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Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector

Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector

Item # 22116
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Tekonsha Trailer Hitch Wiring - 22116
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Replace the 7-way, RV-style trailer connector on your vehicle with this T-One harness. ModuLite reduces strain on wiring system. Brake controller adapter splices into your vehicle's wiring when installing your electric trailer brake controller. 1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number 22116 or order online at Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (15)
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Tekonsha Custom Fit Vehicle Wiring - 22116

  • Custom Fit
  • Trailer Hitch Wiring
  • 7 Round - Blade
  • Converter
  • Tekonsha

Replace the 7-way, RV-style trailer connector on your vehicle with this T-One harness. ModuLite reduces strain on wiring system. Brake controller adapter splices into your vehicle's wiring when installing your electric trailer brake controller.


  • Towing prep kit replaces damaged factory 7-way, blade-style trailer connector at the back of your vehicle
    • Enables your truck to power your trailer's signal lights
    • Compatible with 4-pole, 5-pole, and 6-pole adapters (sold separately)
  • T-One connects quickly and easily
    • Plug into connection points behind tail lights
    • Run body harness up to car battery
  • Included tail light converter ensures that your vehicle's wiring matches that of your trailer
  • Wiring adapter eases installation of your electric brake controller
    • Wire end splices into your vehicle's wiring
    • 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)
  • 1-Year limited warranty

Installation of Tekonsha T-One Connector

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness. Once you've plugged in the T-connector, run the body harness up to your car battery and connect the wires per the included instructions.

T-One Connection Location Points Behind Tail Lights

Once installation is complete, the 7-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.

It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 7-pole connector itself - to help prevent corrosion.

ModuLite Powered Tail Light Converter

A ModuLite power module is built into this T-One connector. Because most trailers run on a 2-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's 3-wire system need to be combined so they are compatible with the wiring system of your trailer. This power module functions as a tail light converter to combine the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.

With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.

Installation of Tekonsha Brake Controller Adapter

This adapter splices into the 4-pin connector on your vehicle's built-in brake control wiring harness. The harness is located to the left of the steering column, through a grommet in the engine compartment.

This adapter is designed to plug directly into your electric brake controller after splicing into your vehicle's wiring. You can unplug and remove your brake controller at any time and securely stow it away.

22116 Tekonsha Replacement Harness with Brake Control Adapter for Factory Tow Package - 7 Pole - Modu-Lite

Installation Details 22116 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector - 22116

Average Customer Rating:  4.6 out of 5 stars   (15 Customer Reviews)

Replace the 7-way, RV-style trailer connector on your vehicle with this T-One harness. ModuLite reduces strain on wiring system. Brake controller adapter splices into your vehicle's wiring when installing your electric trailer brake controller.


The kit, along with the video on how to install it, works fabulously. The videos are just gold to a DIY-er like me. Beware of how difficult Ford makes it to get to the tail light wiring, though. The video shows installation of the kit in a cargo van, where the tail light access turns out to be fairly simple, but the passenger version requires removal and displacement of multiple panels and the floorboard. I have added some photos to illustrate for my 12-passenger 2018 Transit 350 XLT. I will say that this etrailer solution is MUCH cheaper and less intrusive than trying to use the factory-installed system. It turns out that even if you have the wiring installed, and I think *all* models have the harness to at least the rear axle, it still takes reprogramming the computer, replacing the center console, installing a controller, and losing your cup holders, in addition to buying the remaining wire harness, etc. It took me about 4 hours to complete.

No problems, still works as advertised. One thing I didnt say in my original review, but realized others wrestled with as I read other reviews, is that the first kit I got turned out to be an HD model-the pins didnt fit the tail lights. I see another reviewer that thought they were just wrong and cut them off, but actually Im guessing he had the wrong model. I returned the original one and got the correct one, but noted to the eTrailer agent I talked with that you couldnt easily tell the difference by looking at the web site.
Tim H - 01/22/2022

2022 Ford Transit T350

We ordered the wire harness kit that was supposed to come with the 7 way plug. When the items arrived the 7 way plug was not in the box with the wire harness. I called to inform them of the mistake and let them know we needed the 7 way plug asap since we scheduled the job in and now we are behind on the repair. They would not expedite the replacement order even know they are the ones who forgot to send everything. At the end of the day my customer was disappointed in the delay as was I.


After installing the wire harness that only took a few hours I put it to use and in the past year have had no problems with it. The instructions were very well done. I am very pleased with this product.

