What happens if the air pressure drops too low in an air brake system?

When the air pressure drops too low in an air brake system, the low air warning light activates as an essential safety feature. This warning system is designed to alert the driver that the air pressure has fallen below a critical threshold, indicating potential brake failure or reduced braking ability. The activation of the low air warning light provides a visual cue that prompts the driver to take immediate corrective action, such as checking the air pressure gauge and finding out the cause of the drop in air pressure.

This warning is crucial because it helps prevent situations where the brakes might become less effective due to insufficient air pressure, which is vital for the proper operation of air brake systems. Immediate awareness allows the driver to respond accordingly before the situation escalates, ensuring the safety of the vehicle and its occupants on the road.

Understanding the function of the low air warning light is key for any CDL driver, as it is a critical safeguard in maintaining control over the vehicle's braking system.