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Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor - Proportional

Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor - Proportional

Retail:$1,590.00
Our Price: $1,349.00
You Save: $241.00
Tow Bar Braking Systems

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Demco Power Assist Brake Compatible Tow Bar Braking Systems - DM86VR
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Get automatic, proportional braking with a system that never has to be removed, replaced, or reset. The DUO activates when your RV brake lights go on and the inertia sensor detects deceleration. No false braking. Wireless braking monitor included. Great Prices for the best tow bar braking systems from Demco. Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor - Proportional part number DM86VR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Demco Tow Bar Braking Systems

  • Brake Systems
  • Hydraulic Brakes
  • Proportional System
  • Demco
  • Fixed System
  • One Time Set-Up
  • Power Assist Brake Compatible

Get automatic, proportional braking with a system that never has to be removed, replaced, or reset. The DUO activates when your RV brake lights go on and the inertia sensor detects deceleration. No false braking. Wireless braking monitor included.


Features:

  • Supplemental braking system applies towed vehicle's brakes in proportion to braking action of RV
    • Towed car's brakes are activated at the same time and with the same intensity as those in your motorhome
  • Inertia sensor detects deceleration and signals system to activate brake pedal with proportionate amount of pressure
  • No false braking
    • Coach brake light must be on for system to activate towed car's brakes
  • Sensitivity control on the inertia sensor lets you regulate how aggressively the towed car's brakes activate
  • One-time setup - no need to remove or to activate each time you tow
    • Operating unit and actuating cylinder stay hidden so everything is out of your way when driving
    • Inertia sensor mounts in the cab of the vehicle
    • System automatically functions when towed vehicle is hitched to RV
  • Wireless braking monitor mounts in your RV and alerts you when the brakes are being applied in the towed car
    • Transmitter connects to towed car's brake light switch to ensure proper reading
    • LED lights blink and are easily visible while you are driving
    • Audio tone provides a secondary, audible alert
  • Vacuum pump restores towed car's vacuum after each braking event
    • Less force is needed to move the brake pedal in the car, resulting in more natural braking and less risk of damage
    • Compatible with vehicles that have continuous-power-assist brakes
  • Breakaway included
  • Necessary installation components and instructions included
  • Made in the USA


Specs:

  • Operating unit dimensions: 8" long x 5" wide x 2-1/4" tall
  • 5-Year warranty


A supplemental braking system is a must when towing a car or truck behind your RV. Without it, the weight of the towed car can create a safety hazard, strain your RV's brakes, or affect your RV's warranty. Most states require a supplemental braking system.


Automatic, Proportional Braking

There are many supplemental braking systems available to RV owners who choose to tow a car. Stay-IN-Play DUO combines the best features into a single system that is both automatic and fully proportional. This system relies not only on your towed car's momentum to activate, but also on your RV's brake light signal. As a result, the DUO will automatically activate any time you engage your RV's brakes, so long as there is enough deceleration for the system to detect. And when it does activate, your towed car's brakes will engage with an intensity that matches the slowing or stopping action of your RV.


An inertia-sensing mercury switch inside the DUO's controller is what makes this system proportional. This switch reads and interprets changes in forward momentum that occur when your towing setup decelerates. As your RV and car slow down, this switch sends a signal to activate your towed vehicle's brake pedal with an intensity that matches the deceleration of your RV. The result is even braking across your towing setup. Whether you lightly tap the brakes in your RV or apply them hard in a panic situation, your towed car's brakes will be applied proportionately.


Dual Activation Signals

G Force Controller

The G-Force controller is responsible for sending the signal that activates the brakes in your towed car. When the coach brake lights come on, the tow bar wiring sends a signal to this controller. This signal powers the internal, inertia-sensing mercury switch, enabling it to detect deceleration. If a change in forward momentum is detected, the G-Force controller initiates the braking process by sending an activation signal to the system's operating unit.


If the mercury switch is powered but there is no change in momentum, the system will not activate the towed car's brakes. Likewise, if a decrease in forward momentum occurs but there is no brake light signal from the RV, the inertia sensor will not be able to register the deceleration, and the system will not activate the towed car's brakes.