I have been using this wiring harness quite often in the past year and have had no problems I sure like it a lot
Peter A - 04/11/2022


Customer service was above exceptional. Couldn’t find the right connector for vehicle and Bailey found it! Great employee and knows the products

2016 Ford Transit Connect

Installed on a 2016 Transit 350.

quality of this kit is pretty good, but there are two things that are problematic.

First and most important, the connectors for the factory harness to do not line up with the actual Ford factory connectors in the taillights. I had to cut off one side of the prongs that should slide into the factory connector. Be sure to check first as only one of them is off - line it up and it will be obvious which one is off.

Second, if installing this on a Transit without a factory harness there is no way for you to attach the 7 pin outlet. Does not come with the metal bracket to attach the outlet to your bumper. The length of the socket isn't going to allow you to really drill a hole and mount in the socket in the plastic.

Last, there is a small box that goes in the drivers side cavity at the rear tailight that also has a ground wire attached. The length of the ground wire pretty much means you need to place it at the bottom of the cavity. They could lengthen that 6 inches so you can zip tie it high up in the cavity, but this is minor compared to points 1 & 2 above.

Pay attention to the diagram for insetting the wires into the socket. Really easy as long as you orient it properly. They click in so don't force them - twist until it lines up.

In the end it is cheaper than the Ford harness and a bazillion dollars less than letting Ford install it.


Installed as expected with the exception of a missing part. I thought it was all inclusive but the bracket for the 7-way plug is not included. Got to the end of the install and realized it was missing and had to go back and order the bracket. Not a big expense but wish it was included so project can be completed.


We ordered our trailer lighting kit on a Monday had it shipped over night and received early Tuesday. We had the trailer working properly in 2.5 hours. The kit was easy to install and everything worked perfectly.


Since we Installed Brake controller, We have towed the boat across the country without any issues. Installation was simple.


Great people to deal with, helpful and knowledgeable, great prices, delivery, what more can you ask for from a company today???


Thank you very much. You guys are awesome. Also, video tutorials are really helpful.


Easy to install in my driveway. Works perfectly. Excellent phone experience during the purchase process.


