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Roadmaster InvisiBrake Supplemental Braking System

Roadmaster InvisiBrake Supplemental Braking System

Item # RM-8700
Our Price: $1,006.69
You Save: $308.31
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:

  • Don’t have time to waste setting up a portable system before every trip
  • Want to know when your towed vehicle’s brakes are being applied
  • Want complete control over when your towed vehicle’s brakes activate

No, if you:

  • Are typically a DIYer, but don't want to have to deal with a more complicated install
Get automatic, real-time braking in your towed vehicle with the InvisiBrake. Actuator box installs permanently so that you never have to remove, adjust or reactivate. System connects to RV and engages car brakes when the RV brake lights illuminate. Great Prices for the best tow bar braking systems from Roadmaster. Roadmaster InvisiBrake Supplemental Braking System part number RM-8700 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (174)
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Roadmaster Tow Bar Braking Systems - RM-8700

  • Brake Systems
  • Hydraulic Brakes
  • Air Brakes
  • Pre-Set System
  • Fixed System
  • Roadmaster
  • One Time Set-Up
  • Power Assist Brake Compatible

Get automatic, real-time braking in your towed vehicle with the InvisiBrake. Actuator box installs permanently so that you never have to remove, adjust or reactivate. System connects to RV and engages car brakes when the RV brake lights illuminate.


  • Braking system activates brakes on towed vehicle when you engage the brakes in your RV
    • Cable pulley tugs towed car's brake pedal gently, gradually and with balanced pressure when brakes are applied in RV
  • Permanent installation - nothing to remove or disconnect
    • Actuator box mounts out of the way - typically beneath the driver's seat
  • One-time setup - no need to readjust or continuously activate
    • System automatically functions when connected to RV
    • Braking pressure does not have to be readjusted after initial setup
  • Compatible with hybrids and other continuous-power-assist automobiles
    • Braking pressure can be adjusted from 5 psi to 80 psi so that an appropriate amount is applied
  • No false braking - activates only when RV brake lights are illuminated
  • Integrated battery protection
    • Bypasses 12V outlet - connects directly to towed car's battery and constantly charges battery when you are towing
    • Provides a trickle charge to the vehicle battery if the running lights are on on the tow vehicle
  • 2-Stage motor home monitor has audible and visual warnings
    • LED monitor illuminates when towed car's brakes are activated
    • Audible alert lets you know if brakes have been activated for too long (approximately 20 seconds)
      • System automatically begins to release pressure after 15 seconds of continuous braking
  • Emergency breakaway device included
  • Made in the USA


  • Controller box dimensions: 8-3/4" long x 8-3/4" wide x 2-3/4" tall
  • Power draw: 6 mA - 10.8 amps
  • Maximum braking pressure: 80 psi
  • Limited lifetime warranty

Note: This product does not work on vehicles with a non-electric hydroboost braking system.

When using TrailerMate wiring with the InvisiBrake, it will be necessary to purchase an additonal two diodes, (RM-792 - sold separately), to prevent the towed vehicle's brake signal from back-feeding into the InvisiBrake system and activating it when attempting to drive the vehicle.

Fully Automatic Braking Action

Wire the InvisiBrake into your vehicle, connecting it to the battery and electrical harness, and you never have to remove it. When you're ready to tow your car, just connect the it to your RV via the included electrical cable, and the system is ready to go.

The InvisiBrake is designed to activate the brakes in your towed car upon receiving a signal from your RV that the motor home's brakes have been applied. This signal is sent via the wiring harness whenever the RV's brake lights are illuminated. This way, you get real-time braking action, ensuring that your towed car brakes at the same time and for the same duration as the brakes in your RV. In addition, there will be no false braking when you hit bumps or potholes.