Because the DUO will not work without your RV brakes being applied, there is no false braking. When you downshift in your RV without applying the brakes, the DUO will not mistakenly depress your towed car's brake pedal because that first activation signal is not there. And because there is no time delay, this proportional system delivers instant braking in an emergency.


Note: The G-Force controller mounts in the towed car and must be pointed it in the direction of travel - with the toggle switch facing the rear of your vehicle - for the internal sensor to function properly.


Sensitivity Adjustment

You can adjust the sensitivity of the inertia-sensing mercury switch with a knob on the front of the G-Force controller. Adjusting the sensitivity lets you decide how intense the change in momentum must be for the sensor to respond. Adjust it to fit your personal preference so that you can get a customized braking experience. Set the sensitivity low and the DUO will only respond when you forcibly step on your RV's brake pedal. Set the sensitivity high and it will respond when you merely tap your RV's brakes.


To fine-tune the sensitivity, first move the knob all the way to its most sensitive setting. From there, you can apply the coach brakes and gradually move the knob until you get the setting right where you want it. You only need to set the sensitivity upon initial setup.


Permanent Installation with Concealed Components

Operating Unit

The operating unit receives the signal from the G-Force controller to activate. It then delivers air through a hose to the actuating cylinder, which depresses the towed car's brake pedal with a pressure that ensures your car will brake in proportion to the deceleration of your RV.


DUO Under Hood

Once you install the Stay-IN-Play DUO's operating unit under the hood of your towed vehicle, it stays concealed. Not only will it be installed and ready for the next time you want to tow your car, but it will also be out of the way so that you won't notice it when you drive your car normally. In addition, there is no need to constantly set up or remove this system. As a result, you don't need to worry about where to store the components when you're not towing.


Actuating Cylinder

Small Cylinder

The actuating cylinder depresses your towed car's brake pedal upon receiving air from the operating unit. This small cylinder stays mounted on the arm of your towed car's brake pedal at all times and will not interfere with braking while driving.


Actuator on Pedal

Mount this cylinder so that it is perpendicular to the firewall when you depress the brake pedal. A clamp anchors the actuator to the firewall.


To connect the actuating cylinder to the operating unit, you will need to run the included air hose through your towed car's firewall. You can usually create the necessary, small opening without drilling. In most instances, you can cut a slit in the hood release cable grommet. Simply cut the end of the air line at an angle to poke it through the slit.


Vacuum Pressure Creates Smooth Braking

Normally, when you activate the brakes in your vehicle, a vacuum multiplies the pressure you apply to your brake pedal, creating the force necessary to stop the full weight of the moving car. On most cars and trucks, this vacuum-assist function does not work when the engine is off. As a result, many supplemental braking systems on the market have to use an excessive amount of pressure to effectively depress the towed car's brake pedal.


The Stay-IN-Play DUO's operating unit ties into your car's vacuum line and uses a built-in vacuum pump to activate the vacuum-assist function of your car's brakes when it's being towed. As a result, the actuating cylinder of the Stay-IN-Play DUO does not need to apply extreme force to the brake pedal to achieve proper braking. The Stay-IN-Play DUO will replenish your towed car's vacuum after each braking event so that you will get smooth, even braking every time.


Built-In Safety Features

Most supplemental braking systems have monitors that tell you when the braking system is activated, regardless of whether or not the towed car's brake pedal is actually being depressed. This means that you might receive an alert telling you that your car is braking when it really isn't. But with the Stay-IN-Play DUO, you get Demco's wireless Coachlink monitoring system. This system ties into the brake light switch on your towed car so that you'll be notified only when your towed car's brake pedal is being engaged. No false notifications.


Demco Coachlink installed

The Coachlink monitor mounts in your RV, plugging easily into your 12V accessory socket for power. The built-in LEDs will illuminate to inform you when your towed car is braking. And an audible alert - which can be easily turned off, if you'd prefer - serves as a backup notification. To receive these notifications, just install the transmitter in your towed car. No additional wiring connections are needed between your car and RV as all communication happens wirelessly.


