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Tekonsha Prodigy RF Wireless Trailer Brake Controller w/ Bluetooth - 1 to 3 Axles - Proportional

Tekonsha Prodigy RF Wireless Trailer Brake Controller w/ Bluetooth - 1 to 3 Axles - Proportional

(10 Reviews)
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Trailer Brake Controller

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Tekonsha Trailer Brake Controller - TK94FR
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Proportional brake controller operates via bluetooth for simple transfer between multiple cars or trucks. Includes automatic-leveling sensor, boost feature, portable remote and continuous diagnostics. Compatible with multiplex wiring systems. Lowest Prices for the best trailer brake controller from Tekonsha. Tekonsha Prodigy RF Wireless Trailer Brake Controller w/ Bluetooth - 1 to 3 Axles - Proportional part number TK94FR can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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Tekonsha Trailer Brake Controller

  • Tekonsha
  • Electric
  • Electric over Hydraulic
  • Proportional Controller
  • Under-Dash Box
  • Dash Mount
  • Automatic Leveling

Proportional brake controller operates via bluetooth for simple transfer between multiple cars or trucks. Includes automatic-leveling sensor, boost feature, portable remote and continuous diagnostics. Compatible with multiplex wiring systems.


Features:

  • Brake controller activates trailer brakes in proportion to your vehicle's braking action
    • Automatically adjusts trailer's braking based on deceleration of tow vehicle
    • Activates immediately - no pausing like with time-delayed brake controllers
  • Wireless system is perfect for shared trailers and business fleets
    • Remote control lets you operate trailer-mounted power module from cab of any vehicle
  • Automatic-leveling ability - internal sensor detects deceleration even if controller is not mounted flat
    • Position within ± 5 degrees of level in the horizontal plane
  • 3 Boost levels let you adjust initial braking power and aggressiveness
  • Continuous diagnostic check alerts you to any potential problems
  • Integrated safeguards protect your vehicle and trailer
    • Minimizes drain on car battery when not in use
    • Prevents trailer brakes from overheating by reducing power output to them during prolonged stops
  • Digital display on remote is easy to read
  • Manual override button is built into remote
  • No hardwiring necessary for installation
    • 7-Pole connector (sold separately) on trailer plugs into 7-way socket on rear of power module
    • Wire lead on power module plugs into tow vehicle's 7-way connector
      • Connector on your vehicle must have an active 12V (hot) lead
    • Remote control plugs into standard 12V accessory outlet in cab
  • Compatible with tow vehicles that have multiplex wiring systems


Specs:

  • Application: trailers with up to 3 axles (6 brake assemblies)
  • Power module dimensions: 10-3/4" long x 4-3/8" wide x 4" tall
  • 7-Way cord length: 8'
  • Measurement of horizontal mounting holes from center to center: 9-7/8"
  • Measurement of vertical mounting holes from center to center: 2"
  • Frequency: 3.2 GHz
  • Mounting: above or on the side of your trailer's frame rail, within ± 5 degrees of level in the horizontal plane
  • Warranty
    • Power module: 15-year limited
    • Power lead: 1-year limited
    • Remote: 5-year limited


Notes:

  • Vehicles with certain late model European tow packages may require the use of a tester (TR20117 - sold separately) or another truck or SUV to pair the receiver and transmitter.
  • The Prodigy RF cannot be submerged in water.
  • The Prodigy RF is not compatible with electric over hydraulic brakes.
  • The Prodigy RF cannot distinguish between hazard lights and brake lights. If you turn on your vehicle's hazard lights while towing with this controller, your trailer brakes will pulse.


Proportional Braking

With a proportional brake controller, you can get heavy-duty emergency braking, general braking or slow-to-an-idle braking for your trailer automatically. The intensity with which your trailer brakes are activated and the rate at which they are applied are dependent on the deceleration of your tow vehicle. This means that, unlike time-delay controllers - which send the same amount of preset power to your trailer brakes every time - proportional controllers are able to adapt to every braking situation differently. So, if you slam on the brakes in your truck, your trailer brakes will activate with that same extreme intensity. And if you merely slow down as you approach a red light, your trailer will gradually brake in the same manner. Just set the initial power level, select a boost setting, and you're good to go.


