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Brake Buddy Select 3 Portable Supplemental Braking System - Proportional

Brake Buddy Select 3 Portable Supplemental Braking System - Proportional

Item # HM39524
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Our Price: $1,431.17
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Tow Bar Braking Systems

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Product Expert Mike S

Is this right For you? Product Expert Mike S says:

Yes, if you:

  • Need to be able to switch between towed vehicles
  • Have to use a portable system, but don’t have time to waste on complicated setup
  • Like the control and convenience of being able to adjust the brake pressure from inside your RV

No, if you:

  • Want a system that doesn’t require any setup at all
  • Have limited room in your RV or car to stow the system when it's not in use
Get intense, emergency braking or steady, smooth braking in a single portable system. Easily switch between proportional or full braking. One-touch Auto Start makes setup fast and easy. Remote lets you change settings from your RV. Lowest Prices for the best tow bar braking systems from Brake Buddy. Brake Buddy Select 3 Portable Supplemental Braking System - Proportional part number HM39524 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (129)
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Brake Buddy Tow Bar Braking Systems - HM39524

  • Brake Systems
  • Proportional System
  • Portable System
  • Recurring Set-Up
  • Brake Buddy

Get intense, emergency braking or steady, smooth braking in a single portable system. Easily switch between proportional or full braking. One-touch Auto Start makes setup fast and easy. Remote lets you change settings from your RV.


  • Supplemental braking system applies towed vehicle's brakes in proportion to braking action of RV
    • Responds to deceleration of RV to activate towed car's brake pedal with matching intensity
  • Full-braking setting activates brakes in towed car with maximum power no matter how you apply the brakes in the RV
  • Braking power settings ensure that the system applies your car's brakes with the correct pressure
    • Eliminates over-braking and the damage it can cause
  • Sensitivity control lets you adjust rate of responsiveness of internal sensor
    • Low sensitivity requires intense stopping action from RV to activate brakes in towed car
    • High sensitivity allows Brake Buddy to respond to even minimal slowing of RV
  • Advanced terrain-sensing ability prevents false braking
    • System won't activate when going over bumps
  • Wireless remote control mounts in cab of RV
    • Plug into 12V accessory outlet or use with AA batteries
    • Easily check readouts for potential problems
    • Change braking modes and settings while on the go
  • Lightweight, portable system is easy to position, adjust, and remove
    • TruFit risers allow unit to sit level for optimal performance
    • Quick-Lock clevis is simple to install on almost any car's brake pedal
  • Easy-Pull harness provides power and breakaway connection
  • 15-Amp charger charges your towed car's battery while you tow
  • 1-Touch Auto Start sequence prepares braking system with a push of a button
    • Removes excess vacuum pressure from your car's brakes
    • Checks braking system for errors
  • Compatible with hybrids and other cars with electric power-assist brakes


  • Dimensions: 19" long x 11-3/4" wide x 6-3/4" tall
  • Power draw at 12V: 15 amps
  • TruFit riser adjustment range: 1" - 4" tall
  • Easy-Pull harness length: 36"
  • Weight: 12 lbs
  • 5-Year limited warranty

Note: Removing your vehicle's floor mat before installation is recommended.

Proportional Braking

The Brake Buddy Select 3 is a proportional braking system that applies your towed car's brakes with an intensity that matches your RV's braking action. The built-in inertia sensor detects when and how your rig slows down, and it then engages the actuator arm to press your car's brake pedal with an intensity that matches that slowing action.

The main unit of the Brake Buddy Select 3 is designed to activate only when deceleration is actually taking place. It is built with advanced terrain-sensing technology that keeps the unit from activating when you go over bumps in the road. As a result, your towed car's brakes won't engage unless you intend for them to engage.

Full Braking

You can also select the full-braking mode. When in this mode, the Brake Buddy will activate your towed car's brakes at the maximum preset intensity, regardless of how intensely your RV is decelerating. The full-braking setting is ideal for when you're towing a heavy truck or SUV, or if you're towing your car down a steep incline. By setting the power to a higher level, you can ensure that the momentum of your towed car won't cause it to push against your RV.

