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Roadmaster Even Brake Portable Flat Tow Brake System - Proportional

Roadmaster Even Brake Portable Flat Tow Brake System - Proportional

Item # RM-9400
Our Price: $1,463.73
You Save: $248.71
Tow Bar Braking Systems

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Portable unit gets you smooth braking without a complex installation. Measures the RV's braking and applies your towed car's brakes with the same intensity, at the same time. Easy to swap between multiple cars. Includes LCD braking monitor. Great Prices for the best tow bar braking systems from Roadmaster. Roadmaster Even Brake Portable Flat Tow Brake System - Proportional part number RM-9400 can be ordered online at or call 1-800-940-8924 for expert service.
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Roadmaster Tow Bar Braking Systems - RM-9400

  • Brake Systems
  • Air Brakes
  • Air Over Hydraulic Brakes
  • Hydraulic Brakes
  • Proportional System
  • Roadmaster
  • Portable System
  • Not Power Assist Brake Compatible
  • Recurring Set-Up

Portable unit gets you smooth braking without a complex installation. Measures the RV's braking and applies your towed car's brakes with the same intensity, at the same time. Easy to swap between multiple cars. Includes LCD braking monitor.


  • Applies towed vehicle's brakes proportionally for comfortable braking
    • Measures motorhome's braking and activates car's brakes with same intensity
    • Prevents false braking with terrain-sensing technology
  • Lets you adjust force and sensitivity for smooth braking
  • Swaps easily between multiple towed vehicles
    • Requires a second vehicle kit (RM-98400 - sold separately) for each alternate car
  • Adjusts to fit almost any car
    • Adjustable feet: sits level for optimal performance
    • Adjustable clamp: fits around almost any brake pedal
    • Adjustable seat pad: rises/lowers to brace firmly against seat
  • Monitors braking with wireless receiver - plugs into 12V accessory outlet in cab of RV
    • 3 LED lights keep you updated on what the system is doing at a glance
    • LCD screen displays detailed messages, helping you troubleshoot
    • Audio alarms alert you to problems immediately
    • Transmitter connects to brake light switch to ensure accurate reading
  • Protects against battery drain
    • Monitor alerts you to low battery level
    • Sleep mode turns system off if battery gets too low, while retaining emergency braking power
  • Includes breakaway system
  • Meets the braking requirements of both the US and Canada
  • Made in the USA


  • Dimensions: 12" tall x 11-1/4" wide x 16" long
  • Voltage: 12 volts DC
    • Requires 15 amps of power to function properly
  • Length of power cord: 42"
  • Max amperage draw: 10.8 amps
  • Idle amperage draw: 47 mA
  • Weight: 17 lbs
  • Limited lifetime warranty

Note: Cannot be used with hybrids or other cars with continuous-power-assist brakes.

Do I Need a Braking System for Flat Towing?

A braking system is a must when towing a vehicle behind your motorhome. Without it, the weight of the towed car can create a safety hazard, strain your RV's brakes, and affect the warranty of both your car and motorhome. Most states legally require a supplemental braking system, so if you don't use one and you end up in an accident (which is more likely since your RV takes longer to come to a full stop), your insurance and liability headache just doubled. You also won't have any breakaway system; if there's an accidental disconnect, there's nothing to bring your car to a stop.

Pros of a Portable System

First, this system is great for DIYers, since you can get the basic installation done yourself. It's really only the braking monitor that will need to be wired and installed, and that's it.

Second, it offers you a lot of flexibility. It's easy to move from one toad (towed vehicle) to another - or, if you think you'll swap out your current vehicle for another one down the road, you can easily set the Even Brake up in your new toad.

How Does the Even Brake Work?

The Roadmaster Even Brake uses a built-in inertia sensor to detect when your flat tow setup begins to slow down as you apply the brakes in your motorhome. The moment the system recognizes the change in momentum, the actuator will press down the brake pedal of your toad proportionally: at the same time, with the same intensity. Meanwhile, the terrain-sensing technology keeps the unit from activating when you're just going over bumps in the road, so it doesn't brake when it doesn't need to.

Setting Up the Roadmaster Even Brake

You'll be setting up this portable unit in your toad every time you flat tow, so it's designed to be easy to do. And because it's so adjustable, it fits in almost any vehicle on the market.

