What does a yellow warning light on the dashboard indicate?

A yellow warning light on the dashboard indicates low air pressure, which is a critical concern for combination vehicles equipped with air brakes. When the air pressure drops below a certain level, it could mean that the braking system may not function properly, which can jeopardize the safety of the vehicle.

Understanding the functions of dashboard warning lights is essential for maintaining safe driving conditions, especially with large vehicles that rely heavily on air brakes. Monitoring the air pressure is vital, as insufficient pressure can lead to brake failure, making it crucial for drivers to react promptly to such warnings.

While other warning lights, such as those indicating high engine temperature, low oil pressure, or brake system failure, serve important roles as well, they are represented by different colors or have distinct symbols on the dashboard. Recognizing each symbol and its meaning allows drivers to take appropriate actions to ensure their vehicle is safe and operational.