I was a five star everything was Great

2017 Toyota Sienna





See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • Tekonsha Wiring Harness and Brake Controller for a 2022 Ford Transit T350
    I would be happy to help you find a wiring harness and brake controller for your 2022 Ford Transit T350. I recommend the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter item # 22116. This is a custom fit wiring harness that will provide a 7-Way Trailer Connector to your Transit van. The T-One connects quickly and easily by plugging into connection points behind tail lights. It comes with a brake controller adapter that splices into your Ford Transit T350's wiring...
    view full answer...
  • Does Tekonsha 7-Way Wiring Harness 22116 Fit Dual Wheel 2015 Ford Transit T350 HD
    Yes it will; I verified with Tekonsha that the correct 7-way that will fit your dual wheel 2015 Ford Transit T350 HD is the following: - Tekonsha OEM Replacement Vehicle Wiring Harness w/ Brake Controller Adapter - 7 Way # 22116 The # 22116 comes with everything you need to add a 7-way to your Transit, including the wiring adapter for a brake controller such as the excellent Tekonsha Prodigy P3 # 90195.
    view full answer...
  • Difference Between Tekonsha 22114 and 22116 on Ford Transit T350
    The OEM Replacement vehicle wiring harness with brake controller adapter part # 22114 is designed for 2015 - 2020 Ford Transit T350 with Single Rear Wheels and a 148" Wheelbase. While the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector part # 22116 fits the 2015 - 2020 Ford Transit T350 without the single rear wheels. You want to purchase the correct wiring harness based off of this information. Both harnesses will give you a 7-way...
    view full answer...
  • Parts Needed to Add an Electric Trailer Brake Controller on a 2016 Ford Transit 350
    I recommend using the Tekonsha # 22116 wiring harness. It installs a fully functioning 7-way and includes everything you need except the brake controller itself. Connectors plug in behind both tail lights of your 2016 For Transit 350 and then the 12 volt power wire and brake output wire are run to the front of the van. it also includes a harness to connect directly to a Tekonsha brake controller. I've linked the install details for you. For the brake controller I recommend the Prodigy...
    view full answer...
  • What is the Difference Between the Tekonsha Wiring Kits 22114 and 22116
    This is a good question, and although it seems they're exactly the same, they are designed to work with slightly different variations of the Ford Transit T350. The Tekonsha # 22114 is designed for 2015 - 2020 Ford Transit T350 with Single Rear Wheels and a 148" Wheelbase, where the Tekonsha # 22116 fits the 2015 - 2020 Ford Transit T350 with dual rear wheels. This information will help you decide which wiring harness you'll want to use on your 2016 Ford Transit T350. Both of these harnesses...
    view full answer...
  • Determining Which Vehicle Wiring Harness Fits 2020 Ford Transit T350HD XLT DRW
    You can determine if your 2020 Ford Transit 350HD XLT DRW you will need to check under the rear bumper for a black connector. If it is not behind the bumper check around the spare tire. Chances are that if you do not have the connector installed, that you do not have the factory tow package. You can also call your local Ford dealer with your VIN and they will be able to tell you every option you vehicle has. If you find your Transit does not have the factory tow package then the available...
    view full answer...
  • Installation of Curt C51180 Echo Wireless Brake Controller on 2016 Ford Transit T350
    The only functions of the 7-way that need to be active to operate the Curt # C51180 Echo Wireless Brake Controller are the right turn/brake lamp, left turn/brake lamp, running lamp circuit, ground and a 12-V feed from the vehicle battery. You won't need the input from the brake controller. To install the Echo on the Ford Transit T350 (assuming it doesn't already have a functional 7-way trailer connector), you'll want to use part # 22114 for single rear wheel models or # 22116 for dual...
    view full answer...
  • What Parts do I Need to Add a Brake Controller to a 2022 Ford Transit T350?
    For adding a brake controller to your 2022 Ford Transit T350, I recommend the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way # 22116. For the brake controller itself, I recommend the Tekonsha Voyager # 39510 or the Curt Echo # C51180. Both of these controllers are proportional controllers which means that the controller activates the trailer brakes in proportion to your vehicle's braking action. The Voyager is more of a traditional-style controller than...
    view full answer...
  • Parts Needed to Tow a Trailer with Brakes 2015 Ford Transit T350
    The Curt Trailer Hitch Receiver part # C13193, Tekonsha OEM Replacement Vehicle Wiring Harness part # 22116, and Tekonsha Prodigy P3 Trailer Brake Controller part # 90195 are all confirmed fits for your 2015 Ford Transit T350 and will give you everything you need to tow a trailer with brakes. In order to mount the 7-way trailer connector to the trailer hitch receiver I recommend using the 7-Way Trailer Connector Mounting Box part # 18159 which does not require any drilling. The hitch...
    view full answer...
  • Recommended Trailer Hitch Receiver And 7-way Connector For 2020 Ford T350HD DRW W/ High Roof
    At this time the only trailer hitch receiver offered that is confirmed your 2020 Ford Transit T350 HD DRW with a high roof is the Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2" # 75912 which has a 750lb tongue weight rating and 5000lb trailer weight rating that gets bumped up to 800lbs tongue weight and 8000lb trailer weight when using a weight distribution hitch. For a 7-way connector I recommend the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller...
    view full answer...
  • Can Factory Tow Package of 2017 Nissan Frontier Be Completely Bypassed
    We don't offer a plug and play option for a 2017 Nissan Frontier, but you could indeed bypass the factory tow package of your 2017 Nissan Frontier by hardwiring in a 7-way trailer connector. You'd begin by installing a 4 pole trailer connector, like part # 119147KIT. For a fully functional 7-way trailer connector, you'd need the # ETBC7 brake controller/7-way trailer connector installation kit. I've linked to some install overview videos for the parts I mentioned above.
