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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 # 22121
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Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector Custom Fit 22121
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Replace the damaged 7-way, RV-style trailer connector on your vehicle with this T-One harness. ModuLite reduces strain on wiring system. Brake controller adapter plugs in beneath your dash and lets you easily plug in your electric brake controller. Call 800-298-1624 to order Tekonsha custom fit vehicle wiring part number 22121 or order online at etrailer.com. 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 (17)
  • Q & A (26)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 22121

  • Custom Fit
  • Trailer Hitch Wiring
  • 7 Blade
  • Tekonsha

Replace the damaged 7-way, RV-style trailer connector on your vehicle with this T-One harness. ModuLite reduces strain on wiring system. Brake controller adapter plugs in beneath your dash and lets you easily plug in your electric brake controller.


Features:

  • 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
    • 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)


Specs:

  • Maximum amperage:
    • Stop/turn lights: 4.2 amps per circuit
    • Tail lights: 12 amps per circuit
  • 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 and some interior paneling 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 plugs into the 4-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.


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.



22121 Tekonsha Replacement Harness with Brake Control Adapter for Factory Tow Package - 7 Pole - Modu-Lite

Installation Details 22121 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 - 22121

Average Customer Rating:  4.6 out of 5 stars   (17 Customer Reviews)

Replace the damaged 7-way, RV-style trailer connector on your vehicle with this T-One harness. ModuLite reduces strain on wiring system. Brake controller adapter plugs in beneath your dash and lets you easily plug in your electric brake controller.

- 22121
by:
Chrysler Town and Country

I purchased this well over a year ago along with the hitch for my Chrysler Town and Country mini van. Both arrived sooner than expected in perfect condition. The installation was done by myself without help so I really appreciated how easily this kit fit with my taillights. The only connections needed were to unplug the rear lights, plug in the harness, and add a ground screw to the body. The control cable to the front was easily long enough, and the instructions for wiring to the battery were easy to figure out. I'm sorry I can't say how well the brake system works as I ended up not needing trailer brakes and haven't used it. However the the circuit for the trailer tail lights still work perffectly.


Comments
I have used this to haul loads from Califonia to Utah and back. I smashed it leaving a steep driveway on the Oregon coast and all i had to do was bend it back into position and it works fine no damage to the plug.
Charles B - 02/04/2021


- 22121
by:

etrailer was really good to work with. I had placed my order and the shipment was lost by ups. etrailer worked with me to get my order shipped again and it arrived in a timely manner. etrailer’s customer service was very helpful.



- 22121
by:

I had done a lot of research on the best trailer brake to purchase. This one kept coming up for ease of installation and use. After 1 year I am extremely happy with my purchase. In the year since purchasing this item I had to get a new tow vehicle. Best part was I didn't have to purchase another trailer brake! All I had to do was plug it in and I was good to go. This was a great purchase. Thanks etrailer for making this purchase easy. I highly recommend this trailer brake.



- 22121
by:

I have not installed the brake controller yet so we are still still just using the light portion of the wiring. Still looks and works great! We may purchase a pop-up camper this winter/spring and if we do I hope that it has electric brakes. If it does then we will be able to offer a full review as we will need to install the brake controller. Thank you!



- 22121
by:

Easy to install. Instructions are clear and concise. Everything needed is in the package.



- 22121
by:
2015 Chrysler Town and Country

The harness size and connectors were easy to use. There is no video for this specific harness, but look up the 4-pin connector version. The install is nearly identical. Took about 3 days to receive. Use lift jacks. You're not under the van very long, but you do have to run and zip-tie a cable the full length of the van. I took off a star because the screws were missing and the ring connectors are the wrong size. These are common at any hardware store, but when you say they're already in the box, then it should be in the box.



- 22121
by:
2016 Dodge Grand Caravan

All ordered parts arrived in good condition, and were correct. Impressed with on time delivery. Hitch and wiring harness were a perfect fit. Only had trouble finding correct wire from brake light switch on 2016 Dodge Caravan .



- 22121
by:
2018 Dodge Grand Caravan

Ordered this for a 2014 Dodge Grand Caravan to tow our 2018 Coachmen Clipper 17 foot camper. It was actually a very easy install and took about an hour or so to complete. Everything worked as expected with no issue whatsoever afterward.



- 22121
by:

Easy to install and works great. Didn't really need a 7 prong but might pull a trailer with brakes in the future.



- 22121
by:

Parts were delivered on time and were excellently priced. I’ll continue to use etrailer.



- 22121
by:

I do not go anywhere else but etrailer.com. They have everything and deliver it fast. Great customer service.