As long as the Prodigy RF controller is mounted correctly, it will sense - via an internal inertia sensor - how your tow vehicle brakes. This inertia-based sensor responds to the deceleration of your tow vehicle as you brake by signaling the controller to send out enough power to your trailer brakes so that they are activated with an intensity that matches. The result is uniform braking across your towing setup. No push-pull action - just smooth, proportional braking every time.


Wireless Bluetooth Transmission for Portability

The Prodigy RF is perfect for anyone who has multiple tow vehicles. There's no hardwiring necessary. Just plug the 7-way lead on the control module into your vehicle's 7-way connector and plug the 7-way on your trailer into the port at the rear of the RF so that the braking signal can be transmitted from your vehicle to your trailer. Then plug the remote into your vehicle's standard 12-volt accessory outlet and use it to control the module wirelessly.


Because you don't have to wire the Prodigy RF to your vehicle, the trailer that you mount the module to can be easily shared among multiple tow vehicles. As long as your vehicle has a 7-way connector, you can use the Prodigy RF. This system is also compatible with vehicles that have multiplex wiring systems precisely because it does not wire into your vehicle.


Power Boost for Heavy-Duty Towing

Aside from smoother, more efficient braking, Tekonsha's Prodigy RF brake controller also offers a boost feature that gives you more initial braking power for those times when you're towing heavy loads. You can switch boost levels so that the power output to your trailer brakes automatically starts out at either 13 percent or 25 percent of the predetermined power setting.


So, if you boost the initial power so that your trailer brakes activate with 25 percent of the overall intensity at the start, the brakes will reach maximum braking faster. This is particularly beneficial if you are towing a heavy load because the intensity required to stop that load may be far greater than that needed to halt your vehicle. Therefore, sending out more initial power to the trailer brakes - and causing them to reach maximum braking faster - allows you to better control the trailer so that it doesn't push your tow vehicle before coming to a complete stop.


If your trailer weighs less than your tow vehicle, no boost is needed. But if you wish to set the boost so that your trailer leads the braking of your towing setup, you can select level B1. The following table gives an indication of when you might use the different boost levels and the power increases that they offer.


Approximate Gross Trailer WeightBoost LevelIncrease in Initial Power Output
Less than tow vehicle GVWB113%
Equal to tow vehicle GVWB1 or B213% or 25%
Up to 25% more than tow vehicle GVWB2 or B325%
Up to 40% more than tow vehicle GVWB325%

Both B2 and B3 offer a 25-percent boost in initial power. But the braking curve for B3 is more aggressive than that of B2. This means that, even though you will start out with the same intensity when using these boost levels, you will get an overall more aggressive braking experience with the higher level. So if you use B3, you will reach maximum braking sooner than if you use B2.


Safety Features

The Prodigy RF offers advanced safety features to prevent damage to various components of your towing setup. In addition to basic troubleshooting, this controller works to prevent problems before they begin. When the Prodigy RF is not in use, it will be in power-saving mode. If there has been no activity for 2 hours, then the system will go into sleep mode. Both of these modes are designed to drop the power draw, minimizing drain on your vehicle's battery.


When you stop at red lights, or any time that your truck and trailer are at a standstill with the brakes applied for more than 5 seconds, the Prodigy's "hold" feature will activate. When this happens, the power output to your trailer's brakes will be reduced to just 25 percent of the preset power setting so that the brakes will not overheat.


If ever there is a time that you need to brake your trailer separately from your tow vehicle - when traveling down a steep incline, for example - the manual override button is easily accessible on the remote control. Pushing this button engages the brakes on your trailer with full power. In addition, when you activate this override, the brake lights on your trailer will illuminate, properly warning those behind you of the braking action of your rig.


In addition to all of those safety features listed above, the RF offers diagnostics such as:

  • Open ground
  • Overload
  • Output short
  • Power loss
  • No trailer connection

Automatic Leveling and Simple Installation

The self-leveling feature of the Prodigy RF ensures that the brake controller continues to function even as you drive up steep hills or through the mountains. Simply mount the power module, which contains the inertia sensor, on your trailer tongue or frame as indicated. Some drilling may be required.


Correct Prodigy RF mounting

Note: The Prodigy RF must be mounted within ± 5 degrees of level on the horizontal plane and must be lined up so that the power cable extends toward the tow vehicle for the internal sensor to function properly.