The breakaway system ensures that your car will come safely to a stop if it accidentally detaches from the RV while you are towing. A switch mounts to the front of the towed vehicle. This switch - which is wired into the operating unit - includes a pin that connects to your RV's hitch receiver with a breakaway cable. If the car separates, the cable pulls the pin from the switch, causing a signal to be sent to the operating unit.



9599018 Demco SBS - (Formerly SMI) Stay-IN-Play DUO Supplemental Proportional Braking System with Coach Link Indication System

Item # DM86VR

Installation Details DM86VR Installation instructionsAlternate Instructions DM86VR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor - Proportional - DM86VR

Average Customer Rating:  4.8 out of 5 stars   (504 Customer Reviews)

Get automatic, proportional braking with a system that never has to be removed, replaced, or reset. The DUO activates when your RV brake lights go on and the inertia sensor detects deceleration. No false braking. Wireless braking monitor included.

by:
2023 Chevrolet Equinox

Installed 6/17/23 on a 2023 Equinox LT (AWD). Installation was pretty straight-forward. I mostly followed etrailer's videos. Note that the pneumatic cylinder needs to be mounted fairly high on the brake pedal arm so you have a 'square' profile to clamp onto. This vehicle has an electronic brake booster rather than pneumatic, so follow Demco's instructions regarding this variation. The wireless coachlink works great. I couldn't be happier with this system.



by: 10/13/2023

Very easy install, and the videos on E-trailer helped a bunch! I opted to put the controller and wireless link on the passenger side, because there was more room there, but the controller is still properly orientated. Be sure to leave enough slack in your wiring if you decide to mount the operating unit on the fuse box, so you'll be able to remove the cover later. Happy trails!



by:

These installation photos are for the Demco Duo Play braking system install on a 2018 Ford Fusion Platinum Energy with push button start.

Jeffrey

11/19/2022

I works perfect every trip. I do a hard braking test at the beginning of every trip. The wireless monitor in the motorhome immediately reports the functionality of the braking system. I am very satisfied with this product. I installed everything myself.



by:
2017 Mini Cooper

The Duo System took about 8 hours to install on a 2017 mini cooper s 4 door due to tight space everywhere. The etrailer video was very helpful although I atteached to vaccuum line in a much easier location up next to the Vaccuum unit on the firewall. The video also recommended using heat-shrink crimp connectors which are not supplied by Demco. The fuse-holder is also crappy and the 20A fuse has slipped out of the holder with the cover closed, so I ordered a waterproof 20A circuit breaker and tossed the unreliable fuse holder which failed on my first trip. Demco also provides no indicator LED to show that the braking system switch is on and it is powered up and ready to function. This is asafety issue that should be addressed. For the cost of this system, these few simple enhancements would ensure that it works reliably for many years.



by:
2018 Jeep Wrangler

Works great. It takes some time to install but worth it for the ease of use after. I installed the same system on my 2018 wrangler without the coach link monitor, used it over 4 years and 18,000 miles without a problem. I like the addition of the coach link monitor as the light is right in front of you.

Michael

9/9/2023

1 year with 4,000 miles of use and still working great. No problems.

Etrailer Expert

Mike L.

11/1/2023

@Michael Niice! Glad to hear that!!


by:

Extremely difficult to install. Installation Instruction need to be interpreted rather than followed.
However, once installed, braking on the toad is amazing. I went from no brakes to this brake system. Significant difference.



by:
2018 Jeep JL Wrangler Unlimited

DIY installation on my 2018 Jeep JL unlimited 4-Dr went perfectly. I watched the video (a 2018 like mine) and followed along as I installed and it turned out just as the video showed. I added marine grade shrink wrap on all of the wire crimps, added the coiled split conduit wherever I could. Trying to Zip tie the wireless transmitter under the dash wasn’t working out for me so I cut two strips of double sided automotive tape and secured it to the metal dash support. Then I installed the towed vehicle wiring kit again following the Jeep JL videos. A lot of crawling around fishing the wiring through the side box railing…but doable. The only tedious part of this installation was finding good spots for mounting the emergency brake plug and the 6-way outlet on my heavy duty aftermarket winch mount bumper. My towed vehicle battery maintainer wiring should arrive shortly to complete my wiring.
Lastly, I ordered adapter 1” D-Ring brackets to fit the Roadmaster Nighthawk tow bar (checked with Cliffs in Scottsdale to inspect my aftermarket bumper first)….fit like a glove and easy to install on the tow bars. Fingers crossed and did the function tests and all worked as designed! I would add photos but the videos look identical to my application.