- 22121
by:

Perfect, exactly what I wanted and very fast delivery!



- 22121
by:

Good



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2020 Dodge Grand Caravan



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17
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Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

  • Parts Needed to Install 7-Way and Brake Controller in 2019 Dodge Grand Caravan
    The Tekonsha 7-way that fits your 2019 Dodge Grand Caravan # 22121 comes with the missing brake controller wiring that you mentioned not finding on your 2019 Dodge Grand Caravan. So you'd wire the PowerTrac part # 39523 directly to that and you'd be set. I attached an install video for this for you to check out as well.
    view full answer...
  • Does 7-Way Kit for 2014 Dodge Grand Caravan Include Brake Controller Install Port
    The 7-way trailer wiring kit part # 22121 that fits your 2014 Dodge Grand Caravan does come with a brake controller install port like you are wanting which will provide you with an easy way to install a brake controller like the Draw Tite iCommand # 5535.
    view full answer...
  • Will the Tekonsha Vehicle Wiring Harness 22121 for a 2017 Dodge Grand Caravan Charge Trailer Battery
    The Tekonsha OEM Replacement Vehicle Wiring Harness part # 22121 which is a fit for a 2017 Dodge Grand Caravan does come with a circuit that will charge the battery on your trailer. It also has the brake output circuit as well if you are towing a trailer with brakes. In which case, you will also need a brake controller and the Curt Echo Wireless Trailer Brake Controller part # C51180 is the perfect option because it's plug-n-play. Don't forget the Mounting Bracket for 7-Way part # 18138...
    view full answer...
  • Brake Controller Recommendation To Use With 22121 Wiring Harness On 2015 Chrysler Town and Country
    The great thing about the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter part # 22121 for the 2015 Chrysler Town and Country is it does not require any additional wiring to use a brake controller. It is compatible with various Tekonsha brake controllers but I recommend the Tekonsha P3 part # 90195 which is one of our most popular, easy to use brake controllers available. The Tekonsha Prodigy P3 Trailer Brake Controller features an LCD screen for easy to read...
    view full answer...
  • 7-Way Trailer Wiring Harness that Fits 2014 Chrysler Town and Country
    The 7-Way trailer wiring kit part # 22121 that you referenced is a confirmed fit for your 2014 Chrysler Town and Country and I did attach a set of detailed instructions for this in a link down below, but we do not have an install video for this kit at this time.
    view full answer...
  • Adding a 7-Way and Keeping a 4-Way Trailer Connector on a 2015 Chrysler Town and Country
    To add a 7-Way trailer connector and retain the 4-Way you already have on your 2015 Chrysler Town and Country I recommend using # 37185 if you just want the lights to function on your Rpod. If the trailer requires 12 volt power for accessories and/or has electric brakes then I recommend using # ETBC7 instead and brake controller # 90885. I have included some links that show and explain the ETBC7 installation for you.
    view full answer...
  • 7-Way Trailer Wiring Recommendation for 2014 Town and Country
    Yes, the # 22121 that you referenced fits your 2014 Chrysler Town and Country that does not have trailer wiring and would work well. It comes with everything you'd need to install and does not require any factory wiring to be present on your vehicle. It also includes brake controller pre-wiring so if you ever wanted to install a brake controller in the future most of the work would be done.
    view full answer...
  • Adding a 7-Way Trailer Connector to a 2011 Chrysler Town and Country
    You can use trailer wiring harness # 22121 to add a 7-Way to your 2011 Chrysler Town and Country that did not come with a factory 7-Way or tow package. If you also need a brake controller I recommend the P2 # 90885 because it is easy to set up and use and it is reliable. All vehicles with automatic transmissions have some type of cooler. It is usually built into the radiator. However factory coolers are adequate at best for cooling transmission fluid so if you are towing then it would...
    view full answer...
  • Installation of Tekonsha Custom Fit Vehicle Wiring with Tekonsha Prodigy RF Wireless Controller
    The brake controller wiring portion of the Tekonsha OEM Replacement Vehicle Wiring Harness # 22121 will not be used by the Tekonsha Prodigy RF Wireless Trailer Brake Controller # TK94FR. The 12v power will already be present in the other part of the harness, so you can either leave the brake controller portion unattached or you can run it for possible future use with a dash controller like # 90195. It will not be a problem to connect the harness and run it to the dash while not using...
    view full answer...
  • Brake Controller Recommendation for 2016 Chrysler Town and Country