Once the power module is mounted on your trailer and connected to your vehicle, simply sync up the handheld remote to the module as per the included instructions. Then plug the remote into any 12-volt auxiliary outlet in your tow vehicle for power.


Installation Accessories

See etrailer.com's exclusive 7- and 4-way brake-control installation kit (ETBC7 - sold separately) if you don't already have a 7-way plug at the back of your vehicle.



902502 Tekonsha Prodigy RF Wireless Trailer Brake Controller with Bluetooth - 1 to 3 Axles - Proportional

Replaces Tekonsha 902501

Item # TK94FR

Installation Details TK94FR Installation instructions

This Product Fits The Following Vehicles




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Customer Reviews

Tekonsha Prodigy RF Wireless Trailer Brake Controller w/ Bluetooth - 1 to 3 Axles - Proportional - TK94FR

Average Customer Rating:  4.9 out of 5 stars   (10 Customer Reviews)

Proportional brake controller operates via bluetooth for simple transfer between multiple cars or trucks. Includes automatic-leveling sensor, boost feature, portable remote and continuous diagnostics. Compatible with multiplex wiring systems.

- TK94FR
by:
2016 Jeep Grand Cherokee

I had essentially no room around the driver area in my Jeep Grand Cherokee for the standard mounting of a brake controller, so I thought this would be a good solution. Installation was easy. Our RV company mounted the power module on a transverse chassis beam, completely hidden from view. The remote paired quickly and easily. Once paired you simply plug it in and you're good to go. Easy to change boost. When not towing you can disconnect and stow the remote, so nothing remains in the cabin. Short of having a built-in brake controller, this is an excellent solution.



- TK94FR
by:

This is a great product. The installation was quick -- it took almost as long to unpack the box as it did to install. Directions were complete and easy to follow. I love that the remote controlling unit can store out of sight so this doesn't change the look of my vehicle's interior.



- TK94FR
by:
2017 Dodge Durango

Awesome product! Works as stated and so easy to use! Took me 10 minutes.... and I was on the road... took more time get everything out of the package and look thru instructions.. Highly recommend this product!



- TK94FR
by:

Great, efficient, NO FRILLS!



- TK94FR
by:



- TK94FR
by:
2012 Volkswagen Touareg

was on time and in good shape, great product and price.



- TK94FR
by:



- TK94FR
by:
2020 Mercedes-Benz GLE



- TK94FR
by:
2020 Ram 1500 Classic



- TK94FR
by:
2019 Ram 1500 Classic

So far this is a awesome product!!! Thank you for your help!!!


