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BrakeBuddy Towed Vehicle Battery Charge Kit

BrakeBuddy Towed Vehicle Battery Charge Kit

Item # BB54FR
Our Price: $51.66
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Accessories and Parts BB54FR - Battery Charge Line Kit - Brake Buddy
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Maintains the battery charge on your towed vehicle while it is being flat towed. Uses up to 15 amps from your RV's battery. 1-800-940-8924 to order Brake Buddy accessories and parts part number BB54FR or order online at Free expert support on all Brake Buddy products. Great prices and Fastest Shipping for BrakeBuddy Towed Vehicle Battery Charge Kit. Accessories and Parts reviews from real customers.
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  • Reviews (84)
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  • Videos (8)
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Brake Buddy Accessories and Parts - BB54FR

  • Tow Bar Braking Systems
  • Battery Charge Line Kit
  • Brake Buddy

Maintains the battery charge on your towed vehicle while it is being flat towed. Uses up to 15 amps from your RV's battery.


  • Maintains the battery charge in your towed vehicle while it is being flat towed
  • Uses up to 15 amps from your RV's battery

39339 Hopkins Brake Buddy Dinghy Vehicle Battery Charger

Video of BrakeBuddy Towed Vehicle Battery Charge Kit

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of Brake Buddy Towed Vehicle Battery Charge Kit - BB54FR

Hi, everybody, Andy here with, and today we're gonna take a brief look at this Brake Buddy towed vehicle battery charge kit. This is going to maintain the battery charge on your towed vehicle while you are flat towing it. It uses up to 15 amps from your RV's battery to keep your towed vehicle's battery charged. So you're never going to have to worry about a dead battery on your vehicle after unhooking it from being towed behind your RV. Our customers seem to be overall very happy with this kit, and they say it's very easy to install. And it's just gonna give you the peace of mind knowing that your car is gonna be ready to go when you arrive at the campsite or at the RV park, and your vehicle will be ready to go after you unhook it from your RV.

Well, that's gonna conclude our brief look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me..

Customer Satisfaction Score:

Customer Reviews

BrakeBuddy Towed Vehicle Battery Charge Kit - BB54FR

Average Customer Rating:  4.6 out of 5 stars   (84 Customer Reviews)

Maintains the battery charge on your towed vehicle while it is being flat towed. Uses up to 15 amps from your RV's battery.


did not know how to attach these pictures to the site you provided in your email so I am sending to you like this. First, my overall rating is five stars. Second, the installation was not hard at all and took me less than an hour. Third, the lack of instructions leave a lot to an individual's imagination but with so many different vehicles I understand why. However, a link to the general instructions in your video file would help a lot.

These pictures show my installation of the battery maintainer on my 2014 Fiat 500 L.
Picture 1 is of the mounted fuse unit on the driver's side fender firewall.
Picture 2 shows the ground wire (White wire attached to the front quarter panel attachment bolt.
Picture 3 shows the Black wire attached to the Positive terminal on the battery.
Picture 4 shows the charge unit and fuse mounted on the driver's side fender firewall together.
Picture 5 shows the vehicle taillight wiring lines being followed down to the six way plug on the front of the towed vehicle.


etrailer was a great resource when setting up my 2021 Wrangler Islander for flat towing! The BrakeBuddy works great... we haven't had any problem with the battery at all. Would highly recommend it!


Kit does not have a diode to prevent back feeding Motor Home battery when stopped for the night or for meals while on the road. Requires unplugging to prevent drawing down Motor Home Battery while Motor Home engine is not running.

It is recommended to unplug the unit when your destination is reached to prevent unnecessary draw on the battery.
-- Etrailer Expert Katrina B - 12/08/2022


Had it installed yesterday. Very well done but came with the flat connector instead of the round 6 pin connector so had to modify to include the battery charger. This company is not part of Blue Ox tow bar manufacturer which is confusing. It all checks out so think it will work good but above issues is why the 3 stars.

We are not connected to Blue Ox besides distributing their products.
-- Etrailer Expert Katrina B - 08/15/2022


Very easy and straightforward on the installation. I installed this myself, no issues or problems. Checked the system before flat towing…worked without issue.

2018 Open Road 36UA, flat towing 2020 Jeep Cherokee TrailHawk, using Brake Buddy 3


easy to install, I do hope it works once I get rolling!I chose this one over Roadmaster's because of the ease of install.