Road Master Even Brake set up

Step 1: Position the Even Brake

Move the driver's seat all the way back and place the Even Brake on the floorboard. It's important that the unit sits as level as possible so the actuator has enough leverage to effectively push down the brake pedal, so adjust the feet of the unit to suit your floorboard if need be. Twist the feet by hand to get them to the height you want and then tighten the locknuts with a wrench.

Note: If your vehicle has a rubber floor mat, remove it before installation to keep the Even Brake from shifting out of position.

Step 2: Attach the brake pedal clamp

Road Master Even Brake air release button

Next you need to get the clamp securely attached to the brake pedal. Before you do anything else, make sure that all the air in the cylinder is released. Any excess air will keep it from extending properly. Hold down the air release button while you pull the clamp forward and extend the shaft, then release.

Road Master Even Brake adjustable feet

You'll pull back on the spring post to widen the jaws of the clamp. Make sure that the arrow is pointing up and the jaws close snugly around the pedal. Insert the pin into the slotted arm of the spring post to hold it in place.

Note: Some compact cars have pedals that are too small to use with the normal clamp. Use RM-9329-VW (sold separately) instead. Fits brake pedals up to 2" wide and 3" tall.

Road Master Even Brake seat pad

Now slide the driver's seat forward again so that it just touches the handle/seat pad. The handle should sit level with the part of the seat that you want it to push against. Adjust if needed.

Step 3: Plug in and power up

Road Master Even Brake seat pad

Plug the unit into the car's 12-volt outlet and plug the transmitter of the braking monitor into the unit. Press the Test button to boot up the unit and prepare it for flat towing. The Even Brake will run a self-diagnostic cycle and test out the brake clamp to make sure that everything's working properly. (If it's not, the LCD monitor will help you troubleshoot the problem.)

Once it gives you the green light, you're ready to go!

Braking Force and Sensitivity

The first time you set up the Even Brake, you'll need to program your Force and Sensitivity settings. Once you've set them, you won't need to change them unless you get a different vehicle or want to tinker with how your braking feels.

Even Brake force setting and sensitivity setting

The Force setting will determine how hard the unit presses your brake pedal. There are 3 levels: less, average, and more. A heavier vehicle will need more, while a small vehicle will need less. You can always adjust the setting up or down if it doesn't feel right.

The Sensitivity setting is very similar, with 3 levels of less, average, and more. This setting determines when the unit will activate. On the less setting, the unit will only activate when the motorhome brakes forcefully. On the more setting, it will activate when there's only a light tap on the brakes.

Troubleshoot with Digital Braking Monitor

Included with the Even Brake is a digital monitor for safety and peace of mind. This monitor, plugged into the 12V outlet in your motorhome and mounted on the dashboard, is a simple and convenient way to keep tabs on whether the system is working properly or if something is going wrong.

Road Master Even Brake transmitter

The transmitter in the toad connects directly to your car's brake light switch, so it's not just checking that the system is activating, but that the toad is actually braking. If the Even Brake does shift during travel, it could apply the brakes continuously or not at all. This could happen with any portable system, but with this handy monitor, you'll know right away if something goes wrong.

Road Master Even Brake Monitor

The Even Brake monitor uses LED lights, an LCD text display, and audible alerts to keep you fully informed. The 3 LEDs - green, yellow, and red - are a quick and easy way to see that the Even Brake is functioning and what it is doing. If you need more detail, the LCD display gives you full messages to help you troubleshoot.

The audible alert only sounds in the event of an emergency. This way you'll know right away if, for example, a breakaway has occurred, even if you aren't watching the monitor.

Breakaway System

The Even Brake also comes with a breakaway switch, an absolute must for safe flat towing. If there's ever an emergency situation where your toad becomes detached from the motorhome, the breakaway switch will immediately activate the brakes and bring the vehicle to a stop.

This switch mounts to the front of your toad and plugs into the braking monitor transmitter. It includes a pin that connects to your RV's hitch receiver with a breakaway cable. If the toad and RV become disconnected, the cable will pull the pin out of the switch and trigger the braking system. A reserve air supply in the operating unit will then apply the brakes in the car.