by:
2019 Ford F-150

Appears to be working as expected, will be going on our first long trip in April to confirm.
instructions are generic so some judgment calls needed to be made for my 2019 F150 Raptor. I ended up placing the vacuum hose in the booster in the sensor hole, and placing the sensor at the end, rather than splicing into the preformed hose. Not a project to rush thru.

Victor

3/10/2023

Last April 2022 we went on a 2 month 6000 mile journey, pulling steep grades, raging thunderstorms, and some hot and dry days, all without any issues with the braking system. Very satisfied.



by:
Jeep

This system is time consuming to install but with the help of the etrailer videos the install went well. I really love the system. I have towed my Jeep with my RV a few times down some really steep grades and the system works awesome. The beauty of the system is when you are done towing, you disconnect the tow bars and safety cables, unplug the breakaway cable and brake/turn signal cable, switch off the control unit and your done! Preparing for the tow is just the reverse. I did consider many other types of systems and models, but I'm really happy with the Demco Stay-in-Play Duo. The Wireless Coachlink monitor is also awesome.`

Hans

4/17/2023

I have used the system several times over the last year and I am very pleased on how great it works. We have really tested the system on some steep grades with no problems.



by:

What a great auxiliary braking system. I was a little apprehensive about installing this system myself on my 1999 Jeep TJ SE, but I found hte instructions to be well written and once I read through them several times and then took my time to follow them step by step the overall installation was pretty straight forward. I wont lie the installation took about 8hrs for me to complete, with one call to their support line which was excellent by the way!I had a question on the diodes. They answered my question and offered great support. Once installed and calibrated, the braking system worked as expected, actually better than expected. I really like the remote monitor which allows me to see when the brakes are applied on the Jeep from within the cab of my RV. I highly recommend this system....



by:

This is a really nice braking system. It works EXACTLY as described. Engine breaking does not trigger breaking (because it's tied into the break light circuit). And breaking truly is proportional. Light braking and it does not engage activate braking. The remote wireless coach receiver shows you how hard the car is breaking, and IS proportional to the breaking in the Coach. When the car is breaking the wireless receiver shows you, at three levels (the number of lights lit from one light to three) how hard the towed is braking. i HIGHLY recommend the wireless unit for breaking notification.

Instructions were very clear. I studied my 2004 Pontiac Vibe (same as Toyota Matrix), and watched a bunch of online videos on installing this product. This is a particularly good car for a toad, because it is so light. (2700 lbs curb weight -- and it rolls really freely).

Installation was particularly painful under the dash where (as a tall person) I had to contort myself into all kinds of uncomfortable shapes with various padding) to reach up under the dash panel . There is just no easy way I could find to remove the lower dash panel without taking about whole dash board. So just figuring out the cold side of the break switch was very difficult. It was impossible to get a probe on the break light switch plug. I ended up clipping a wire junction connector on to the (green wire coming of the brake switch after unplugging the wire harness) and then probing that after plugging it back in. I guessed right, It's the green wire that is the cold side of the switch. For someone who reads this you don't have to guess. I've done it for you

On this car I was concerned about going through the firewall and puncturing the break booster when mounting the cable terminal for the actuating cylinder. In the end, where I needed to go through the firewall was nowhere near the booster. It also turned out trying to use the self taping screws was just too hard. I wanted to use the reinforcing plate, but ended up loosing it under the carpeting. Finally I decided to just drill a 1/4" hole through the firewall (just northwest of a little dimple in the firewall), and bolt the cable cable terminal to the fire wall with a 1/4x20 combo head machine screw, and a fender washer, lock washer, and nut on the engine side of the firewall. I put silicone on the washers and nut, to prevent corrosion. I had just enough room under the car to get a wrench onto it. It would have been nice to have a car lift in my garage, but I did this work by blocking the car up on jack stands. My son held the bolt on the inside of the car. while I tightened the nut on the engine side of the firewall.