Adjustable Pressure Settings

The braking pressure of the InvisiBrake can be adjusted from 5 psi to 80 psi depending on your individual application and preferences. Typically, a braking system has to apply an extreme amount of force to activate the towed car's brakes because the vacuum-assist function of the brakes is not active when the ignition is off. This excessive pressure would cause damage to your car if it had "active" brakes. Because this system lets you adjust the braking pressure to a comparatively minimal amount, you can use it on automobiles that have continuous-power-assist brakes, such as Hummers and hybrids, without having to worry about any potential damage.

The pressure setting needs to be adjusted only once, during the initial installation, at which point you can test the system at different settings to determine which feels best. Once the setting is determined, it does not have to be readjusted, so your system is always ready to go.

Permanent, Out-of-the-Way Installation

Most often, the InvisiBrake actuator box installs beneath the front seat of your towed car, neatly tucked away so that you won't see it and it won't take up any storage space in your vehicle. You can, however, install it anywhere in your towed car that is convenient for you, as long as you can still access the adjustment knob.

A bracket and cable pulley will install on the arm of your vehicle's brake pedal. This will not interfere with normal braking function and does not have to be adjusted, removed or activated. The entire system can stay in your car year 'round, waiting for those times when you need to tow. And once you do hook up your car to your RV in preparation for towing, the system will function automatically.

8700 Road Master Invisi-Brake Tow Bar Braking System

Installation Details RM-8700 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Roadmaster InvisiBrake Supplemental Braking System - RM-8700

Average Customer Rating:  4.8 out of 5 stars   (174 Customer Reviews)

Get automatic, real-time braking in your towed vehicle with the InvisiBrake. Actuator box installs permanently so that you never have to remove, adjust or reactivate. System connects to RV and engages car brakes when the RV brake lights illuminate.


The installation went as planned. All parts fit and worked the first time.


2021 Ford Ranger. The installation is not really technically challenging, but there are a lot of steps and you need to twist yourself under the dash for quite a bit of it. The main installation comment I would have is assume you are going to drill a hole in the firewall for the wires/air hose. Using the existing grommets is more work/risk than it is worth. There were several videos, but none specifically for my vehicle and I would have liked the specific detail on the air connection. We have about 800 miles towing with it so far and it definitely it helps with stopping, plus the break-away safety is good peace of mind.

2016 Jeep Grand Cherokee

Good quality materials.
Fast delivery
Complicated install. 16 hours labor for me to install toad portion, including bulb kit. 8 hours to install indicator light/warning beeper in RV. Worth the one time effort for me to not have to set and remove floor mounted brake system each time I want to drive the toad.

2002 Jeep Grand Cherokee with electric drivers seat. Controller would not fit under drivers seat, installed in cargo area behind rear seat. Good instructions for install.

Kit included everything I needed. Due to controller placement, the controller power leads were not long enough. Air line to air cylinder connection was difficult to get right. Was not as "sure" as air line to controller. Took 3 attempts to get it to not leak.

Overall a good product, I expect it will last a long time and be very reliable.

Checked my review today as posted. I mistakenly marked 3 stars, meant to mark 4. Only negative was the hard to make connection at the air cylinder.Everything else was top notch.
-- comment by: Triplewide - 01/06/2016


Purchased this braking system and installed on 2005 Jeep Wrangler and towed for over 3000 miles with no issue. Uninstalled and reinstalled on a 2016 Jeep Wrangler this fall. By far, the best supplemental braking system we’ve ever used.

Jeep Grand Cherokee

Permanent installation looks and works great. Simply connect to the tow vehicle and ready to go…every time! The only issue I see is the Jeeps brakes seem to lose vacuum as the brake pedal is “hard” to push after sitting overnight.

2009 Subaru Forester

I would highly NOT recommend the Invisibrake system if you are installing it yourself unless you are young and have a minimum of a Masters Degree in Automotive Engineering.


Happy so far. I wouldn’t say installation is difficult but it did take me some time. Unit just barely fits under the drivers seat of my ‘03 TJ so it is out of the way. Does take away leg room from the rear passenger but who rides in the back of a TJ right? I did have to fab up some spacers for the clip that holds the brake cable due to the fact that the firewall of my TJ has a ridge right where it needed to be mounted.