Working fine keeping the jeep battery charged while towing


Everything worked as expected. Install videos were spot in


Easy install.Followed the videos and bam!tow my f150 about 7000 miles no problem


Thank you for the quick turnaround and great communication!


Haven’t installed yet, however a few pages of printed instructions would have been nice. 2ndly your tracking was not terrible good, but your follow up call was refreshing.

I recommend watching the video installation that we have on 2021 Ford Ranger. It may not be your exact vehicle however it does give an idea of what you would be looking for.
-- Etrailer Expert Jenny N - 06/11/2022


Arrived Quickly and was very easy to install along with the baseplate and taillight wiring


Great produce and super easy to install. would give it 5 stars if it was set up for 3 wire instead of two. I love the plug and play but since Hopkins went that far, doesn't seem like much more effort to make it 3 wire, or at lease make the additional diode kit also plug and play. Still very happy with this and etrailer is wonderful to work with. it arrived sooner than was expected.

After using the wiring kit for a oit a year and thousands of miles I am still very happy. I have had no issues and it works flawlessly.
Home - 08/06/2021


I received everything on time, and with the sales person help I also ordered the correct parts .


Be sure to follow instructions. The wire colors do not follow normal thought. Works awesome for many months and about 3000 miles.


As with all orders from you, it was as expected. Thank you for rapid shipment and correct items.


Works great to keep our toad battery ch arged.


Product was reasonably priced and came as advertised


So, I purchase this kit from you and you and when asking for instructions on you say there are NO Instructions from the manufacturer". So how do you all propose I proceed? So NO wiring diagram, NOTHING???
Sure NOT the kind of service I come to expect from etrailer.

Thank you for your review. Since this part is designed to be used with the Brake Buddy supplemental braking system you can use the instructions from that part to install the charger. I have attached a helpful link for your reference.
-- Etrailer Expert Heather A - 07/02/2021


Excellent easy to install


Very stratified with the etrailer service very helpful, videos are great, fast service dedicated customer...


I called etrailer before to conclude my order on internet. Got every infos I needed. I received everything I ordered in Canada 1 day faster then expected. Very satisfied.


Camella very helpful and friendly and her help was greatly appreciated in completing my order.


Tammie P was very helpful and knew the products. Everything I needed was available and shipped very quickly. Order arrived in 3 days.


Put this in my towed Chevy HHR to allow me to keep the power on so my brake lights would illuminate when the Brake-Buddy applied the brakes. Works great and install was very easy.