Braking Power Settings

Select Control Panel

The braking power settings determine how intensely the Brake Buddy Select 3 applies your towed car's brakes. When you're first setting up the Brake Buddy, choose a braking power based on your vehicle type. Begin with a pressure that falls into the recommended range for your towed car, as seen on the chart below.

Vehicle TypeRecommended Braking Power
Hybrids10 - 20 psi
Cars and Compact SUVs25 - 45 psi
Small Crossovers25 - 45 psi
Crossovers and Small SUVs35 - 65 psi
Mid-Size Pickups35 - 65 psi
Large SUVs and Pickups45 - 75 psi

After selecting an initial setting, press the plus or minus buttons on the actuator unit's control panel to fine-tune the power setting. The setting should be enough to cause your towed car to give a slight tug at your RV during a braking event. Braking power doesn't normally need to be reset unless you're changing to a different towed car.

Once the overall braking power is set, you can customize the sensitivity on the Brake Buddy. The sensitivity setting determines how aggressively you need to brake in the RV for the Brake Buddy to activate your towed car's brakes. If you set the sensitivity high, then your car's brakes will activate with just a light tap of your RV's brakes. Setting the sensitivity low ensures that your car's brakes will only activate when you hit the brakes in your RV with a fair amount of intensity.

Easy Remote Operation

Select Remote

The included remote control allows you to monitor or change settings for the Brake Buddy Select 3 from the comfort of your RV's cab. You can easily switch from proportional braking to full braking and vice versa with the push of a button. You can also change the Brake Buddy's sensitivity settings, which makes it easy to fine-tune the braking as you drive so that you can adjust based on feel. Finally, the remote will illuminate to alert you of any errors with the Brake Buddy system, including a breakaway event.

Powering the Brake Buddy

Instead of connecting to a 12V accessory outlet, the Brake Buddy Select 3 draws power directly from your towed car's battery. To do this, the included wiring harness connects to your car's battery. Install the harness by routing the wire end through your car's firewall and into your engine compartment. Connect the harness to your battery with the included battery wire and ring terminal.

Mount the connector that's on the opposite end of the harness in a convenient, out-of-the-way location beneath your car's dash.

Easy-Pull Harness

To connect the actuator unit to this connector, use the included Easy-Pull harness. This harness plugs into the connector below your dash, then into the braking system. When connected, the harness carries both power and breakaway functions in a single cord. And the large grip ring and wide handle make it easy to hold while connecting and disconnecting the actuator, all without ripping connectors or pulling on wires.

If you're concerned about your car's battery going dead as you tow, don't worry. The Brake Buddy Select 3 includes a 15-amp charger that pulls power from your RV to keep your car's battery charged while the Brake Buddy is connected.

Fast Setup and Universal Design

Not every car is built the same. Some have brake pedals with unusual shapes. Some have uneven floorboards or mats. These differences can make it difficult to set up a portable braking system in your towed car. But the Brake Buddy Select 3 is able to fit in almost any car on the market.

Quick-Lock Clevis

The Brake Buddy's actuator arm comes with an adjustable Quick-Lock clevis, which securely wraps around your towed car's brake pedal, regardless of the pedal's size or shape.

The clevis also comes with a quick-locking lever. Once you adjust the jaws of the clevis to fit your brake pedal, turn the lever to tighten the clevis in place. And when you're done towing, disconnecting the clevis is a snap. Just turn the lever to release the clevis jaws, and remove the clevis from your brake pedal. It's that simple.

Risers Off Kilter

Uneven floorboards can cause a portable braking system to sit at an angle in your towed car. This affects the leverage of the actuating arm, which can result in ineffective braking. Each of the TruFit risers on the Brake Buddy Select 3 actuator unit can be individually adjusted, raising or lowering each corner of the actuator unit, so that the system sits level in your car. As a result, the actuator arm is able to press straight against the brake pedal to ensure that your brakes are properly depressed every time.

TruFit Risers with Wrench

To adjust the height of the risers, twist them counterclockwise, either by hand or with the included riser wrench. Pull each riser out to match the height you need, then twist the riser clockwise to secure it at that height.