The unit does make noise when you get on the brakes while driving the tow get used to it after a while.


A little more difficult than others to install but definitely worth the money. The only thing I noticed is every couple of hookup’s you need to pump the brakes once to activate the system

2013 Subaru Forester

Great product. Only used for small sub-50 mile trips so far, but working as advertised.

Take the installation slowly, watch the video for your car several times. The hardest parts for me were running the wires through my Subaru's firewall and into the engine compartment (I used the firewall on the side that comes out inside the driver's wheel well), and screwing the pulley pivot point to my car because of the tight space.

Do yourself a HUGE favor and guy purchase some good lath self-drilling screws 3/4" and 1" should be long enough. The wimpy dinky screws that came with the package weren't good enough to driving into my Subaru's flooring. Spent several frustrating hours trying to get them in, before giving up and purchasing these other screws and being done in minutes.


Intermittent brake application sticking on. 3 different times in 4000 miles but always seems to fix itself.

2015 Jeep Wrangler Unlimited

The product arrived within a reasonable amount of time. Instruction for installation was pretty good between both what came with the kit and the video etrailer web site. For the most part the installation went well but there are a few things I would like to comment on, and they are:
1) The self tapping screws to install the control unit to the floor of my towed vehicle were too short to get through the carpeting and into the sheet metal with enough bite to hold. Instead I used longer 1/4 - 20 bolts.
2) The vacuum check valve came apart while I was pushing it into the brake vacuum line. I was able to not lose the rubber membrane inside and used super glue to put it back together. I tested it and is working fine but I did order another check valve to the tune of [a few extra] more dollars.
3) It would have been nice to have the etrailer video show something on where to hook up the "Monitor System" from the towed vehicle. It took some doing but I was able to locate the brake switch and tap into the cold side for the signal.

Although I haven't put any miles on this system yet my test of it went well.

Thanks for the feedback and review Ken. I wanted to let you know that I have included a link to one of our installation videos and at about the 15 minute mark there are some details about installing the monitoring system in the RV.
-- Etrailer Expert Rachael H - 09/01/2017
A year later and Im still in love with the Roadmaster tow bar & base plate and InvisiBrake braking system. We just got back from a road trip that started around Seattle down to Bryce canyon and back. The tow bar and brake system worked flawlessly, I could not be more pleased. Also, recently I traded in the first Jeep that I installed this system on for a newer Jeep. Knowing that I would be towing the new Jeep as well, I wanted to uninstall the base plate and brake system from my old Jeep and reinstall them on the new. The process went very well, actually faster than the first time I installed it. So, bottom line is that Im very pleased with this set up and would recommend it highly.
Ken K - 09/01/2018


Install was fairly reasonable and the videos were spot on. After 1 year, it is still going strong and the system sits under the seat and out of the way. Hook the car up to the RV and it works without worry.


Works great! Just the wireless extra piece separate from this had to be reset.

2014 Honda CR-V

Installed in a 2014 CRV. Worst part was getting all the wiring and under the door sill trim panel and routed up through the firewall into the engine compartment, and getting the cable and pulley installed up to the brake pedal. Pretty crowded under the dash in a CRV (my ribs are still sore)! had to use a different clamp on the vacuum cylinder because I had to move it forward of where the video showed in order for the cable to reach the mounting location under the dash. Had to clamp it around the larger end of the cylinder and the supplied clamp would not fit around the larger diameter end. Maybe Roadmaster has shortened the cable? Haven't tested yet but have high hopes! I used the videos extensively, and couldn't have done it myself without them! Not bad for a 72 year old!

Excellent! Have used it towing my CRV on two 2,ooo mile trips since installation. Works very well
G.D. - 08/23/2016

2022 Ford Maverick

Very quick order response.