9400 Road Master Even Brake Supplemental Braking System - Proportional

Installation Details RM-9400 Installation instructionsAlternate Instructions RM-9400 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Roadmaster Even Brake Portable Flat Tow Brake System - Proportional - RM-9400

Average Customer Rating:  4.6 out of 5 stars   (45 Customer Reviews)

Portable unit gets you smooth braking without a complex installation. Measures the RV's braking and applies your towed car's brakes with the same intensity, at the same time. Easy to swap between multiple cars. Includes LCD braking monitor.

1996 Ford F-250 and F-350

So I never used mine. This is for those trying to decide if they need one. I tow an F250 with a 43’ tag axle, with an 8.9l Cummings. Yes I can feel the truck back there but I have never had the need for additional braking. Crossing the Snoqualmie pass on I-90 or driving through the cascades, I have no problems slowing with the engine brake. I have a big rig and tow a big truck so if this is your set up I’d give it a shot before committing to such an expensive item that I never use. I’m sure smaller rigs pulling larger trucks will benefit from a device like this.

2022 Jeep Cherokee

Ordering was easy. Delivered very promptly. Actually cheaper then what the manufacturer sells it for. Live near manufacturer and having them install all my flat towing components this month. Great service Etrailer!!



It is working great. Have just used it on a 2700 mile trip. It has been easy to hook up and disconnect. It has given us that feeling of extra security towing our vehicle.

Etrailer Expert

Mike L.


@Robert That's great! We're happy to hear that your Roadmaster # RM-9400 Even Brake is still working well for you...


Very happy I received it, normal great service from etrailer but had a shipping issue, (shipper's fault). I will always go through etrailer first for anything RV related. I will be back!


I ordered a complete towing package from etrailer for my Sprinter RV to tow a Hyundai Accent. The Roadmaster Even Brake was the supplemental braking system that etrailer recommended. The system has worked flawlessly. After the original set-up, it literally takes all but 2 minutes to either put in or take out and stores neatly in the trunk of my Accent when not in use. The instructions for use and adjustment are clear and easy to understand. After a year of use, I couldn't be happier with this system.

John K.


Im happy to say that my towing package from etrailer is as reliable as they day we bought it and it has towed our little car around from coast to coast more times than I care to remember. At this point, I can hook up our car in my sleep! Thanks.


Very easy to install with the supplied directions als o watched video of install on Haven’t used it yet but very pleased with toehold system.

2017 Toyota Tacoma

Very nice piece of equipment. Installation was no problem. The instructions are clear and easy to follow. It fits nicely in 2017 Tacoma. Initial drive showed a noticeable improvement in stopping smoothness without adjusting any of the settings from normal yet.


Great for towing jeep behind the truck


Very fast shipping


Great customer service from William and the team at E Trailer. Kept me updated at all times throughout the process.


etrailer never contacted me because of delay. etrailer forwarded order to supplier. Customer service for etrailer is so bad. It wasn't until I contacted etrailer some 5-6 months later to get refund. This could have been a better experience had etrailer recommended a replacement product. etrailer is now my last choice!
Last person was very rude that I spoke to about this product

2015 Jeep Cherokee

Great product, but when ordering you need to request any updated supplemental technicians bulletins for your specific vehicle (my vehicle = 2015 Jeep Cherokee Trailhawk). Installation using the included product installation instructions exactly (not being told that there were updated technicians bulletins) caused the vehicle battery to run down to the point where I couldn't operate any vehicle electronics or start the vehicle. A call e-Trailer provided updated information. The manufacturer (Roadmaster) was aware of the issue and provided solution instructions. Had this been offered when ordered, I would have avoided having to deal with a dead battery and extra installation time. When installed using the updated information, the product works great.

2012 Fiat 500

Very good product
Easy to install and
to use
Very good service from etrailer



Very good


I have a lot of trouble getting this wo rking

Etrailer Expert

Jenny N.


That is definitely not what we want to hear about this braking system. It is designed to work smoothly. Can you tell me more about your experience with it. I am happy to help.


The system is quickly installed and works extremely well. I had one emergency stop and it reduced the time to stop incredibly.


I've had an Even Brake for over 20 years and love it. The old unit wore out. This new unit was an exact fit and appears to have a few more features.


