To notify the driver that there is a problem with the brake system.
...I have the exact same problem with my 1993 corolla.......Brake System warning light and discharge warning light
Brake system warning light.....
Yes, a bad ground can cause the brake warning light to illuminate. If there is a poor electrical connection in the grounding system, it can lead to incorrect readings from the brake system sensors or cause electrical faults, triggering the warning light. Additionally, issues with the brake fluid level or the brake system itself can also contribute to the light turning on, so it's important to check all related components.
To clear the dash brake warning light after changing the power brake booster on your 1979 Ford, start by ensuring that the brake fluid level is correct and the brake system is properly bled of air. If the light remains illuminated, you may need to disconnect the vehicle's battery for a few minutes to reset the warning system. Reconnect the battery, and the brake warning light should turn off if everything is functioning correctly. If the light persists, check for any additional issues in the brake system or consult a professional mechanic.
Brake system fault/failure.
It is your abs system (air bag system) warning light or it is your brake pad wear warning light (depends the year of your van).
If it is your emergency brake warning light, the switch that warns you that the brake is applied may be out of adjustment.HOWEVER - if it is your brake system warning light - GET IT LOOKED AT ASAP - The vehicle's on-board computer is sensing that there's something wrong with it.
Because the e brake is hooked into your braking system and that system has a problem.
You have a problem with the brake system. Once you repair the problem the light will reset itself.
Is it the parking brake light or the ABS light? is it red light or amber?
The hand brake warning light switch is typically located near the hand brake lever, either on the lever itself or mounted on the mechanism that engages the brake. When the hand brake is applied, the switch is activated, illuminating the warning light on the dashboard to alert the driver. In some vehicles, it may also be part of the brake system's overall warning system, ensuring that the driver is aware of the hand brake status. Always consult the vehicle’s manual for specific locations and details.
That your emergency brake is on or that you are low on brake fluid or the brake pads are getting thin or some other brake malfunction