Still works great
David - 10/20/2022


Nice product and simple to install should be easy to use. I installed under the seat of my 99 jeep wrangler

2020 Jeep Gladiator

Challenging install but performs well. Installed under the front seat (not perfect), but is hidden well.


This review is more for eTrailer than the product RM-8700, which is a great product as well. I will be submitting further reviews as I install the device.
If you want to work with a knowledgeable staff, one that actually listens to your needs and not a company that simply sells a product just to get numbers. Deal with eTrailer.
If your RV has any need these guys know or will find out (as long as its in their area of expertise) and get back to you. They carry great products, they ship as promised and they stand behind what they sell. I highly recommend eTrailer.

Most excellent products and customer service. I had purchased a few different items from eTrailer and found that there were a couple of missing items. Without question or hesitation, they were in shipping and satisfying my problem. After I got into the project, I found the missing items and notified eTrailer of my error. I cannot say enough good things which describes the excellent customer service, product knowledge and assistance they offer their customers and potential customers.
Guy L - 08/10/2020


Not for pure amateur DYI’rs but anyone with good mechanical skills can install this unit. Once installed it worked great but would strongly recommend installing a battery charging unit along with it to insure your vehicle will start after a long tow.


The knowledge the staff that worked there was very helpful when purchasing the right product we needed. Thank you

2020 Jeep Gladiator

Have not Installed yet, but I order all of my supplies and parts from etrailer, good knowledgable people, prompt deliveries, and answers all questions.


Really like this system. Once installed you don’t know it’s there. Nothing to remove or store. Better thank brake buddy type. Recommend.

2014 Honda CR-V

This was part of many Roadmaster components I ordered from to set up my 2014 Honda CRV as a toad. Etrailer's website is excellent and their review videos and installation videos are very helpful. Their tech service department is excellent as well.

Regarding the Roadmaster Invisibrake, I chose this unit because I did not want anything visible nor any connections to make when setting up to tow or disconnecting. The control unit is hidden under the driver's seat and hardware under the door trim panels. I varied slightly from the etrailer's video in where I mounted the locking clamp and pulley (I did not put the clamp on the raised emergency brake bracket because it was slightly out of line to the pulley that was mounted flush on the floor). Because I choose to route the separate lighting kit wiring on the inside of the vehicle... along the same trim panels and rear trim panels, this made a very convenient place to splice into the wiring next to the Invisibrake control box...nice and protected. The alternative locations of splicing into the lighting wiring harness is under the vehicle....not an ideal place because of road salt, grime and pinch points. I also used the lighting kit with separate bulbs to not interfere with the already installed trailer harness kit for the Honda trailer hitch, nor having to deal with diodes.

The Invisibrake works well. I used the extra blue wire in the connecting tow bar wiring harness (7 pin to 6 pin), and the unused brake controller wire in the motorhome that runs to the dash of the motorhome, to operate the signal light. Works great and looks neat.

I would recommend that Roadmaster provide some sort of adjustment of the cable at the air cylinder in future generations of this product if possible. This would help on shortening the distance between the mounting clamp and pulley in cases where there is not much room (like in this Honda). Because the only way of taking up the slack now is the combination of the clamp and pulley locations, it somewhat restricts the options on mounting locations and may make some extra work. Regardless of this suggestion, I like the design and initial quality of the Invisibrake and would recommend this unit to anyone wishing to install a supplemental braking system. This does take some pretty good mechanical skills and body contortions to install but if you have that ability...I recommend this unit to the serious do it yourselfer. Otherwise, have a pro install it.

Jeep Wrangler

I do virtually all my own maintenance on all 7 of my vehicles. This installation is not conceptually difficult, but working under the dash of a Jeep Wrangler is literally painful. The hardest part is figuring out where to mount the controller and route the brake cable. My Jeep is not the same as the video and I needed to install it a little differently. Take your time here and get it right the first time.