    There certainly is a way to install a brake controller in your 2016 Chrysler Town and Country but our brake controller manufacturers have stated that there is no brake controller pre-wiring in your vehicle so you'll have to hardwire it in. Since you have a 7-Way you will only need a few more components to complete a brake controller install on your vehicle. First let's start with a brake controller. I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling...
    view full answer...
  • Does Blue Wire on Tekonsha 7-Way Harness Need to be Run for Curt Echo Brake Controller
    The blue wire on the Tekonsha OEM Vehicle Wiring Harness # 22121 is for electric brake output to the 7-Way connector and since the Curt Echo # C51180 does not need this pin to be active on a 7-Way it can indeed just be tied off. The Curt Echo only needs the 12V power circuit (along with the basic trailer light signals) to be active on the 7-Way which as you are finding out allows for a much easier install process. I have attached a couple videos that you can take a look at as well.
    view full answer...
  • Parts Needed to Install Brake Controller on 2012 Chrysler Town and Country
    The Tekonsha OEM Vehicle Wiring Harness # 22121 that you referenced includes all the wiring and parts necessary to install a fully functional 7-Way connector and trailer brake controller. The included brake controller harness is compatible with and will plug into the Draw-Tite I-Command Brake Controller # 5535 that you also mentioned. The other end of the brake controller harness will need to be hardwired to your Town and Country. I have attached the complete installation instructions...
    view full answer...
    Image 1 for
  • Recommended 7-Way Trailer Wiring Harness for a 2015 Dodge Grand Caravan
    It sounds like you need the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter part # 22121 which is a direct plug-in 7-way compatible with a 2015 Dodge Grand Caravan. It will also require the part # 18138 for mounting. The reverse light wire from the 7-way will have to be tied into the reverse light circuit on the vehicle behind the tail lights. This is what releases the brakes while reversing.
    view full answer...
  • Can a 2014 Dodge Grand Caravan Tow a Trailer
    The 2014 Dodge Grand Caravan has a fairly high towing capacity of 3,600 lbs so you should not have any issues towing most small boat or U-Haul trailers. However, the 3,600 lbs towing capacity of your Grand Caravan will decrease if you have 3 or more passengers. For example: - 1 to 2 Persons & Luggage = 3,600 lbs Towing Capacity - 3 to 5 Persons & Luggage = 3,350 lbs Towing Capacity - 6 to 7 Persons & Luggage = 3,000 lbs Towing Capacity Also, for vehicles equipped with "Fold-in-Floor"...
    view full answer...
    Image 1 for
  • Mounting Hardware to Install Draw-Tite Class III 75579 Trailer Hitch on 2019 Dodge Grand Caravan
    The Draw-Tite Class III hitch, part # 75579 (and the other hitches available for your 2019 Dodge Grand Caravan) would install using the 3 existing M12 and the 2 M10 bolts as shown in the linked video and installation instructions. If you'll be towing with the hitch, you'll also need a trailer wiring harness like # 118534 which provides a 4-pole flat trailer connector. If you need a 7-way connector, use # 22121. For a ball mount, use # 2753 and # 19261 for a 1-7/8 or # 63845 for a 2 inch...
    view full answer...
  • Recommended Parts for Towing Camper Equipped With a 7-Way Connector With 2014 Dodge Grand Caravan
    I'd be happy to shed some light on that for you. Let's begin with a hitch, assuming you don't yet have one. I'd go with the Curt Class III # 13364 that you'd looked at. For a 7-way trailer connector, use # 22121. You will also need a brake controller if the camper is equipped with brakes. The Tekonsha # TK90160 is a reasonably priced, yet reliable, safe, easy to use and effective option. The # 22121 wiring harness provides a connector that makes the install of a brake controller pretty...
    view full answer...
  • Parts Needed To Tow a Trailer with a 2014 Dodge Grand Caravan
    The parts needed to tow a trailer with a 2014 Dodge Grand Caravan are a trailer hitch, trailer wiring harness, and ball mount/hitch ball. For a trailer hitch, the etrailer Trailer Hitch Receiver part # e98854 is what I highly recommend as it has an easy bolt-on install, hidden crosstube, and matte finish. For a trailer wiring harness, the T-One Vehicle Wiring Harness part # 118534 for a 4-way (no trailer brakes) or part # 22121 for a 7-way (trailer brakes) are excellent reliable, plug-in-play...
    view full answer...
  • Recommended Trailer Wiring Harness for a 2016 Dodge Grand Caravan
    If your 2001 Forest River Shamrock M-18 does not have electric brakes then all you will need in regards to wiring is a basic 4-way, the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118534 is what I recommend because it is plug and play and the best quality. If your 2001 Forest River Shamrock M-18 does have electric brakes then you will need a 7-way as well as a brake controller. For a 7-way, I recommend the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake...