Installation instructions were complete and helpful. No problem one year later.


Will at e-trailer did a great job of answering very detailed Qs and helping with this order. Arrived quicker than expected. Very happy with the CS at e-trailer as well as this product,.

2012 Chevrolet Equinox

It is pretty easy to attach to the vehicle and remove once you get to your destination. It is pretty light so it doesn't take much to move it.


Great product, great delivery, great service. I wish the RV dealers had as much integrity as etrailer!


Wish I had brought it sooner



Good no complaints works well


It's a little clunky to store when not in use but works as advertised.


I received all my order parts together nothing short able to continue my project.


Easy to use and set up. I'm glad I choose this system. I haven't had any problems with RM-9400, great system

2006 Chevrolet Malibu

It works!! What more can I say


The unit is being installed Tue sday, january 21st. I checked the box, everything seems to be in order and was packed securely. At this point in time extremely happy with the service. The unit was delivered one day earlier than anticipated. Great job.

Show More Reviews

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

  • Can I Monitor The Braking System In The Motorhome When Using The Roadmaster InvisiBrake System?
    Although the Roadmaster InvisiBrake Supplemental Braking System # RM-8700 doesn't have a fancy transmitter/ receiver like the RoadMaster Even Brake System # RM-9430, the InvisiBrake system does have a LED monitor that illuminates when your towed vehicle's brakes have been activated. It lets you know if the brakes have been on for too long with an audible alert. at that point the system will automatically begin to release pressure after 15 seconds of continuous braking. The InvisiBrake system...
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  • Parts Needed to Flat Tow 2002 Jeep Wrangler TJ
    To flat tow your 2002 Jeep Wrangler TJ, I recommend the Roadmaster XL Base Plate Kit - Removable Arms # 1420-1. The arms of this kit can be removed when you are not towing your Jeep to maintain the look of the Jeep. For a tow bar that is compatible with these base plates, I recommend the Roadmaster Falcon Tow Bar # RM-520. This tow bar features a quick-disconnect system to allow you to quick and easily mount and remove the tow bar. The telescoping arms help make hook up easier and will...
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  • Transmitter and Receiver Recommendation for a Roadmaster Even Brake System
    Yes, the RoadMaster Even Brake Transmitter and Receiver # RM-9430 that you referenced would be the correct kit you would need to give you a transmitter and receiver for the used Even Brake System part # RM-9400 that you have. The breakaway system of the system will need to be properly installed before the Even Brake will be functional. If you are missing that you would want part # RM-650898. For a harness you would want part # RM-650900.
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  • What is the Key Position Needed for Flat Towing a 2012 Jeep Liberty Behind a Motor Home
    I checked the owners manual for a 2012 Jeep Liberty (starting on page 424) and it does seem to indicate that you would remove the key. I advise taking a look at the manual because only specific models can be flat towed and there is a specific procedure involved in doing so. The issue that I have is that if the key is removed then the steering would lock and the wheels would scrub on turns.
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  • Roadmaster Even Brake vs. Brake Buddy Select 3 Supplemental Braking Systems
    The Roadmaster Even Brake Portable Supplemental Braking System # RM-9400 and Brake Buddy Select 3 Portable Supplemental Braking System # HM39524 are really good choices for easy-to-use portable braking systems, and have only one difference that I would consider a major factor. That difference is the remote of the Brake Buddy vs. the monitor of the Even Brake that you'll have in your motorhome. While both give you alerts and allow you to monitor the system's status, the Brake Buddy's remote...
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  • Troubleshooting Roadmaster Even Brake Where Braking Light Stays On
    This means that the the Roadmaster Even Brake # RM-9400 is not getting a clear signal between the transmitter and the unit. If you can move the transmitter or main unit closer hopefully that will allow the signal to connect and get rid of the issue. If that does not work you'd need a new transmitter like with the # RM-9420.
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  • Replacement Motorhome Monitor For Roadmaster Even Brake RM-9400