One-Touch Auto Start

Select AutoStart

The Brake Buddy Select 3 will automatically check your brakes every time you start it up to confirm that your vehicle is ready to tow. After setting up the unit in your towed car, press the Auto Start button on the unit's control panel. The arm of the unit will push and release the brake pedal several times, removing vacuum pressure from the brakes to prevent overbraking. The unit will also check for any connection errors.

39524 Break Buddy Select Three Portable Towed Vehicle Braking System by Hopkins

Installation Details HM39524 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Brake Buddy Select 3 Portable Supplemental Braking System - Proportional - HM39524

Average Customer Rating:  4.5 out of 5 stars   (129 Customer Reviews)

Get intense, emergency braking or steady, smooth braking in a single portable system. Easily switch between proportional or full braking. One-touch Auto Start makes setup fast and easy. Remote lets you change settings from your RV.

Jeep Wrangler

I looked at several supplemental braking units and wanted one that was portable with nice features like wireless monitoring and parameter changes while flat towing my Jeep Wrangler. I reviewed the videos on the etrailer site for features and installation instructions, they’re well done and really helped with my buy decision and installation guidance. I decided on the Select 3 mainly because of the option for full or proportional braking, as I live in CA and take my RV through mountain passes often. The installation was straight forward with the help of the etrailer videos, very well done. The initial testing of the unit was a bit tricky, but it worked, after leveling the unit out. The first trip with the unit was from Southern CA to Paso Robles through the “Grapevine” pass and some other large hills, the unit worked well and gave me the extra braking I needed while flat towing my jeep behind my RV. During this trip, the unit was inconsistent in bleeding the brakes upon startup. I shared this information with etrailer in detail, and they sent me a replacement unit after trouble shooting. I want to thank etrailer for excellent support of a product which I entrust the safety of my family to while in use. The new unit has been wonderful on two other trips so far. I’m very happy with the performance and ease of use for the Select 3. It just takes a few minutes to position in the jeep, activate and get going down the road after the initial install was complete, which only took a few hours to run simple wiring. The unit is not very large or heavy, and easily fits in a normal storage compartment of the RV when we arrive at our destination. I look forward to many more trips with my family in our RV and the Select 3 giving us the supplement braking we need in our jeep on any road type.


Considering the fact that the most-towed vehicle is the Jeep Wrangler, this product barely fits and the leg adjusters are nearly useless on our 2016 Jeep Wrangler. I had to remove the pedal extender that my wife uses because she is not even 5’ tall but did not have to that when we used our old classic Brake Buddy. Other than that, the unit works as advertised and no other major complaints so far after 2 days and over 1,000 miles.

I had to take the unit back to the factory. Shortly after the review, the unit failed. Pressing the “start” button the caused the device to vent out the air pressure. Problem was that the air hose that connected to the actuator became disconnected and kept the unit from operating. Since I was on the roadI could not ship the unit and wait 3-4 weeks for return. Solution was to include Brake Buddy home office in my tour schedule. A few hundred miles out of my way but there was no other workable solution for me. Overall I am happy with the performance of the unit since the repair more than 6 months ago and about 5,000 miles.
Joseph - 01/18/2022

Buick Enclave

My Blue Ox Tow bar and Break Buddy System perform as advertised. I tow my Buick Enclave behind my 30’ class C with confidence.

2014 Jeep Cherokee

I bought all of my products for flat towing my 2014 Jeep Cherokee for etrailer and I couldn’t be happier. The service was exceptional, the pricing was right, and when I did have a problem, they were right there to take care of it. When I need more goodies for the RV, I will be back!!!!


The cord end that goes in the dash mount does not make good connection. The Brake Buddy loses power on occasion. I replaced an old Brake Buddy Vantage Select. This unit is very smooth. I would give it 5 stars if it wasn't for the loose connection of the cord where it goes into the dash mounted receptacle

Unfortunately, this is a known issue for this model. If you wiggle the cord and you lose power on the Brake Buddy then this can be a replacement under the manufacturers warranty. Customer Service will reach out to you.
-- Etrailer Expert Sierra K - 10/25/2021


I only gave the unit 4 stars because the first one would not work. etrailer quickly replaced the faulty unit and I was on my way. Easy install it you keep all of the wiring straight. I would suggest laying the different harnesses out on the floor of bench before starting as different ends on different harnesses to go the same places. Having the big picture in mind will save time.