10
10

Ask the Experts about this Tekonsha Trailer Brake Controller

Do you have a question about this Trailer Brake Controller?
  • Comparing Autobrake and Prodigy RF Brake Controllers
    Both the AutowBrake part # 3430001 and the Prodigy RF part # TK94FR are excellent options for trailer mounted brake controllers. The Autowbrake is designed for more of a permanent install as it hardwires directly to the trailer's wiring and is a bit smaller. It uses what looks like a key fob too for a remote. The RF connects by plugging the trailer's 7-way into it and then it's 7-way into the vehicle's 7-way socket. It's a little easier but maybe not quite as permanent. It's a bit larger...
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  • Recommended Trailer Hitch and Wiring for 2019 Kia Sorento to Utilize Wireless Brake Controller
    For your 2019 Kia Sorento, I recommend you start with the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118583 and then add the 7-way adapter # 37185. You will then attach the white wire with the ring terminal to a bare metal ground on your vehicle frame and then use wiring # 10-1-1 to run the 12V wire (black on the adapter) to circuit breaker # 9510 and then to the positive terminal on your vehicle battery. You will not need to connect the blue or purple wire on the...
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  • How to Install a Brake Controller on a 2018 Toyota Tundra
    For starters, you are going to want to remove the three button panel to the right of the steering wheel and look for a white rectangular connector with four pins. If present this is present then we do have a plug-in option available for you in the Curt TriFlex Trailer Brake Controller part # C51140 with the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51455. If this plug is not present then your only option is to hardwire but the issue with this is obtaining the stop...
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  • Recommended Wireless Brake Controller for Easy Towing of Trailers Without Physical Mounting Required
    The Tekonsha Prodigy RF Wireless Trailer Brake Controller # TK94FR must be mounted to the trailer in a certain way in order to function correctly. It cannot be connected to the tow vehicle. A better option for you is the new Curt Echo Wireless Trailer Brake Controller # C51180 which is designed to be used on the vehicle side and can easily stow in your glove box when not in use. It utilizes Bluetooth for the remote function utilizing a downloadable app. Once paired and set, the...
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  • Does Blue Wire on 37185 4-Pole to 7-Way Adapter Need to Be Connected When Using RF Brake Controller
    I'm assuming you're speaking of the # 37185 4-pole to 7-way adapter. You won't need to attach that blue wire from the adapter to anything, just bundle it up out of the way. The Black wire needs to run to the vehicle battery, using some # 10-1-1 wire through a 40A circuit breaker like # 9510 and the white wire needs to be grounded to the vehicle frame or chassis and the 4-pole connector on the adapter needs to be plugged into the 4-pole adapter on the vehicle to access the taillight circuits.
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  • Recommended Wireless Brake controller for 2019 Ford Edge
    To get the wires through the firewall, the easiest method would be to find a grommet where a factory wiring harness passes through the firewall. Use a small knife to cut a slit in the grommet so you can pass the wire through, but be sure to verify that there isn't anything that can be damaged on the other side of the grommet when you make the slit. Or, for a wireless brake controller, you can't go wrong with the Tekonsha Prodigy RF, part # TK94FR or the Curt # C51180 Echo Wireless Brake...
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  • Bypassing Factory Brake Controller and Installing Aftermarket Model on 2018 GMC Sierra 3500
    There isn't anything like an autonomous controller that would step up if the factory controller fails. I'd simply bypass the existing factory brake controller. The GM ITBC, although it works better now than the earlier models has been problematic enough that Tekonsha who provides many of our aftermarket brake controllers has a technical bulletin that specifically addresses how to bypass the factory controller. Let's just say you aren't the only one that's had problems with the factory...
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  • 2017 Volvo XC90 Trailer Hitch and Brake Controller Recommendation
    First let's start with a hitch for your 2017 Volvo XC90. The Draw Tite hitch part # 76194 that you referenced is the way to go as it only has a visible crosstube. Now for a brake controller there's no reason you couldn't install an aftermarket one from us and not worry about it affecting any safety programs on your vehicle. I am not sure what the guy at the dealer was thinking but our controllers install totally outside of the computer of the vehicle so there would be no interference....
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  • Compatibility Of The Tekonsha Prodigy RF Brake Controller With 2017 Jeep Grand Cherokee Tow Kit
    The Tekonsha Prodigy RF Wireless Trailer Brake Controller - 1 to 3 Axles - Proportional # TK94FR is compatible with your 2017 Jeep Grand Cherokee Trailhawk with factor tow package. This controller utilizes the brake light wiring and the 12V wiring of the factory 7 way to function. This unit connects to your trailer and has a wireless connection to the handheld remote that is power by your 12V outlet in your Jeep. The remote will show you intensity, diagnostics, and has a manual override...