    view full answer...
  • Need A Trailer Hitch And 7 Way For My 2020 Ford T350
    I suggest the Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2" # 75912. It is a no drilling required install and takes the shortest amount of time to install in relation to other hitches for this model. While you are installing the hitch that will be a good time to add the Mounting Bracket for 7-Way # 18138. This will give you a location to mount your 7-way connection point so it is out of the way and in a safe place. I recommend the Tekonsha OEM Replacement Vehicle...
    view full answer...
  • Correct Trailer Wiring Harness for 2020 Ford Transit 350 High Top Extended Length
    The only descriptor that changes the trailer wiring harness needed is whether your 2020 Ford Transit T350 is a SRW or DRW model. If your 2020 Ford Transit T350 has single rear wheels as opposed to duals, the # 118643 Tekonsha trailer wiring harness would work perfectly for you. If you have a dual rear wheel model, use # 118722, either of which would provide a 4-pole trailer connector to provide basic lighting functions to the trailer. If the trailer you'll be pulling has brakes, you'd...
    view full answer...
  • Choosing The Correct 7-Way Wiring Harness For a 2022 Ford Transit 350 High Top Extended Length
    Since your 2022 Ford Transit T-350 High Roof Extended Length is available in either a singe wheel rear axle or a dual wheel rear axle you will need to choose the correct 7-way harness. For a single rear wheel axle the Tekonsha OEM Replacement Vehicle Wiring Harness # 22114 is the correct 7-way for your Transit. This harness will include all the necessary wiring, fuses and connectors to install a 7-way on your Transit. The only thing you will need is a Mounting Bracket # 18138 to secure...
    view full answer...
  • Troubleshooting Factory 7-Way Trailer Connection on 2016 Ford Transit T350
    Because you know that your trailer cable was damaged, you will want to check each fuse that has to do with towing. You will want to check F4, F9, F12, F31, F43 as you stated, F45. Also relay F3, R8. After confirming these are good, you will want to use a circuit tester like # PTW2993 to test each function at the round factory harness just behind the connector. If you confirm the functions all work as intended behind the connector, then simply use # HM40975 or # C55774. If the factory...
    view full answer...
  • Fit of etrailer Brand e98842 Class III Hitch on 2017 Ford Transit T350
    As long as your Transit T350 isn't a cab/chassis or a cutaway chassis model, the etrailer # e98842 class III hitch would be a fit. If you'll be towing with the hitch, you'll also need a trailer wiring harness like # 118722 for a 4 pole connector or # 22116 for a 7-way. You'll also need a ball mount like # 2753 and a # 19260 for a 1-7/8 or # 63845 for a 2 inch trailer ball. I've linked to install videos that you might find helpful.
    view full answer...
  • Does Factory Plug for Trailer Wiring Exist on 2015 Ford Transit T350
    Everything that we have either plugs into a US Car Connector like what the Curt T-Connector # C55774, or it plugs in behind the tail lights like what the Tekonsha # 22114 and # 118643 do. During my research I wasn't able to find an OEM connector for trailer wiring that looked like that but it's still worth looking into. If you remove the fake plug from that connector and then use a circuit tester # PTW2979 to test the functions of the various pins on that connector then you should be able...
    view full answer...
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  • Recommended Class IV Trailer Hitch And Trailer Brake Controller For 2015 Ford Transit T350
    I would be happy to recommend you need to install a Class IV trailer hitch, 7-way connector, and the Tekonsha Prodigy P3 in your 2015 Ford Transit T350HD extended wheel base. Starting with the trailer hitch receiver the only Class IV trailer hitch we offer is the Curt Trailer Hitch Receiver - Custom Fit - Class IV - 2" # C14012 which will fit all models of the 2015 T350 as long as it is not a cab and chassis model. Moving on to the 7-way connector I recommend the Tekonsha OEM Replacement...
    view full answer...
  • Recommended Trailer Hitch, 7-way Connector, And Trailer Brake Controller For 2016 Ford Transit T350
    I would be happy to recommend everything you will need to add a trailer hitch receiver, 7-way trailer connector, and trailer brake controller to your 2016 Ford Transit T350 with the extended wheel base and high top conversion. Starting with the trailer hitch receiver I recommend the etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2" # e98842 which has a 900lb tongue weight rating and 6000lb trailer weight rating. If you use a weight distribution system the...
    view full answer...
  • 2015 Ford Transit T-350 Van Trailer Connector not Working What Should I check
    From what I understand your 2015 Ford Trasit T-350 has a connector on the back for use with trailers that looks similar to the Custer Trailer Connector part # KIT-7P-4 and you have added an adapter similar to 7-Way Round Pin to 4-Flat Adapter part # 118709 to plug your 4-way flat trailer plug into and you are getting no power to the lights at all. This sounds like a pretty common issue we run into often. That being the ground wire. This could have been damaged or has corroded at the connection...
    view full answer...
  • Parts Needed to Add Electric Trailer Brake Controller on a 2020 Ford Transit T350
    The parts you need kind of depends on what you already have for your 2020 Ford Transit T350, but I'll give you a list of all the parts you need either way. If you already have a trailer hitch and basic wiring like the T-One # 118643 (single rear wheel) or # 118722 (dual rear wheel) installed on your Transit then you need the Universal Wiring Kit # ETBC7 which plugs into your existing 4-Way and provides you with all of the connections and wiring for a brake controller. For a brake controller...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee David F
Installed by:
David F
Employee Dustin K
Video by:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Alexander C
Written by:
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