    There is a replacement motorhome monitor for your Roadmaster Even Brake Portable Supplemental Braking System # RM-9400, which is the following part: - RoadMaster Even Brake Motor Home Monitor # RM-9410 If the Jeep still has the ICX transmitter and the full breakaway kit, the only other thing you would be missing is the monitor. But if by "full controller" you meant the unit that depresses the pedal in your Jeep, if you don't have that part you would indeed new an entire new Roadmaster...
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  • Troubleshooting Red Light Staying on With Even Brake Braking System
    If the red light on the Roadmaster Even Brake Portable Supplemental Braking System # RM-9400 remains on and "Even Brake" is staying on the issues is the monitor is not getting a clear signal from the RoadMaster Transmitter for Even Brake Systems # RM-9420. As you can see from the cut out of the instruction manual, you should be able to solve this by either moving the transmitter higher, or moving the monitor in your motorhome.
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    Image 1 for
  • Base Plates, Tow Bar, Wiring, Safety Cables, Braking System to Flat Tow a 2010 Dodge Caliber
    Yes, you can use a tow bar to flat tow your 2010 Dodge Caliber. There are a few items you will need in order to flat tow the vehicle. First, you will need base plates. Base plates provide attachment points required by the tow bar. For your Caliber, you can use Roadmaster EZ Base Plates, # 52281-1. With these tow bars installed you will be able to use the Tracker Tow Bar, # RM-020, that you have referenced, along with the Quick Disconnect Kit, # RM-201 (needed to allow the removable arms...
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  • Flat Towing Wiring Harness and Accessories to Flat Tow 2014 GMC Sierra 1500
    To wire your 2014 GMC Sierra 1500 so it's taillights operate in conjunction with those of the towing vehicle or Motorhome, you'll need a diode system like # RM-15267. The installation isn't too involved, as you can see in the install video I've linked for you. You'll also need a few other items to flat tow your truck. Assuming you have a Roadmaster tow bar, the # RM-3177-1 base plates would work fine for you. You'll also need some safety cables like # RM-643, a supplemental braking system...
    view full answer...
  • Flat Towing Parts Needed for 2018 Honda Fit With Manual Transmission
    I'd be happy to confirm the parts you mentioned for your 2018 Honda Fit in order to flat tow it: - Roadmaster Direct-Connect Base Plate Kit # RM-521571-5 - Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar # RM-676 - Roadmaster Universal Hy-Power Diode Wiring Kit # RM-152 - Roadmaster Battery Charge Line Kit for Towed Vehicles # RM-156-25 This can be used if you do not want to pull fuses and use the Roadmaster FuseMaster Fuse Bypass Switch # RM76512 and # RM76511. If your motorhome...
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  • Will the Roadmaster 9700 Braking System Work With a Roadmaster EvenBrake
    That's weird, the 9700 system should've been installed in the towed vehicle - but no it's not going to work with the EvenBrake. Since you're using the 9700 system you can either use the Second Vehicle Kit for Roadmaster 9700 Flat Tow Brake System # RM-98800 with the Second Motorhome Braking Monitor/Alarm Kit for Roadmaster 9700 and InvisiBrake Systems # RM-98850 to add a second vehicle or you can swap everything with the EvenBrake # RM-9400.
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  • Flat Tow the 2002 4x4 Ford Ranger Edge
    Yes, you should be able to flat tow a 2002 Ford Ranger 4x4 with automatic transmission but as always, we suggest you reference your vehicle specific owners manual to ensure. Sometimes there may be a limitation to the maximum distance you can safely flat-tow. I do think you will be okay with the Ford Ranger 4x4 though, I think in neutral the transfer case will still oil components as needed. Again though, please check your specific vehicle manual against what trim package you have that...
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  • Parts Needed to Flat Tow a 2010 Volkswagen Jetta Sedan Behind a Motor Home
    Blue Ox gives base plates # BX3823 an installation rating of 3. The installation rating is a rough measure of the time required for baseplate or bracket installation by a trained installer. These numbers can be used as rough suggested installation time by a trained installer. The first installation of a particular baseplate, and installation by untrained individuals will likely increase installation time substantially. It is strongly recommended to have them professionally installed....
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  • Towing a 2014 Jeep Cherokee Trailhawk Behind an RV
    The images of the parts you mentioned are there to show you where they would install but they are not included. If you look at the parts list you will notice that they are not included. That is a bit confusing though. The reason they are not included is because there is no way to tell what a given person might need for wiring and if they are even using a supplemental braking system that has a breakaway system, if they are using one at all. Demco base plates # DM9519308 are designed for...
