motorhome. It is the the Tekonsha Prodigy P3 Trailer Brake Controller item # 90195. This is a proportional brake controller that activates your trailer brakes in proportion to your motorhome's braking action. It automatically adjusts the trailer's braking based on deceleration of your vehicle. If you have the factory towing package on your motorhome you will want the Tekonsha Plug-In Wiring Adapter for Electric...
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Info for this part was:

Employee Lindsey S
Edited by:
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Employee Michael H
Expert Research:
Michael H
Employee Adam R
Expert Research:
Adam R
Employee Cole B
Installed by:
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Employee Alexander C
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