2019 GMC Acadia

So far so good! Haven't towed yet, but installation and test was successful. Install directions leave a little to be desired, all of the wires on the wiring diagram are black some have a color listed next to them some don't, it would have been a guessing game if it wasn't for the videos I found on etrailer. Upon initial test of the system, it went through its 5 actuations, indicated "normal" but kept the brake depressed, I double checked all the wiring, redid some iffy connectors, next test was the same, 5 actuations then an "error" light. Unplugged the system and waited 5 min, then performed test again. It tested well, showed "normal" but kept the brake depressed. I began to suspect the brake away switch. I repeated the pin with no luck, removed the whole assembly and the brake released. I found there was a factory splice point about 6 inches from the switch, I redid thoes connections and the system works as advertised!!
Thank you etrailer for the recommendation. Will update once I hit the road


The only reason I am giving this a 4 rather than a 5 rating is that the connector on the dash side is kinda picky and you have to jiggle it around to get a good connection. That being said, I highly recommend both this product and etrailer.


BrakeBuddy is a great product. I had verified this newer style included a 12 volt plug. It does, but there is no where to plug it in according to their manufacturer, Hopkins. I will need to rewire two tow vehicles before I can verify that this item works. The box was delivered and dropped off on my driveway without a signature for a $1300 item!!! Also, the box was not even taped shut. I have verified that all the parts are present.

Instead of connecting to a 12V accessory outlet, the Brake Buddy 3 draws power directly from your towed cars battery. To do this, the included wiring harness connects to your cars battery. Install the harness by routing the wire end through your cars firewall and into your engine compartment. Connect the harness to your battery with the included battery wire and ring terminal. Mount the connector thats on the opposite end of the harness in a convenient, out-of-the-way location beneath your cars dash.
-- Etrailer Expert Thomas M - 01/24/2022


Very unhappy with this product. Proportional braking doesn’t work, locks up the brakes on slow steep hills. Never see it breaking on the remote monitor under hard and sever braking. At this point I’m only hopeful the breakaway will work if it’s needed. Would not recommend. Install wasn’t hard and set up is ok but sometime it fails during brake bleeding. Last trip I gave up as it would not complete the brake bleed process. Very unhappy.


The Brakebuddy is an expensive part but I am concerned about the quality. The power cord socket is faulty and caused the unit to stop working traveling through Texas. The remote has the same problem, the power cord cuts out and has to be disconnected and reinserted to get it to work. I contacted Brakebuddy and they are supposed to send a new power cable but have not received it yet.

I also reached out to Hopkins, the manufacturer of BrakeBuddy, to ensure they follow up with you.
-- Etrailer Expert Thomas M - 02/03/2022


I’ve towed close to eight thousand miles in the past year. I had an incident when someone thought it amusing to pull my hitch pin while I pumped gas. The hitch dropped off about a half mile later and my break buddy saved me from any serious damage. Just got home today from a 3600 mile trip and no problem.


Poor fit for 2020 Jeep Wrangler 2 door. I had to buy the optional brake pedal adapter to get it to work at all in the Jeep. The remote is great to confirm the Brake Buddy is working. Good overall design, just not for 2 door Jeep.


Unit arrived ahead of time. Installation was quick and easy, and no parts were missing. Best of all, IT WORKS!!! Order all my parts from etrailer now. Would recommend for anyone towing


Seems good so far. I have to tweak the power cord ocationaly to make a good connection. By tweet I mean I have to spread the connectors so that they make a snug connection.


Simple setup and operation. Moderate expertise is required for initial install of wiring.

Remote is old tech and passes little useful information; needs updated to provide feedback on connection, status, error, and operation.

The brake pedal connection linkage can be frustrating to connect because it doesn’t hold the adjustment position; a locking mechanism to hold the adjustment position would be useful.


It works very well. The only thing I don't like is having to take it out and put it back in. Sort of wish I bought a permanently mounted system. But it does work well.