Show More Reviews

See what our Experts say about this Brake Buddy Accessories and Parts

  • Will the BrakeBuddy Charge Kit Back Feed to my Motorhome
    That depends on your towing vehicle. If there is constant power to the 7-way of the towing vehicle the BrakeBuddy Towed Vehicle Battery Charge Kit part # BB54FR will try to normalize or balance the vehicles when not being towed. If it does not have constant power it will not. Either way Brake Buddy recommends unplugging it when the towing vehicle is going to be parked for an extended period of time.
    view full answer...
  • Does BrakeBuddy Towed Vehicle Battery Charge Kit Wire to 12 Volt Accessory Circuit of Tow Vehicle
    The # BB54FR that you referenced would work great in the setup you mentioned. It will connect to the 12 volt accessory circuit of your 7-way and will keep your battery topped off. The 14.6 volts you mentioned would not be an issue either.
    view full answer...
  • Does Hopkins Brake Buddy BB54FR Toad Charger Need Ground Ran to Towed Vehicle Battery
    The BrakeBuddy Towed Vehicle Battery Charge Kit # BB54FR that you referenced does not need a ground wire ran to the tow vehicle's battery. The charger needs power and ground but similar to an alternator in a vehicle just the power wire from the charger would need to run to it.
    view full answer...
  • Why Would Vehicle Battery Still Drain After Install of BrakeBuddy Tow Vehicle Charge Kit
    The Hopkins BrakeBuddy charger part # BB54FR that you referenced can provide up to a 15 amp hour charge. Now if there's a circuit on your Equinox that is active when you are towing that draws more than 15 amps you are going to see the battery eventually drain like you mentioned. Is the radio on in the Equinox or any extra circuits that don't need to be on like lighting?
    view full answer...
  • Flat Towing A 4WD Chevy Colorado With Automatic Transmission
    Chevy Colorado 4WD with automatic transmissions from 2015 to 2021 are confirmed per the owner's manuals to be able to be flat towed. 2WD Colorado's are not flat tow capable due to the risk of damaging the drivetrain. You'll want to follow all directions in your owner's manual for flat towing. One of those directions is to disconnect the battery so you'll need to use a braking system that will wire directly to your battery and you'll want to use a battery charger like the BrakeBuddy Towed...
    view full answer...
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  • Drained Battery While Flat Towing A 2017 Terrain 4 Cylinder Troubleshooting
    If your battery is draining in two hours you have a seriously major drain on your battery or your battery is bad. You shouldn't have to pull all these extra fuses to preserve battery life while flat towing. It also sounds like your charge line might be hooked up incorrectly or is just bad. I recommend replacing it with the BrakeBuddy Towed Vehicle Battery Charge Kit Item # BB54FR. You should not remove fuse # 16 as your brakes could lock up while towing and cause an accident. The owner's...
    view full answer...
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  • Fixing The Death Wobble While Flat Towing A 2018 Jeep Cherokee Trailhawk
    Newer model Jeeps have electric power steering systems that require activation while flat towing to prevent the death wobble. You'll have to purchase the Mopar Recreational Flat Tow Wiring Kit part 68321424AB through a dealer to activate the power steering and resolve the death wobble. Activating the electric power steering will put a drain on your vehicle's battery so you'll also want the BrakeBuddy Towed Vehicle Battery Charge Kit Item # BB54FR maintain the charge level of your battery.
    view full answer...
  • Is Brake Buddy Charge Line Kit BB54FR Compatible With Brake Buddy Classic II?
    The BrakeBuddy Towed Vehicle Battery Charge Kit # BB54FR you were looking at is indeed compatible with your brake Buddy Classic II. This kit works with any braking system and will even work if no braking system is used. I included a video of the # BB54FR being installed for you to take a look at.
    view full answer...
  • What Battery Charge Line Kit do You Recommend for My 2022 Jeep Cherokee?
    For a great charge-wire kit for your flat-towed 2022 Jeep Cherokee, I recommend the BrakeBuddy Towed Vehicle Battery Charge Kit # BB54FR. This kit will provide your battery with a continuous battery charge (up to 15 amps) on your Jeep Cherokee. I went ahead and linked an installation video that shows the installation on a 2019 model. The installation on your 2022 model will be nearly identical.
    view full answer...
  • Amperage Rating For The BrakeBuddy Towed Vehicle Battery Charge Kit # BB54FR
    The BrakeBuddy Towed Vehicle Battery Charge Kit # BB54FR is going to send up to 15amps from the motorhome to the towed vehicle.
    view full answer...
  • Keeping Your Battery Charged While Using The Demco Stay-In-Play DUO Supplemental Braking System
    The Demco SBS Stay-IN-Play DUO Supplemental Braking System - Proportional # SM99251 is going to be connected to your vehicle's battery to be powered which will drain your vehicle's battery. To keep the battery charged while towing you can install the BrakeBuddy Towed Vehicle Battery Charge Kit Item # BB54FR. You'll still be able to disconnect the negative battery cable like the manual indicates for flat towing.
    view full answer...
  • Switch that Could be Used with BrakeBuddy Towed Vehicle Battery Charge Kit Item # BB54FR
    If you wanted to be able to leave the # BB54FR attached to your tow vehicle without it possibly draining your tow vehicle's battery would be to add a switch like the part # D16740 on the red wire that runs to the charger so that you could cut off the connection when you didn't want it to. Aside from that you'd have to disconnect it every time.
    view full answer...
  • How To Wire Brake Buddy Battery Charger 39339