I made several modifications to the standard installation - including hooking all the signals (including the Monitor) from my truck camper to my towed Jeep through a 7-Pin RV connector and hooking the power to the Invisibrake through a switch to the battery so I don't have to run my Parking Lights to power the controller. I had a couple questions that the folks at Roadmaster answered cheerfully and professionally.

BTW Etrailer is a pleasure to do business with.

Show More Reviews

See what our Experts say about this Roadmaster Tow Bar Braking Systems

  • Wiring Diagram And Orange Wire Connection for Roadmaster InvisiBrake Supplemental Braking System
    The orange wire, see wiring diagram attached, is not used for the Roadmaster InvisiBrake Supplemental Braking System, RM-8700. Roadmaster added that wire when developing the braking system and found that it was not needed, so it is not used for installation at all. I attached an installation video that should help you with your installation also. If you look closely just after the 8:48 minute mark you can see the orange wire and that it was not used in the installation. We just bundle...
    view full answer...
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  • Will Roadmaster InvisiBrake Braking System Fit Under Passenger Seat on a 2013 Jeep Wrangler
    The ideal location for the controller box of the InvisiBrake, # RM-8700, is under the drivers or passengers seat. However, it can be mounted anywhere in the interior of the vehicle; under the rear seats, in the trunk, or behind panels. I have included a link to the instructions to the right. Based on those you should be able to determine that best mounting location for you. I have also linked a couple of installation videos for you.
    view full answer...
  • Towed Ford Explorer Battery is Dead After A few Hours of Flat Towing Behind Itasca Motorhome
    The Roadmaster InvisiBrake Supplemental Tow Bar Braking System # RM-8700 is designed to deliver a trickle charge from your running motorhome's electrical system to your toad's battery while you're underway. This power feed is dependent on good ground connections between both the motorhome and InvisiBrake, and between the InvisiBrake and the toad. You can check to make sure all electrical connections are sound and that there is no corrosion on connectors that might be impeding the charging...
    view full answer...
  • How is Invisibrake Powered if 2015 Jeep Wrangler's Battery is Disconnected to Flat Tow
    I spoke with my contact at Roadmaster and he said that if you disconnect the battery of your 2015 Jeep Wranger as per flat towing instructions your Jeep will be off, however since the Invisibrake supplemental braking system, # RM-8700, is wired directly to the battery it will still be sending a 12 volt, 2 amp trickle charge to the power the Invisibrake's Battery Protection feature function. I have included a video of the Invisibrake being installed on a 2013 Jeep Wrangler as well as a...
    view full answer...
  • Determining Braking Pressure on Roadmaster InvisiBrake Supplemental Braking System # RM-8700
    On the Roadmaster InvisiBrake Supplemental Braking System # RM-8700 you will adjust the braking pressure between the 5 psi minimum and the 80 psi maximum based on the behavior of your specific Wrangler XL as well as personal preference. The factory setting may or may not be appropriate and there is no one specific setting for your vehicle that will apply in all cases.
    view full answer...
  • Can the Roadmaster InvisiBrake # RM-8700 be Used on a 2008 Ford Edge
    According to Roadmaster, the InvisiBrake Supplemental Braking System, # RM-8700, can be used on a 2008 Ford Edge. I have attached a link to the installation instructions for you.
    view full answer...
  • Factory Preset PSI Rating for the Roadmaster InvisiBrake Supplemental Braking System # RM-8700
    I spoke with my contact at Roadmaster and he informed me that the factory preset PSI rating that the Roadmaster InvisiBrake Supplemental Braking System # RM-8700 is about 60 psi. Which is also the same rating they used when they used this product with a 2011 Jeep Wrangler Unlimited like what you have.
    view full answer...
  • Items Needed When Towing A Ford F-250 With Another Ford F-250
    The proportional brake controller you have in your Ford F-250 is intended to be used when towing a trailer, and is not designed to work to control brakes on a towed vehicle. I have attached a link to a helpful article that explains brake controllers you can check out. If you are planning on flat-towing a vehicle it requires 5 things. Those are base plates on the towed vehicle, a tow bar to attach between the towing and towed vehicle, safety cables, lighting on the towed vehicle, and now...