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  • Does The Roadmaster Even Brake Monitor Have A Manual Brake Override Function
    You're correct that the Blue Ox Patriot # BLU37TR monitor has a manual brake activation option but the Roadmaster Even Brake # RM-9400 unfortunately does not.
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  • Are Diodes Needed for a 2018 Ford F-150 Using the Roadmaster EvenBrake
    Rick, yes you are going to need to install the brake lite relay kit with your Roadmaster EvenBrake # RM-9400. The brake lite relay # RM-88400 is included so you should not need to buy another one. Roadmaster states in their instructions that diodes would only be needed if you didn't install the brake lite relay kit, but since you are the diodes are not needed.
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  • Parts Needed to Flat Tow a 1986 Toyota 4Runner Behind a Motor Home
    The Excali-bar tow bar is made by Demco and there are some adapters that will allow you to use other manufacturer base plates, such as Roadmaster, with Demco tow bars. What you will first need are the base plates for your 1986 Toyota 4Runner. You can use base plate set # 1123-1. You will also need adapter # RM-032 to use the Demco Excali-Bar tow bar. Next you will need safety cables such as # RM-643. The coiled design helps keep the cables off of the ground. For lighting, a simple magnetic...
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  • Troubleshooting Roadmaster Even Brake Monitor And Transmitter
    If the LCD display on your # RM-9410 monitor does not report braking activity or system status, and the LCD display reads 'Even Brake', the monitor is not programmed to the ICX transmitter. The transmitter and the motorhome monitor are programmed as a set. If you are installing a new monitor, you will have to follow the setup procedure which should be in the monitor kit. If you are getting the green LED light and an 'Even Brake' text message it means there is not a clear signal from the...
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  • Can 2006 Scion tC Be Flat Towed Behind a Motorhome
    According to the owner's manual, a 2006 Scion tC can be flat towed if it has a manual transmission. You'll want to tow with the transmission in neutral and the steering column unlocked with the ignition turned to the 'ACC' position. To flat tow your Scion, you'll need a tow bar like the Roadmaster Falcon All Terrain part # RM-522 , base plates like # 1176-1, safety cables like RM-643, a wiring harness like # RM-15267. You'll also need a supplemental braking system like the Roadmaster...
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  • Parts Needed to Safely Flat Tow a 2010 Chevrolet Silverado 1500
    You will need to check your owners manual or with the Chevrolet dealer to see if your 2010 Chevrolet Silverado 4x4 can be flat towed. Some vehicles must be equipped with a transmission lube pump, an axle disconnect, drive line disconnect or free-wheeling hubs before they can be towed. If the correct procedure is not followed it will cause severe damage to the transmission. If you will be able to flat tow your vehicle, you will need a tow bar, base plate kit, safety cables, wiring, and...
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  • Is Brake Light Relay Required on 2015 Chevy Equinox When Flat Towing with Roadmaster EvenBrake
    There are a series of questions that have to be answered to know if your vehicle will need the brake light relay part # RM-88400. The first question we know the answer is yes since you are using the Roadmaster Even Brake part # RM-9400. Are you using a supplemental braking system that depresses the brake pedal in your towed car? No - You do not need a brake light relay. Yes - You may need a brake light relay. Continue on to the next question. Do the brake lights on your towed car illuminate...
    view full answer...
  • Troubleshooting Roadmaster Even Brake that Loses Air Pressure After Test
    Typically this issue with the Even Brake # RM-9400 is a bad exhaust valve so you'd need to replace yours with the part # RM-450601-50.
    view full answer...
  • Installing Roadmaster Even Brake Portable Supplemental Braking System On 2015 Jeep Wrangler Sahara
    When installing the Even Brake, part # RM-9400 on your 2015 Wrangler Sahara, you are required to use the 12V outlet kit, part # RM-9332. If you look at page 6 of the installation instructions for the Even Brake system you will see how the # RM-9332 is used. The part # RM-9332, is designed to be wired directly to a battery and then has a 5 foot range of wire. Basically, as long as its run to a battery you can run it anywhere in a 5 foot range of that battery.
    view full answer...

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