If you would to try something different next time you could go with item # RED44FR
Redarc Tow-Pro Elite Trailer Brake Controller - 2 Braking Modes - 1 to 3 Axles - Proportional
with part # 331-TPH-007
Redarc Plug-and-Play Wiring Harness for Tow-Pro Trailer Brake Controllers
. If your 2018 Ford F150 does not have a factory 7 way you will need to purchase a hard wire kit item # ETBC7
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
. If you do have a 7 way some models do not have power run to the brake controller port under the dash. If this is the case, you can add wiring kit item # BRK-ELECKIT
Power Wire Kit for Electric Trailer Brake Controllers - 12 Gauge
which you can use to run power to the brake controller port.
-- Etrailer Expert Sierra K - 01/04/2022


This unit says it would fit our Jeep Libery but it is a pain to get it just right to work properly. I wish the legs were a bit longer so it sat right on the floor instead of having to compensate for the front legs being to short and rear legs not adjustable to be shorter. System works fine when I get it set right.

I reached out to Hopkins and they said that it was okay for the Brake Buddy to sit against the base of the seat if it is not tall enough to reach the seat. The unit will still work properly in this position.
-- Etrailer Expert Thomas M - 11/30/2021


This system works as described. It has held up well and is easy to install for trips. High marks on this model of bike buddie.


initial unit worked great for a month or two and then died, customer service got a new one out fast and paid to ship broken one back, since then not a problem and it's been almost a year of full time RVing and towing the toad. install and removable is simple and quick once you get used to it. (used with a Wrangler 2 door behind a class C coach)


Hi Miranda, here are the pictures of the bracket and Brake Buddy installed in my Jeep. Works very well. I tried to move the seat forward a bit but when the Brake Buddy activated it pushed the seat adjuster and moved the seat all the way back. Thank you for the bracket.


We received the Brake Buddy within a week, all instructions are here. Can’t wait to hook it up.


Have been using my brake buddy for over a year. Simple connections. Works well. The remote works great. Mounted with a magnet on my dash so I can pick it up and move around if needed. I’m very satisfied.


ordered my brake buddy select 3 , came in the mail with all needed parts with no damage. Noah is the representative I talked with for ordering he was very helpful and knew everything I needed for my F-150. I have not had a chance to install yet will get back to let Y'all know how it went.

2012 Jeep Liberty

The product arrived in good condition with all the components. The installation guide and order of installation was accurate and easy to understand. The install video on etrailer site was also very helpful. The installation went smoothly and test drive proved that the unit worked as advertised.