    view full answer...
  • Can Roadmaster Invisibrake # RM-8700 Fit Under Drivers Seat of 2014 Ford Edge SEL
    In almost every case, the Invisibrake can indeed install under the driver's seat. The control box measures 8-3/4 inches wide by 8-3/4 inches long by 2-3/4 inches tall. You can measure the space under the seat to see if you have the necessary space. If for some reason it won't fit there, it can be installed under the rear seat. There will be enough cable supplied to reach either location. I have confirmed this with Roadmaster.
    view full answer...
  • Initial Brake Pressure Setting for the Invisi-Brake System # RM-8700
    The braking pressure that the Invisi-Brake System # RM-8700 that you referenced comes from the factory set at is the most universal setting that works for most applications. You will want to test your setup using the preset setting and compare the stopping power to how the RV stops without a vehicle behind it and adjust as necessary. For further info check out the installation instructions I attached to the right.
    view full answer...
  • Having Difficulty Installing Cable Clamping for InvisiBrake System # RM-8700 on a 2015 Jeep Cherokee
    I spoke with my contact at Roadmaster and in order to complete the installation of the InvisiBrake Supplemental Braking System, # RM-8700, in your 2015 Jeep Cherokee, you will need to make sure that the bracket is as close to the brake pedal as possible and drill a hole through the brake pedal arm. Please feel free to send me an email if you have any additional questions.
    view full answer...
  • Invisibrake Break A Way Switch Mounting Location Recommendation
    When mounting the breakaway switch of the Invisibrake part # RM-8700 Roadmaster states to choose an area you can easily reach, near the center of the vehicle, with a surface of sufficient strength to hold the switch firmly in place, so that the break away pin will pull freely from the switch. Mount the switch in a horizontal position, with the break away pin facing the motorhome. Make certain that the break away pin can be pulled freely away from the towed vehicle, without any obstructions. After...
    view full answer...
  • Where Does the Air Used By the Roadmaster InvisiBrake # RM-8700 Come From
    The Roadmaster InvisiBrake you referenced, part # RM-8700 has a small compressor in the control box that provides the necessary air pressure to actuate the towed vehicles brakes when needed. Although the box is typically mounted under the seat, it can be mounted anywhere in the vehicle that allows access to the adjustment knob. I have linked you to an install video showing the InvisiBrake being installed on a 2002 Jeep Liberty. Although the install is for a different vehicle than yours,...
    view full answer...
  • Where to Mount Air Cylinder from Roadmaster InvisiBrake System, Part # RM-8700, in 2012 Honda Fit
    Air cylinder placement is limited by the length of the actuator cable; it is important to proper operation that this cable not be required to bend any more than absolutely necessary. Usually a good spot for the air cylinder is under a driver side door threshold; the size and shape of the cylinder often make this location the best option since it keeps the cylinder close enough to both the brake pedal and actuator box. The actuator cable cannot be extended. Typical installations for the...
    view full answer...
  • Recommendations for Installation Locations of Invisi-Brake Controller on a 2013 Ford Explorer
    You can install the controller basically wherever you think will work the best for you, it is not required that you put it behind the front seat like the video I attached shows, but you may find that installing it on the driver side of the vehicle will make the install easier. You could try behind the rear seats or even the cargo area. You might have to get a little creative, but you should be able to find a suitable location in your 2013 Ford Explorer.
    view full answer...
  • InvisiBrake Troubleshooting, Light Came On for 200 Miles then Went Off
    I spoke to my contact at Roadmaster and when I described your situation to him he said that as long as the Invisi-Brake was installed correctly you would just need to turn up the pressure slightly to get it to want to function more consistently.
