Top 5 Invisibrake Problems : Quick Solution

We all familiar with roadmaster invisibrake. InvisiBrake is a fantastic product that is easy to install. It can help prevent dangerous situations and increase your fleet’s safety by protecting your drivers, fellow road users, and pedestrians.

But sometimes we face some invisibrake problems like the brake controller not working with pedal or other.So, how to deal with unsolvable problems? No worries, here you will find a solution.

This manual will describe the most common issues with Invisibrake and how to fix them quickly.

Top 5 Invisibrake Problems

The brake pedal clip is installed too high.

If the brake pedal clip is installed too high, it can cause very little or no braking. To resolve this issue, ensure that the brake pedal clip is mounted at the same height as the brake pedal of your towed car.

This will ensure the optimal operation of your InvisiBrake system and give you confidence when driving in slippery conditions.

How do you fix it?

It could be a simple misalignment if you’re experiencing any of the abovementioned issues.

To fix this, check that all components are aligned and working correctly.

For example:

  • Check the cable and pulley alignment.
  • Check the brake pedal clip.
  • It’s important to double-check the brake pedal’s height, angle, and placement.
  • Always install the pedal clamp as low as possible for the best performance.

A magnetic light, a light bar, or a bulb and socket are on the towed car

If you have a magnetic light, a light bar, or a bulb and socket on your towed car, this is causing the brake light to flash.

The brake light is not flashing because of a blown fuse or a bad bulb. If you have one of these lighting systems installed on your towed car, the problem may be related to it.

Invisibrake will not work if the brake lights constantly flash. At the same time, Invisibrake is engaged in reverse while your vehicle moves forward at average speeds (not travelling in reverse). An issue can cause this with the lighting systems installed in both cars involved with Invisibrake.

How do you fix it?

If you are experiencing a problem with your Invisibrake system, you may want to try some of the following steps:

  • Connect the towed vehicle’s lighting system to the ground. If there is no connection between both cars, the lights will not illuminate when braking and can cause problems for drivers behind you.
  • The towing vehicle and the lighting system must share the same space. If they do not, it could make it difficult for drivers behind you to see where your wheels are pointing so they can safely pass by them on the road or highway.

The cable has too many turns or turns with a radius larger than 3

If your Invisibrake cable has too many turns or turns with a radius larger than 3″, this can cause the system to over-tighten. Too many bends and turns that are too tight reduce the pulling force, which is crucial for getting your car into the park or neutral.

The cable length is also essential here. If the distance between each turn of the cable is too short, you will have reduced axial stiffness (lower resistance), which can cause it to snap under tension from being pulled by hand or during an emergency stop.

How do you fix it?

  • If your in-wall brake isn’t working, you’ll need to check that the cable has enough turns and turns with a radius smaller than 3″ (yes, this is a real thing).
  • In case it doesn’t operate, you can try moving the cable.

The cable is separate from the pulley’s center.

This common problem can occur if you have a long tow vehicle or your pulley has been damaged during installation.

If you have this issue, your towed car’s brakes will likely not release after InvisiBrake is engaged, as the cable veers in one direction or the other as you look directly down at the pulley.

How do you fix it?

Verifying the pulley’s placement is crucial. If you find it needs to be in the correct position, you must re-position it or replace it with a new one. You can adjust the cable or move it out of its way if you find that they are causing friction in your brakes.

The cable has insufficient free play

If you can’t see the ball at the end of your cable, it may be because there needs to be more slack in it. This can cause sluggishness with your brakes, and if you’re using an Invisibrake, your monitor light will also be on. You’ll have to adjust or replace your cables to fix this issue.

How do you fix it?

The brake cable needs to be unhooked from the pulley first. Then, with a hex wrench, adjust the cable to parallel your hub brake’s centerline. Next, modify your brake cable so there is ¼ inch free play per side. It should allow you to remove and install your wheel without any issues easily!

How does InvisiBrake work?

When you apply the brakes to your motorhome, InvisiBrake automatically applies the brakes to the towed vehicle by tapping into the wiring already in place in the electrical harness of the towed vehicle.

It works with any vehicle, including cars, SUVs, trucks, and RVs. InvisiBrake uses a magnetic brake between your motorhome’s brake pedal and the towed vehicle’s electric brakes.

How long does it take to install InvisiBrake?

InvisiBrake installation takes approximately 3-5 hours, depending on the length of your driveway, the size of your vehicle, and the amount of concrete you have to remove.

Does InvisiBrake work with air brakes?

No, InvisiBrake will not work with air brakes. You will need to use a cable brake to stop your vehicle with it.

How does the InvisiBrake system work?

InvisiBrake is a safety device that helps you stop your car without using the brakes. It works by attaching a sensor to your car’s brake line. Your vehicle will come to a quick stop as soon as the brake pedal is pressed because of pressure sensing technology.


InvisiBrake is the easiest and most convenient way to tow a car. It doesn’t require any cutting or drilling, and it can be set up in under 60 minutes. InvisiBrake is designed for all trailers, including cargo trailers, utility trailers, and dump trucks.

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