Another problem was: where to mount the operating unit in the engine compartment? I struggled with this until I found an online video of an installation on a Honda, where the tech mounted the operating unit to the engine cover. This worked out well, and made for easy routing of the vacuum lines both to the vacuum line between the engine and the brake booster, and through the firewall grommet to the actuating cylinder.

I mounted the wireless sending unit on the dash at the driver's A pillar, and the control unit on the passenger side, where there was much more room, routing the wires behind the center console over the the drivers side to go through the firewall. Calibration (adjusting the control unit position) worked exactly as describe. I set it and I was done.

In the end, though a painful install process, ESPECIALLY above the foot pedals under the dash, I know I am going to LOVE this system. To setup for towing: just flick the switch on the control unit, and hook up the car. No other special setup is required.



by:

Braking system worked great on my Jeep. We towed the vehicle on a 6000 mile journey this year. We were up and more importantly, down the Rocky Mountains and the braking system never failed us. Would definitely recommend.



by:

Etrailer videos made this a pretty simple install. So far so good.

Justin

10/12/2023

Everything is working how it should be.

Etrailer Expert

Mike L.

11/4/2023

@Justin That's great to hear! We're glad your Demcon # DM86VR braking system is working well for you!


by:

eTrailer was very helpful in choosing the correct hitch for our rv and car. They also provided a special brake application in the car that makes it super easy for toad braking.
I am 72, and I hook up this toad and pull it with confidence. The instructions to hook up the toad was presented with ease. They knew exactly what they were doing, and we didn't rush through the demonstration. I would recommend eTrailer to anyone.



by:

Been a year now. Unit works as well as ever. Installation was not bad. Have a 4 post lift so wiring the rear lights on my 2022 wrangler was simple. Braking while driving motor home needed some fine tuning before hitting the road but once dialed in it works great.



by:

I like the way it works - much better than the Brake Buddy I used b before.



by:

Great braking system. Installation directions were good and clear, but there are a lot of steps. It is easy to adjust properly once installed and has worked flawlessly for 2500 miles towing my 2015 Subaru Forester.



by:
2023 Chevrolet Equinox

Product went in very smoothly. The video on E-trailer website was very helpful to aid in the installation process. Thank you!!



by:
Jeep

Clever system that makes hooking up the Jeep a breeze. It’s fairly easy to install and has so far been rock solid reliable.



by:
Jeep

Have been using the Demco for a year now and have nothing but praise for this product. Mine is installed on a 2021 Jeep Gladiator. I have been towing vehicles behind my motorhomes for several years and found this system is much easier to activate. I highly recommend this product to anyone looking for a braking system for their tow vehicle.



by:

Outstanding service on tracking down the brake switch assembly and having it delivered so quickly. Thank you



by: 04/08/2021

Works great. Self installed on 2018 Ford F150 without much difficulty. I recommend watching etrailer install video. Mine has wireless duo monitor. Extra care needs to be used when splicing into tiny brake light switch wire. If bad connection is made truck will not shift out of park.



by:

etrailer failed to get this part for UPS and now a day late. The other two parts arrived on time. When I checked with etrailer on 4/18/2023 was assured by Ja*** that parts would arrive and she even called me a liar. Worse yet a Supervisor RO** promised that she would be there today left two voice mails and spoke with another supervisor and still got the run around. So POOR Customer Service from etrailer and UPS sent me pickup times. So yes [etrailer] has no customer service



by:
2014 Honda CR-V

This system was fairly easy to install. However, the installation took some time but if you followed the directions and review the video it should not be a problem to self-install. The system does seem to be a bit finicky regarding the braking adjustments. The towed vehicle is supposed to apply the brakes at 20MPH or above but it seems that the aux brake engages at lower speeds. Additionally, depending on the slope sometime the system will appear to engage when the left or right blinker is on. No matter how I adjusted the Inertia sensor I could not find what I though should be the sweet spot. Overall, I am happy we had the aux brake when traversing some of the mountain passes out west.

