What is the Anti-Lock Pressure Switch?

The anti-lock braking system (ABS) is an important safety component in modern vehicles. It prevents the wheels from locking when the brakes are applied, allowing for improved control over your vehicle when you are slowing down or coming to a stop. When the driver applies the brakes, the hydraulic pressure in the brake lines increases. If the ALPS detects a pressure change that indicates wheel lock-up is imminent, it sends a signal to the ABS module. The module then activates the ABS system to release and reapply the brakes rapidly, which helps prevent the wheels from locking up and skidding.

The anti lock pressure switch is typically located on or near the master cylinder of the brake system, and it is connected to the ABS module with a wiring harness.

ABS Brake Fluid Level Sensor / Switch Replacement

Inside the ABS system, pressurised fluid is pumped into the accumulator, where it sits ready to apply force to the brakes. The anti-lock pressure switch monitors pressure and turns the pump on and off according to how much fluid is needed to fill the accumulator. This ensures that the ABS system runs correctly at all times, keeping the driver and passenger(s) safe in the event that they need to brake quickly.

Learn more about how the anti-lock braking system works


Symptoms of a faulty anti-lock pressure switch:

  • ABS warning light – A faulty ALPS can trigger the ABS warning light to turn on, indicating a problem with the ABS system.
  • Brakes not responding correctly – If the anti lock pressure switch is not functioning correctly, it may cause the ABS system to malfunction, leading to unresponsive brakes, which can be dangerous while driving.
  • Reduced control while braking – When the anti lock pressure switch fails, your ABS system will stop working correctly. This may cause your wheels to lock while braking, reducing the control you have over your vehicle.
  • Wheels locking up – In some cases, a faulty anti lock pressure switch can cause the wheels to lock up during braking, leading to skidding and loss of control.
  • Increased wear of ABS components – When the pressure switch is failing, it may send an inconsistent signal to the ABS pump. This will cause it to operate incorrectly and wear quickly.

What else can cause the ABS light to turn on?


How important is an anti-lock pressure switch replacement?

If the anti-lock pressure switch fails, your ABS system will be unable to function correctly. This can affect the safety of your vehicle by reducing the control you have while braking. For this reason, it is important that you get your vehicle inspected and repaired if the ABS light turns on.

The anti-lock pressure switch is a crucial component of the ABS system that helps prevent wheel lock-up and skidding during braking, especially on slippery or uneven surfaces. If the ALPS is not functioning correctly, it can cause the ABS system to malfunction, which can lead to unresponsive brakes, reduced braking power, increased stopping distance, and even wheel lock-up, all of which can be dangerous and potentially lead to accidents.

Please Note – if your ABS warning light is ON constantly for an anti-lock pressure switch failure, then you will fail a Warrant of Fitness (WOF). You will need to get this correctly diagnosed and replaced before your WOF can be issued.


ABS Pressure Switch Replacement in Hamilton

Is your car in need of a new ABS pressure switch? If so, we can help! At Grimmer Motors, our mechanics are experts in diagnosing and repairing ABS systems. This means that if your ABS pressure switch, pump or sensors fail, we can get them fixed quickly.

An ABS repair will improve the safety of your vehicle and allow for more control over your vehicle while braking. For ABS repairs and services in Hamilton, contact Grimmer Motors today!


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