Show More Reviews

Ask the Experts about this Brake Buddy Tow Bar Braking Systems

  • Is The Brake Buddy 2 Compatible With 1993 Geo Tracker
    Yes, the Brake Buddy 2 and the Brake Buddy Select 3 Portable Supplemental Braking System part # HM39524 is compatible with the 1993 Geo Tracker. You also need a base plate, tow bar, tow bar wiring and possibly a high low adapter. If you do not have these parts and need further recommendations please let me know.
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  • What is the Difference Between the Brake Buddy 2 and Brake Buddy 3
    As with most situations where products are updated, the differences between the Brake Buddy 2 and the Brake Buddy 3 # HM39524 may not be so obvious, or seem minute-but they do offer improvements in the functioning of the system. The Brake Buddy 3 now uses TruFit risers that quickly and easily positions your braking system for ultimate braking performance; these risers are designed to help on vehicles that have differences in elevation on the floor boards, so you'll get a much more stable...
    view full answer...
  • Should RV Flat Towing Breakaway Switch Mount to Base Plate
    We can't recommend you drill into the base plate to mount the breakaway switch as that would void the warranty of the base plate kit. Instead I would recommend mounting the switch to the bumper of the vehicle.
    view full answer...
  • Fuse Type and Rating for Brake Buddy 3 Supplemental Braking System
    The Brake Buddy Select 3 part # HM39524 that you referenced uses a 15 amp glass fuse like what you see in the picture I attached. It's the older style automotive glass type fuses. They are very easy to find at local auto parts stores.
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    Image 1 for
  • Can the Brakes of a Flat Towed Vehicle be Applied Manually using the Brake Buddy 3
    The Brake Buddy Select 3 Portable Supplemental Braking System part # HM39524 will not allow you to apply the brakes on the towed vehicle separately. Instead like you mentioned it uses a proportional sensor to apply the brakes when the towing vehicle slows. You are able to control the braking sensitivity or how how much work you want the towed vehicle to do but it doesn't offer a manual override like on a trailer brake controller to manually engage the brakes on the towed vehicle. Check...
    view full answer...
  • Does Charger Included with Brake Buddy Portable Supplemental Braking System Need to Be Installed
    Because the Brake Buddy uses power from the vehicle's battery to actuate, you will need to set up the charge circuit as directed in the installation instructions. The parts needed to accomplish this are included with the Brake Buddy.
    view full answer...
  • Does Wireless Remote of Brake Buddy 3 # HM39524 Have to Mount Flat
    The wireless remote of the Brake Buddy 3 # HM39524 does not have a specific orientation that it has to mount in so you could use it vertically or horizontally as needed.
    view full answer...
  • Troubleshooting Brake buddy on Jeep Wrangler Unlimited
    If you are of the impression that a faulty signal is being sent from your Brake Buddy, # HM39524, I suggest you remove all power for no less than 15 minutes allowing the unit to reset. We want to ensure you do not have any vacuum pressure built. If on resuming testing you have a repeated error in operation check the signal from your breakaway switch, ensure switch is fully seated. From the Tech Rep at the manufacturer, they also suggest that you double check wiring at switch housing...
    view full answer...
  • Can HM39524 Brake Buddy Flat Towing Braking System Effectively Apply Brakes with Vehicle Off
    When braking systems like the # HM39524 Brake Buddy Select 3 are designed, the engineers know that with the vehicle not running, there won't be any brake assist. Portable braking systems such as the Brake Buddy Select 3 will have no problem whatsoever exerting enough pressure on the brake pedal for safe and effective braking. The brakes still work, more force just needs to be applied to the pedal which systems like this have no problem doing. Bottom line, you don't need to run the engine,...
    view full answer...
  • Installation of Brake Buddy Supplemental Braking System on 2014 Honda CR-V
    For installation of your Brake Buddy, # HM39524, you can route the wires through a grommet that is already being used for the factory wiring. I suggest you look underneath the brake fluid reservoir to the driver's side to locate a good option; push your wiring through here then use a pull from inside the cab of the vehicle. I have attached a couple of installation videos that will hopefully assist you.
    view full answer...
  • Brake Buddy Select 3 Portable Supplemental Breaking Systems Signal Strength
    I spoke with the manufacturer, Hopkins Manufacturing, and their tech stated that he's had other customers use the Brake Buddy Select 3 Portable Supplemental Braking System - Proportional Item # HM39524 on rigs with a 55' distance with no signal issues so you should have no problems with your 47' distance.
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  • Is Brake Buddy Compatible with Air Brake Systems on Tow Vehicle
    Yes the Brake Buddy Select 3 Portable Supplemental Braking System # HM39524 that you referenced is compatible with motorhomes that have air brakes. It uses an inertia sensor to decide how hard to apply the towed vehicle brakes and can tell when you are braking.
    view full answer...
  • Does Rubber Mat Need to be Removed to Install Brake Buddy Select 3
    Yes, you will want to remove any rubber floor mat when you're installing the Brake Buddy Select 3 # HM39524. It doesn't say this in the instructions but it's still recommended. I confirmed this with my contact at Hopkins/Brake Buddy.