    view full answer...
  • Recommended Trailer Wiring for a 2015 Dodge Grand Caravan
    The wiring options for your 2015 Dodge Grand Caravan all install the same way and provide you with a 4-Way flat connector for your basic lighting functions on your trailer. The only exception is the Tekonsha part # 22121 which provides a 7-Way and the ability to add a brake controller. Since your trailer doesn't have brakes it would be better to stick with a 4-Way. Out of the available options, I recommend going with the Tekonsha T-One # 118534. We have found that Tekonsha is the most...
    view full answer...
  • Trailer Wiring Harness and Brake Controller for 2014 Chrysler Town & Country
    Even if your Town & Country already has a 4 pole trailer wiring harness, the Tekonsha # 22121 is indeed the correct wiring harness for you. If you have a 4 pole in place, you can simply remove the connections where it plugs inline with the vehicle's taillight wiring harnesses and replace it with the # 22121. The beauty of this harness is that it makes it much simpler to install a brake controller. If you don't already have a controller, I'd recommend a proportional controller for safe,...
    view full answer...
  • What is Needed to Install Curt Echo Brake Controller on 2015 Town and Country Platinum Unlimited
    As long as your 2015 Chrysler Town and Country has a fully functional 7-way at the rear of it the Curt Echo # C51180 would be all you'd need and you'd be ready to tow. If you are in need of a 7-way you just want the part # 22121 as well and you'd be set since all this controller needs is a fully functional 7-way. I attached an install video for the Echo on a 2015 Town and Country just like yours for you to check out as well.
    view full answer...
  • Could Breakers of 7-Way Kit for 2014 Dodge Grand Caravan Be Replaced with Fuses
    Breakers and fuses both provide the same function as far as circuit protection with the difference being that breakers reset themselves and fuses burn out which requires replacement. If you wanted to use fuses instead of the breakers that are included with the 7-way kit part # 22121 that fits your 2014 Dodge Grand Caravan you certainly could. Using relays to provide power for the lighting and trailer brakes is fine as long as they are rated for the amperage draw they'll be encountering...
    view full answer...
  • Parts Needed to Tow with a 2018 Dodge Grand Caravan
    To tow with your 2018 Dodge Grand Caravan you need a trailer hitch, trailer wiring, and a ball mount kit. The trailer hitch that I recommend for your application is the etrailer.com # E98854. This features a 2" receiver and gives you the best ground clearance/bumper clearance which is beneficial if you end up using accessories like a bike rack or cargo carrier. If you plan on towing a smaller trailer without brakes then I recommend using the T-One # 118534 which gives you a 4-Way connector...
    view full answer...
    Image 1 for
  • Recommended Tow Package for 2016 Dodge Grand Caravan
    Your 2016 Dodge Grand Caravan has a 3,600 lb towing capacity, so you will be able to tow your 16 foot trailer and 2 4-wheelers. For your towing package, I recommend the etrailer.com Trailer Hitch Receiver - Custom Fit - Carbide Finish - Class III - 2" # E98854 which has a really nice rugged, matte powder coat finish. If your trailer has brakes, then I recommend the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector # 22121 along...
    view full answer...
  • What All is Needed to Tow a Trailer with a 2015 Dodge Grand Caravan
    The Draw-Tite trailer hitch receiver, part # 75579, is a confirmed fit on your 2015 Dodge Grand Caravan even with the Stow-n-Go seating. You don't need to purchase any hardware separately but the hitch doesn't include hardware either. The hardware is already on the van and is reused to install the hitch. I've linked a video showing the install. If you're going to be towing a trailer with your van you also need a wiring harness like the Tekonsha, part # 118534. This is a 4-way connector....
    view full answer...
  • Trailer Hitch Receiver for 2016 Chrysler Town and Country
    For the installation of the Curt Trailer Hitch Receiver # 13364 on your 2016 Chrysler Town and Country you will be reusing the bolt already in place that hold on the bumper. So you will not need to acquire any bolts unless they are missing or become damaged during removal. If you are going to be hauling a trailer or adding on a carrier that might interfere with the visibility of your tail lights then I recommend installing a 4-way plug. The T-One Vehicle Wiring Harness # 118534 will...
    view full answer...

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Info for this part was:

Employee Lindsey S
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Expert Research:
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Employee Jeff D
Installed by:
Jeff D
Employee David F
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Employee Dustin K
Video by:
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