Understanding and Addressing Brake Failure Indicators

The brake failure indicator is a critical safety feature in vehicles, designed to alert the driver to potential issues with the braking system. This article explores the main uses and benefits of a brake failure indicator and provides guidance on how to address the different reasons why this light may come on.

The Primary Uses and Benefits of a Brake Failure Indicator

The primary purpose of a brake failure indicator is to alert the driver when there is a malfunction in the braking system such as low brake fluid levels, worn brake pads, or other system failures. This helps prevent accidents caused by brake failure. The indicator promotes proactive maintenance and encourages timely repairs, which can prolong the life of the braking system and ensure optimal performance.

In addition, the brake failure indicator keeps the driver informed about the condition of the vehicle's braking system, promoting responsible driving practices and awareness of vehicle health. Modern vehicles often integrate the brake failure indicator as part of an integrated vehicle monitoring system that provides real-time data on various systems, enhancing the overall safety and reliability of the vehicle.

Common Reasons Why the Brake Failure Indicator Light Could Be On

The brake failure indicator light can be triggered for various reasons, including:

Low fluid level caused by a leak Low fluid level caused by the pads needing to be changed Something wrong with the ABS (Anti-lock Braking System) A brake light is out Parking brake not being fully disengaged

Brake Warning Lights: ABS and Standard Brake Light

Two different brake warning lights are common in modern vehicles. Understanding the differences between these lights can help in diagnosing issues more effectively.

ABS Warning Light

The ABS warning light indicates a fault in the Anti-lock Braking System. This issue should be taken to a mechanic as most shade tree mechanics do not have the necessary tools, such as bidirectional scan tools, to service this system properly.

Standard Brake Light

The standard brake light can have different meanings depending on the vehicle. Most faults can be addressed by shade tree mechanics, though not all. Here are some steps to diagnose and address potential issues with the standard brake light:

Diagnosing the Standard Brake Light

Check Brake Fluid Level: This is the most common reason for the light to come on. The system may just be low, especially if the brakes haven't been serviced recently and the pads are worn down needing replacement or soon to need replacement. Check Parking/Emergency Brake Position and Switch Function: Applied parking brake will turn the light on. A failed switch that thinks the brake is applied will also turn the light on. Check Brake Lights: Back the car up to a wall, garage door, or something similar and apply the brakes. Note the reflection or glow of the brake lights turning on and off from both sides. If one or both sides are not functioning, check the bulbs. If the bulbs are good, check the brake light fuse. Many vehicles share fuses and/or feed from multiple fuses, so check the brake/hazards/turn signal fuses all at once. Check the Brake Switch: If you haven't found the issue yet, check for power and function at the brake switch, usually attached to the brake pedal under the dash. If you have power and function at the brake switch, turn on the hazards and verify function at all four corners and the function of the left and right turn signals. Most vehicles tie the turn signals, brake lights, and hazards together at the "multi-function."

By following these steps, you can likely resolve the issue yourself. However, if you've exhausted all possibilities and cannot determine the cause of the brake failure indicator light, it may be time to take your vehicle to a professional mechanic.