A dashboard warning indicator that illuminates when the vehicle's computer detects a critical issue in the braking system. It typically triggers for low brake fluid, a loss of hydraulic pressure in half the master cylinder, or an engaged parking brake. Ignoring this light can result in complete brake failure.
Heard on the job
The brake light came on as soon as I hit the pedal, so check the master cylinder for leaks.
Do not mix it up with
- ABS: The ABS light indicates a fault in the anti-lock system, while the red brake light warns of a fundamental hydraulic failure or engaged parking brake.
Related terms
Idiot light
A basic dashboard warning indicator replaces proper analog gauges to alert drivers of critical faults.
ABS
The anti-lock braking system prevents wheels from locking up during emergency stops.
Instrumentation
The collection of gauges, dials, and warning lights that display a vehicle's operating status to the driver.