Etrailer Expert

Jenny N.

8/9/2022

You mentioned that the system appears to engage when the left or right blinker is on. We have reached to Demco before about this matter and they stated that the pulsing that you have been experiencing when your turn signal is activated is normal. It is typically caused by the sensitivity being cranked up too high and near the max setting. I recommend continuing to adjust the sensitivity of the inertia-sensing mercury switch with a knob on the front of the G-Force controller until it stops engaging when the blinkers are on. To fine-tune the sensitivity, first move the knob all the way to its most sensitive setting. From there, you can apply the coach brakes and gradually move the knob until you get the setting right where you want it. You only need to set the sensitivity upon initial setup. If this does not solve your issue, then please reply back and we can keep troubleshooting.



by:

The system is definitely cost effective and works well. More importantly, I had some issues because I tow a very small car. The customer service from Demco was very good. They walked the installers through how to deal with the challenges.

Steve

11/7/2022

I now have a DemconStay-N-Play system on the Jeep Wrangler I replaced the Fiat 500 with as my tow vehicle. My experience has been much the same and the braking assistance.difference is now more pronounced. My motor home stops as though there is now tow vehicle and I believe even decreases total stopping distance of both vehicles. Tiffin Allegro OPen Road 32 SA w ford V-10, 24,00 lb chassis.