    The BrakeBuddy Towed Vehicle Battery Charge Kit part # BB54FR comes with a the Brake Buddy Select 3 Portable Supplemental Braking System part # HM39524. I have attached a wiring diagram of how this is setup with the Brake Buddy.
    view full answer...
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  • Braking system solution for 1999 Jeep Wrangler Flat Towed by 2013 Ford F150
    I would suggest using the Brake Buddy Select 3 Portable Supplemental Braking System # HM39524. It is a great option that requires minimal installation for power and emergency brake away cables. It is also portable so it can be moved to different vehicles very easily. It includes a remote that you can use in your Ford F150 or any other vehicle with a 12 power supply. The remote allows you to receive feedback from the unit as well as be able to adjust the sensitivity while you drive. This...
    view full answer...
  • Brake Buddy 3 Vehicle Battery Charging Capabilities
    The Brake Buddy Classic 3 Portable Supplemental Braking System Item # HM39494 has a charge kit # BB54FR included that will keep your battery charging while you tow. The Brake Buddy 3 will alert you if your battery ever falls to 10v.
    view full answer...
  • Powering A Braking System For Flat Towing A 2020 GMC Canyon
    When flat towing your vehicle most owners manuals state the need to remove the negative cable from the vehicle's battery which would make your 12v plug-in non-operational. Instead I recommend the Brake Buddy Select 3 Portable Supplemental Braking System - Proportional Item # HM39524 as it wires directly to your battery will come with the BrakeBuddy Towed Vehicle Battery Charge Kit Item # BB54FR to prevent your vehicle's battery from dying while towing.
    view full answer...
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  • Brake Buddy Classic 3 Power Source
    You would not want to power your braking system that way because if there was a disconnect between the RV and vehicle your Brake Buddy system # HM39494 would have no power running to it. The # HM39494 comes with the BrakeBuddy Towed Vehicle Battery Charge Kit Item # BB54FR to ensure you're battery stays charged while towing. Hybrid brakes don't require as much of a push because they are assisted. You'll want to match the style of brakes of the towed vehicle when choosing between the hybrid...
    view full answer...
  • Why Should You Disconnect The Battery When Flat Towing
    The general reason a battery needs to be disconnected for flat towing is because there are certain functions that need to be disabled to prevent your vehicle's battery from draining. You wouldn't want to get to your destination and unhook and then have a dead battery and not be able to move your vehicle. You should always follow your vehicle's manual to the letter to prevent damage to your vehicle. If you want to install a switch to make disconnecting and reconnecting the battery simple...
    view full answer...
  • Can BrakeBuddy Charge Line Kit Install with Tow Vehicle that has Roadmaster Invisibrake
    You can add a BrakeBuddy charge line kit part # BB54FR to your flat tow setup that is using an Invisibrake part # RM-8700 and it wouldn't interfere. It would put an additional charge on the battery like you are wanting.
    view full answer...
  • Installing and Powering the Brake Buddy Classic 3 Portable Supplemental Braking System
    The Brake Buddy Classic 3 Portable Supplemental Braking System, # HM39494 comes with the BrakeBuddy Towed Vehicle Battery Charge Kit, # BB54FR. This should be used when installing the Supplemental Braking System, # HM39494. There's good chance the fuse for your power port socket is blown. Please note the linked installation video below.
    view full answer...
  • Troubleshooting Issues With 2017 Jeep Cherokee Causing Braking Issues When Being Flat Towed
    Your 2017 Jeep Cherokee Trailhawk was notorious for having a death wobble while towing. The Jeep steering system harness adds power to the electric steering motor to eliminate the wobble. I recommend checking the add on harness as there is a fuse which can go out which would allow it to occur again. You can use a Test Light # PTW2993 to check power on both sides of the fuse as well as going through the switch installed by Jeep. Finally be sure to check the Charge Line # BB54FR which came...
    view full answer...
  • Is Towed Vehicle Battery Charge Kit Needed With Roadmaster Invisibrake
    Appreciate the purchase of the Roadmaster InvisiBrake Supplemental Braking System # RM-8700. And as far as the trickle charge, the InvisiBrake does provide up to a 2 amp charge on your battery if the running lights are on, so if the running lights are always on, you don't need the BrakeBuddy Towed Vehicle Battery Charge Kit # BB54FR. If your running lights (often activated by headlights) are going to be off at any point though, the charge line kit is something you'll want to use.
    view full answer...
  • How To Install The Brake Buddy Charge Line Wire When Using Magnetic Lights
    To install the charge line kit # BB54FR included with your Brake Buddy Classic 3 Portable Supplemental Braking System # HM39494 while also using magnetic lights you would need to just run the wire to the front of your Wrangler and crimp on a bullet connector. You could then run the line from the motorhome side over to the vehicle and crimp a bullet connector onto it to connect the two wires together and charge the battery. I would pick up some Velcro straps from your local hardware store...
    view full answer...
  • Wire to Run from Trailer 7-Way to Charge Trailer Battery
    There is a much less expensive, easier, and more effective way to charge your trailer battery from your 7-way by just running 10 gauge wire from the 1:00 pin of the 7-way to the trailer battery. We offer 10 gauge wire as part number # 10-1-1 which is sold by the foot.
    view full answer...

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