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  • Recommended Brake Controller For a 2014 GMC Yukon XL
    If you're not looking to drill into the dash for mounting then you'll be looking at a wireless brake controller. The Tekonsha Prodigy RF Wireless Trailer Brake Controller part # TK94FR is my recommendation for this. It mounts on the trailer and then uses a handheld remote which plugs into a cigarette lighter port so there is no drilling into the dash required. It also works on trailers with up to three axles as well.
    view full answer...
  • Installing a Brake Controller and 7-Way Connector on a 1986 Ford Bronco
    I have the solution to your problem. For your 1986 Ford Bronco, you will need the T-One Vehicle Wire Harness # 118313. This harness will allow you to connect into the your vehicle's lights by using the original wiring plugs on your Ford. No cutting or splicing of the OEM wires. The T-One connector will provide the 4-flat connector you will need to wire up the 7-way connector. You will also need the Universal Installation Kit for Trailer Brake Controller, # ETBC7. This kit will include...
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    Image 1 for
  • Will the Range of the Tekonsha Prodigy RF Wireless Trailer Brake Controller Work With Motorhome
    The Tekonsha Prodigy RF Wireless Trailer Brake Controller part # TK94FR doesn't have a specified range in feet at this time, but you will have no problem using the controller on your 43' long 2011 Holiday Rambler Endeavor. It will work very well for your application. I have attached a review video of the controller for you as well.
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  • Parts Needed to Get Prodigy RF Brake Control to Work on 2007 Toyota FJ Cruiser with 4-Way Connector
    Since your 2007 Toyota FJ Cruiser already has a 4-Way installed you will just need a 4 to 7-Way adapter, a 40 amp circuit breaker, and some wire. You only need the light functions and the 12 volt circuit to work on the vehicle side 7-Way in order for the Prodigy RF, # TK94FR, to function. For a 4 to 7-Way adapter you can use # 30717 that you mentioned. The white wire will need to be ground to the frame and the 4-Way plugged into it. That leaves 3 more wires. The black wire is the...
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  • Troubleshooting Tekonsha Prodigy RF Wireless Trailer Brake Controller on Range Rover
    If your trailer connector is working correctly on your Range Rover when you use a circuit tester like # PTW2993 and test each pin for function, then there are a couple things to consider. You know that the controller works with another vehicle and you've confirmed that the trailer connector is working as intended. So then you know there is an issue at the connection of the two. The first possible issue is that there is some corrosion causing the connection to not be ideal. Normally...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Pairing Problems with Hand Held Unit on Tekonsha Prodigy RF Trailer Brake Controller
    It sounds like there is a pairing problem between the remote and the unit itself that mounts to the trailer. You will also just want to double check and make sure that your vehicle 7-Way and the trailer 7-Way are wired the same as the Tekonsha Prodigy RF, # TK94FR. The pairing instructions included with the manual which I have linked for reference, must be followed exactly in order for the unit to function properly. The N.C. flashing can be because the hand held unit is not paired properly,...
    view full answer...
  • Will the Prodigy RF Brake Controller Work with a 2017 Chrysler Pacifica Touring
    The Prodigy RF brake controller # TK94FR can be used with your 2017 Chrysler Pacifica and it will not void the warranty on the vehicle. This controller installs on the trailer so nothing is being hardwired into the vehicle. In order for the RF to work the vehicle just needs to have a functional 7-Way trailer connector. That is one the RF gets its power and how it knows when the brake pedal is being pressed in the vehicle. If your Pacifica Touring does not have a 7-Way trailer connector...
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  • Wireless Brake Controller Recommendation for a 2016 Volvo XC90
    We carry the Prodigy RF brake controller part # TK94FR that would be a great solution for a wireless controller. All you would need is a 7-way connector on your 2016 Volvo XC90 that has an active 12 volt accessory circuit. You would need to start with a 4-way if you do not have any trailer wiring at all. For that you would want the part # 118683 which is a confirmed fit. From there you would want the part # 37185 to adapt it to a 7-way. You would then need to run 10 gauge wire like part...
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  • How to Install a Brake Controller on a 2018 Toyota Highlander
    I have the perfect option to add a 7-way and trailer brake controller to your 2018 Toyota Highlander and it will not require any splicing into the factory trailer light wiring so it will not void the warranty in regards to this aspect. For this, I recommend our Tekonsha Prodigy RF Wireless Trailer Brake Controller part # TK94FR which installs on the trailer and does not require any modifications to the tow vehicle. It uses radio frequency and can easily be transferred to different tow vehicles. The...
    view full answer...
  • Installation of a 7-Way and Brake Controller on 2009 Toyota RAV4 To Tow Travel Trailer