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

  • Is A Tow Bar Braking System Required To Flat Tow A 2020 Jeep Wrangler
    All states, besides Missouri, have varying weight requirements for braking systems. If you could provide the state you're planning on towing through I can find that specific state's requirement or you can check with your local DOT. That being said I HIGHLY recommend using a braking system to ensure the safety of you and your motorhome and towed vehicle. The Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor # DM86VR is a great choice for your 2020 Jeep Wrangler...
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  • How Does Demco SBS Stay N Play Detect How Hard to Apply Trailer Brakes
    We do carry the Demco DUO Stay N Play part # DM86VR which we has an internal accelerometer that senses inertia changes and combined with a brake signal will work to apply the towed vehicle brakes with a similar intensity. It is mercury switch inside unit that accurately detects the braking. We do not carry the Shadow system so we don't have much info we can give on it.
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  • Does Demco Stay-IN-Play DUO Braking System Fit 2019 Ford Fusion Titanium Hybrid
    Braking systems like this are universal and not custom fit for any specific vehicle, so yes, the Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor # DM86VR does indeed fit your 2019 Ford Fusion Titanium Hybrid.
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  • Stay-IN-Play DUO Not Working Downhill
    Thank you for purchasing the Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor # DM86VR directly from etrailer. The issue is almost certainly the G-Force controller not being oriented properly; per Demco, "Check the orientation of the G-Force Controller. It may need to be tipped slightly forward."
    view full answer...
  • How to Get the Demco Stay-IN-Play Installed
    Yes, we do! To access our network of reliable installers all over the country you will want to go to the left hand side of the Item # DM86VR product page. Underneath the installation videos is a blue link that says Locate installers near me. You will want to input your zip code to get a list of installers in the Leesburg area.
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  • Brakes do Not Apply With Stay-In-Play When Pressing Brake of Car
    This is normal; the brakes on your vehicle will not apply with the Demco Stay-IN-Play DUO Supplemental Braking System # DM86VR when you are not moving.
    view full answer...
  • Troubleshooting Check Breaking System Warning for Demco Stay-IN-Play DUO
    The Check Breaking System warning message you're getting has more to do with the installation of the Demco Stay-IN-Play DUO Supplemental Braking System # DM86VR itself and not your specific 2022 Ford Ranger. The warning you're getting likely means you have a vacuum leak somewhere so you need to check your connections for the vacuum hoses. Look at the hose between the operating unit and your tee connection and also make sure the black end of the check valve is facing the operating unit....
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  • Best Braking System For Flat Towing 2024 Jeep Wrangler
    The best supplemental braking system for flat towing your 2024 Jeep Wrangler is from Demco, the Stay-IN-Play, which is the following part number: - Demco Stay-IN-Play DUO Supplemental Braking System # DM86VR The reason the # DM86VR is the best is because it gives your Jeep braking proportional to that of your motorhome. So when you hit the brakes on your motorhome, your Wrangler is going to get the same amount of braking power, resulting in much smoother braking than other systems.
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  • Will Wireless Signal of SMI DUO Work on 37 foot Long RV
    The wireless signal of the Demco Stay N Play DUO part # DM86VR that you referenced would easily work on your 37 foot RV. This system has a really great reception overall and we've not had any issues with customers who reported having problems.
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  • Troubleshooting Pulsing Brakes With The Demco Stay-In-Play Braking System While Turn Signal Is On
    Demco stated that the pulsing that you've been experiencing with the Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor - Proportional # DM86VR when your turn signal is activated is normal and usually caused by the sensitivity being cranked up too high and near the max setting. You can adjust the sensitivity of the inertia-sensing mercury switch with a knob on the front of the G-Force controller. Adjusting the sensitivity lets you decide how intense the change...
    view full answer...
  • Are Ground of Operating Unit & Controller of Demco Stay-IN-Play DUO Connected
    The 12 volt and ground wires between the operating unit and G-Force controller of the Demco Stay-IN-Play DUO Supplemental Braking System # DM86VR are isolated with no breaks and should not tie to the chassis instead of routing between each other. The indicator light does have to tie into the ground between the two units as well.
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  • How Does Remote Brake Monitor Work on Stay-IN-Play DUO
    The Stay-IN-Play DUO, # DM86VR, ties into the brake light switch on your towed car so that you'll be notified only when your towed car's brake pedal is being engaged. There is an inertia-sensing mercury switch inside the DUO's controller is what makes this system proportional. This switch reads and interprets changes in forward momentum that occur when your towing setup decelerates. As your RV and car slow down, this switch sends a signal to activate your towed vehicle's brake pedal with...
    view full answer...
  • Does Demco Stay N Play # SM99251 Fit 2013 Ford Edge
    The Demco Stay N Play # DM86VR is definitely a confirmed fit for your 2013 Ford Edge I apologize for any confusion on that.
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  • Demco Stay-IN-Play DUO Pulsing On/Off When Turn Signal Is Activated
    This is actually a fairly common issue with the Demco Stay-IN-Play # DM86VR, and there are solutions. Since the turn signals and brake lights normally use the same wires, they use variable voltage to activate each circuit. The system is seeing a signal less than 12v and is trying to activate. What you'll need to do is reset the GFC (G-force controller) slightly to the "more" position. Then, go through the GFC set-up again which is step 12 in the instruction manual. This time, raise the...
    view full answer...
  • Does SMI DUO Stay N Play Create Vacuum for Vacuum Assist Brakes