    view full answer...
  • Brake Buddy Select 3 Portable Supplemental Braking System Dimensions
    That's a hard number to give since a portion of the # HM39524 fits under the dash but I can give you the overall dimensions of this and you can compare that to the available space you have to see if it would fit. This measures 19" long x 11-3/4" wide x 6-3/4" tall.
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  • Will a Portable Braking System Drain the Battery on my 2020 Jeep Gladiator?
    Yes, a portable braking system like the Brake Buddy Select 3 Portable Supplemental Braking System - Proportional item # HM39524 will drain the battery on your Jeep Gladiator. That is why the portable braking system comes with a wiring harness that connects directly to your Jeep's battery to draw power and the RV recharges your battery while in use. Not every portable braking system includes this feature but the Brake Buddy Select 3 item # HM39524 does. You will want to ensure the 7-Way...
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  • Installation Instructions for Brake Buddy Select 3 Braking System
    I am sorry to hear that you did not receive the instructions for your Brake Buddy Select 3 Portable Supplemental Braking System # HM39524. But yes, there is an online version of the instructions and I have linked them here for you. The Brake Buddy Select 3 draws power directly from your towed car's battery. To do this, the included wiring harness connects to your car's battery. Install the harness by routing the wire end through your car's firewall and into your engine compartment. Connect...
    view full answer...
    Image 1 for Image 2 for
  • Comparing the Brake Buddy Classic 3 and Brake Buddy Select 3 Supplemental Brake Systems
    Great question! The Brake Buddy Classic 3 # HM39494 is a more basic system than the Brake Buddy Select 3 # HM39524 as the Classic just uses preset braking (which applies the brakes at a preset intensity when the inertia sensor detects deceleration) while Select lets you choose between proportional and full-braking action (activates towed vehicle brakes at max power regardless of RV brake pedal intensity) when you’re towing a vehicle. The Select also comes with a remote control so you can...
    view full answer...
  • Does Wireless Remote for Brake Buddy Select 3 Need Signal Booster
    The wireless remote that comes with the Brake Buddy Select 3 # HM39524 is designed to sit in the cab of your RV and still be able to communicate with the portable system that is mounted in your towed vehicle. You won't need a signal booster to use this system.
    view full answer...
  • Will Brake Buddy Select Braking System Fit 2006 Jeep Wrangler Rubicon
    There's no reason the Brake Buddy Select part # HM39524 wouldn't work in your 2006 Jeep Wrangler. It just hasn't been added to our fitguide at this time. This is a proportional braking system that senses how hard you apply the vehicle brakes and applies them in a proportional amount on the tow vehicle. The advantage the Select model has over the Classic is that it can also give you a "full brake" setup which applies full braking power all the time when brakes are applied. This is particularly...
    view full answer...
  • Replacement Controller for Brake Buddy Select 3
    I spoke to the technicians over at Hopkins and the Brake Buddy Select 3 # HM39524 will still work without the controller. The accelerometer that actuates the braking system is located in the actual braking box itself. That being said, you will not be able to adjust the intensity of the brakes or have the manual override function. I suggest replacing the controller # HM39505 at you earliest convenience.
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  • Brake Buddy Braking System That Fits A 2021 Jeep Wrangler
    The only Brake Buddy system we have that fits your 2021 Jeep Wrangler is the Brake Buddy Stealth Supplemental Braking System # HM39530.
    view full answer...
  • How Does Brake Buddy Select System Charge
    The Brake Buddy Select systems like the 3 part # HM39524 draws power directly from your towed car's battery. To do this, the included wiring harness connects to your car's battery for the charge. Install the harness by routing the wire end through your car's firewall and into your engine compartment. Connect the harness to your battery with the included battery wire and ring terminal. This is a very common way for similar systems to be powered.
    view full answer...
  • Brake Buddy Not Fitting In 1994 Jeep Wrangler
    First thing you want to do to set up your Brake Buddy Select 3 Portable Supplemental Braking System - Proportional Item # HM39524 in your 1994 Jeep Wrangler is make sure your seat is slid all the way back. Second make sure the brake pedal clamp is not on the unit when you set it on the floor board. Place the unit on the floor, in front of the seat, with the arm centered on the brake pedal. Adjust feet for necessary height. Add the clamp on the brake pedal and attach to unit arm with pin...
    view full answer...
  • Will Hopkins HM39524 Brake Buddy Select 3 Actuate Brakes Even Though Vehicle Isn't Running
    Although you won't have power brake assist with the vehicle off, the Brake Buddy Select 3, part # HM39524 will apply enough pressure to the brake pedal that the brakes will work just fine once the unit is installed and properly set up according to the installation instructions. You'll be able to remotely control the unit from the cab of the motorhome. I've linked to an install/demonstration video that you might find helpful.
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
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Video Edited:
Jeff D
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