    view full answer...
  • Cannot Adjust Brake Pressure on Roadmaster InvisiBrake Supplemental Braking System
    The 20 amp fuse for the Roadmaster InvisiBrake Supplemental Braking System part # RM-8700 could be installed anywhere on the red power wire that goes from the battery to the InvisiBrake controller but if it was installed correctly then it should be 6" away from the positive terminal on the red wire above. I have attached a photo of this for you. However, with that being said this would not really have an affect on the brake pressure adjustment knob not working correctly. If this is your...
    view full answer...
    Image 1 for
  • Troubleshooting Invisi Brake From Roadmaster Where Compressor Does Not Come On
    In the installation instructions for the Roadmaster BrakeMaster # RM-8700 there are two fuses wired to the air compressor circuit. One 20 amp fuse on the power wire of the battery, and a 10 amp fuse connected on the blue wire that runs from the ignition switch to the air compressor. Inspect these fuses and any poor or loose wiring connections. Try using a jumper wire 12-volt source to connect to the compressor to see if it operates. If the compressor works, then the issue is along the...
    view full answer...
    Image 1 for
  • Can Roadmaster 8700 InvisiBrake System Make Beeping Noise in Engine Compartment
    The only 2 things the Roadmaster InvisiBrake # RM-8700 has that makes an audible noise is the air compressor and the motorhome monitor that lets you know if the brakes have been activated too long. I spoke with my contact at Roadmaster who confirmed that nothing with their system makes a beeping sound. Since this is the case the Ford service department you went to either doesn't know much about the vehicle or they were just trying to move on to the next customer. I would take your vehicle...
    view full answer...
  • Will the Roadmaster InvisiBrake Release Air Pressure Over Time When Disconnected from Motorhome
    The air pressure in the Roadmaster InvisiBrake Supplemental Braking System # RM-8700 will slowly release the pressure until it is down to zero when you disconnect your 2017 Ford Focus from your motorhome. It won't drop all of the sudden once disconnected. I reached out to my contact at Roadmaster who confirmed this.
    view full answer...
  • How Does the Roadmaster Invisibrake Shut Off
    The Roadmaster Invsibrake part # RM-8700 is designed to activate the towed vehicle brakes when the motorhome sends a signal back to the operating unit to brake. Once the towed vehicle is disconnected from the motorhome, the Invsibrake shuts off and no longer activates. This is one of the only supplemental braking systems that does not require turning the system off compared to other supplemental braking systems that need to be turned off or taken out of the vehicle each time you want...
    view full answer...
  • Factory Pressure Setting for Invisi-Brake System # RM-8700
    The braking pressure that the Invisi-Brake System # RM-8700 that you referenced comes from the factory set at is the most universal setting that works for most applications, 60 psi. You will want to test your setup using the preset setting and compare the stopping power to how the RV stops without a vehicle behind it and adjust as necessary.
    view full answer...
  • Does Negative Battery Cable of 2017 Ford Edge Need to Disconnect When Flat Towing with Charge Wire
    The recommendation for disconnecting the battery of a vehicle when flat towing like on your 2017 Ford Edge is so that you can put the key for the vehicle in a position that allows the steering wheel to be unlocked and not drain the battery. If you have a charge wire ran to the Ford Edge that might offfset some of the drain but most likely it would not be quite enough so we recommend sticking with what the manufacturer recommends.
    view full answer...
  • No Audible Alert in RV after Depressed Brake Pedal on Roadmaster InvisiBrake
    I called my technical support contact at Roadmaster and they informed me that it is likely that you have just switched the wires that go to both the LED monitor and audio board on the Roadmaster InvisiBrake Supplemental Braking System part # RM-8700. I would first try to switch the wires to see if that fixes your problem. If that doesn't work then you will want to inch forward a bit and hold the brake pedal to see if the alarm sounds. If neither of these options work then you would need...
    view full answer...
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