    So the DUO does not need your vacuum assist brakes to have vacuum to push the brakes hard enough to stop the vehicle. The system basically is strong enough to be able to press the pedal hard enough without the vacuum assist.
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  • Demco Stay-IN-Play G-Force Controller Toggle Switch Positioning
    The G-Force Controller # DM78VR for the Demco Stay-IN-Play DUO Supplemental Braking System # DM86VR is what is used to switch on and off the braking system when you are flat towing or not. It also is used to adjust the braking sensitivity to ensure that the brakes are not activating to hard or soft. You want the switch in the off position when you are using your 2003 Jeep Grand Cherokee for everyday driving. It will be switched to on when you are flat towing your Jeep.
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  • Does the Demco Stay-IN-Play DUO Require Installing Anything In My Coach
    This is partially correct. The Demco Stay-IN-Play Duo Supplemental Braking System w/ Wireless Coachlink Monitor - Proportional # DM86VR installs in your tow vehicle and not in the coach, however it's not compatible with air brakes. Instead of the Stay-IN-Play, you'll want to use the Demco SBS Air Force One system # DM26VR. It will work very similarly and provide proportional braking for your tow vehicle, in a permanently installed braking system. The wireless CoachLink sends a signal to...
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  • Will Demco Stay-IN-Play DUO Supplemental Braking System Work On Motorhome with Air Brakes
    The Demco Stay-IN-Play DUO Supplemental Braking System part # DM86VR is designed for motorhomes with hydraulic brakes and the Demco SBS Air Force One Supplemental Braking System part # DM26VR is designed for motorhomes with air brakes. The two cannot be substituted. The Air Force One would not even be able to be installed on a motorhome with hydraulic brakes and if you were to install the Stay-IN-Play on a motorhome with air brakes, the system would not have enough power to function properly.
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  • Brake System Recommendation for Flat Towing a 2023 Ford Bronco
    I really like the fixed braking systems because they are a one-time installation, you don't have to store it when not in use, and the steps to get it ready for towing is much quicker than a proportional system. Demco has a great system that I recommend installing on your 2023 Ford Bronco, you just need to choose which system matches the brake type on your motorhome: - Motorhome Hydraulic Brakes # DM86VR - Motorhome Air Brakes # DM26VR
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  • Can I Mount the Demco G-Force Controller Upside but Still Facing the Rear?
    Thanks for the pictures! You can't mount it upside down. There's a mercury switch in the G-Force Controller item # DM78VR which is what senses the deceleration and triggers the braking system. The system works off of inertia so it has to be mounted in the correct orientation with the toggle switch facing the rear of the vehicle and the controller being level. I have linked an installation video below our guys did on a 2020 Wrangler and they go over this step at the 8:40 mark. This being...
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  • Best Supplemental Braking System For a 2023 Ford F-150 When Flat Towing
    The Demco Stay-IN-Play DUO # DM86VR and Air Force One # DM26VR are our best supplemental braking systems for your 2023 Ford F-150. The Stay-IN-Play DUO is for when your motorhome has hydraulic brakes while the Air Force One is for motorhomes with air actuated brakes. Both systems include the wireless Coachlink monitor which allows you to see when the brakes are activated. This will give you the confidence of knowing you are not destroying the brakes on your F-150 or your motorhome.
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  • What Settings Should I Use on My Flat-Towed Vehicle when Towing?
    There are some factors to consider when determining what settings you should use on your towed vehicle. The first thing to consider is that all of the functionality of your towed vehicles options are outlined in the owner's manual of the vehicle. If you cannot find the switches that you mention in the manual, it is highly probable that those switches and functions were added as by the RV dealer. With that being said, the picture that you attached of your vehicle's braking system is the...
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  • Troubleshooting the Auto-Stop-Start of the Demco Stay-IN-Play DUO Supplemental Braking System
    Sorry to read you are having an issue with the installation of your Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor, # DM86VR. I contacted the Demco Tech Reps and they have a suggestion, replace the rubber grommet in the vacuum booster. They stated that if you used the Demco Vacuum Connection Tee Fitting # DM6257, which you did, then about the only thing that could potentially be causing a vacuum leak would be the rubber grommet in the vehicles brake booster....
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  • Vacuum Line Fitting Needed To Install The Demco Stay-In-Play In A 2020 Ford F-150
    Demco does list in the installation manual for the Demco Stay-IN-Play DUO Supplemental Braking System # DM86VR that newer Ford's may need an additional check valve due to Ford using two vacuum lines, but I called my contact at Demco and confirmed that you would only need just the Demco Vacuum Connection Tee Fitting # DM6257 that you referenced. The line is going to be a hard plastic and the tee fitting will slide right over it for an easy installation. Page 16 of the manual will walk...
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Do you have a question about this Tow Bar Braking System?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Andrew K
Video by:
Andrew K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Thomas T
Video by:
Thomas T
Employee Ethan H
Video by:
Ethan H
Employee Samuel H
Video by:
Samuel H
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Conner L
Test Fit:
Conner L
Employee David F
Test Fit:
David F
Employee Jacob H
Test Fit:
Jacob H
Employee Ryan G
Test Fit:
Ryan G
Employee Clayton O
Test Fit:
Clayton O
Employee Bradley B
Test Fit:
Bradley B
Employee John A
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Employee Kristina F
Written by:
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Employee Mike S
Updated by:
Mike S
Employee Noah M
Updated by:
Noah M
Employee Eric H
Updated by:
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Employee Michael B
Installed by:
Michael B

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