    A trailer with electric brakes will require a brake controller and a 7-Way connector on your vehicle. A 4-Way will only supply the lighting on a trailer. The 7-Way is needed to power the brake controller along with the lighting. There is no straight adapter that will allow you to go from a 4-Way on your vehicle to a 7-Way on the trailer. The Tekonsha Prodigy RF Brake Controller, part # TK94FR, can be installed on your 2009 Toyota RAV4. It will still require that you have a 7-way connector...
    view full answer...
  • Tekonsha Prodigy RF Wireless Trailer Brake Controller on 2015 Nissan Pathfinder
    The Tekonsha Prodigy RF Wireless Trailer Brake Controller, # TK94FR, will work on your 2015 Nissan Pathfinder. The listed fit on this product page is not exhaustive but includes many systems that are difficult to hardwire a brake controller, making a wireless option ideal. This Tekonsha Prodigy wireless system will work on most vehicles, but does require a 7-way trailer wiring connector. If your 2015 Pathfinder doesn't have a factory 7-way connector, I'd recommend using our Universal...
    view full answer...
  • Do I Need to Run the Battery Wire When Installing 7 Way Connector to Use with Tekonsha Prodigy RF
    Because that connection is going to be relied upon to power the Tekonsha Prodigy RF # TK94FR, you will need to run power to the 7 way connector provided by the Curt # C57672 in order to use the Tekonsha Prodigy RF # TK94FR or any other externally mounted brake controller. It's important to run this line not only to provide power to the RF outside of the trailer battery, but this line will allow the 7 way to provide an auxiliary charge to your towed trailer's battery or a source of power...
    view full answer...
  • How To Install The Tekonsha Prodigy RF Brake Controller With A 2015 GMC Canyon
    Since you said you purchased the Tekonsha Prodigy RF Brake Controller, part # TK94FR, you will not need to splice into the wiring on your 2015 Canyon. You will need to make sure your 7-way connector at the back of your Canyon has an active 12V lead. You will need to plug your trailer 7-way connector into the back of the # TK94FR power module mounted on your trailer. I have attached a photo that shows what each of the pins on a 7-way connector are used for. You can test the connector...
    view full answer...
    Image 1 for
  • Can Multiple Remotes be Paired to Prodigy RF Brake Controller TK94FR
    Yes, as long as the remote that you currently have came from a Prodigy RF unit, then you can pair any Prodigy RF remote with any Prodigy RF power unit. You will simply need to start the pairing process over again with the new remote. I have attached the installation instructions that explains how to pair the remote with the power unit. For an additional remote you'd want part # TK27FR.
    view full answer...
  • Trouble Pairing the Prodigy RF with a 2014 BMW X5
    The issue you are having is not uncommon for German vehicles. There are a few things you can try to get the unit to pair. First, If you do not see displayed what the instructions say just keep going through the steps. Sometimes, it will not display what it is supposed to but it will still work if you go through the steps to completion. If that does not work then you can try taping off the pin in the 5 oclock position at the back of the RF (where the trailer plugs into) using electrical...
    view full answer...
  • Tips for Getting Prodigy RF Brake Controller to Pair to 2016 Volvo XC90
    The Prodigy RF part # TK94FR is a great controller setup that would work well for your 2016 XC90. We have seen a few issues with pairing this controller on Volvos but there are a few work-arounds that are pretty easy to manage. Make sure that the 7-Way is fully functional on the truck by testing it using a circuit tester such as # PTW2993. First, If you do not see displayed what the instructions say just keep going through the steps. Sometimes it will not display what it is supposed...
    view full answer...
  • Can Prodigy RF Brake Controller Be Used with 2015 BMW X5
    Yes, the Prodigy RF # TK94FR can be used on a 2015 BMW X5. Sometimes German vehicles have a hard time pairing with this controller though. There are a few things you can try to get the unit to pair if it is difficult. First, If you do not see displayed what the instructions say just keep going through the steps. Sometimes, it will not display what it is supposed to but it will still work if you go through the steps to completion. If that does not work then you can try taping off...
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  • Prodigy RF Brake Controller Pairing Issues, Flashes NC After Controller Pairs
    It sounds like you have a corrosion problem on the brake output circuit on one of the 7-way connections made between the rear of your tow vehicle and your trailer. I would recommend you unplug each of the connectors (one at the rear of the tow vehicle, one that plugs in to the # TK94FR, and then the one from the trailer that plugs into the # TK94FR) and clean off the pins so that they make better contact. If that doesn't fix the problem check the grounds of the brake assemblies as well...
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  • Tekonsha Prodigy RF vs Prodigy P2 Dash-Mounted Brake Controller for Use in 2011 Kia Sorento
    Both RF- and wired-type proportional brake controllers use an accelerometer to detect braking in the tow vehicle in order to send a proportional brake signal to the trailer brakes. These are often preferred over the time-delay type which apply the same user-determined preset braking power no matter the amount of braking applied in the tow vehicle. You might refer to the linked article that reviews these and other brake controller characteristics. Proportional controllers such as the...
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