Low brake fluid and the parking brake being on are the two most common causes.
It is probably the brake lights that are on due to a misinstalled or damaged brake light switch.
my brake light stay on but emergency brake is unhooked
The brake light switch is broken or out of adjustment.
check for a bad or misadjusted stop light switch at the upper end of the brake pedal under dash area
STICKING BRAKE LIGHT SWITCH AT THE TOP OF THE BRAKE BEDAL
Bent brake light switch bracket above the brake pedal.
Probably a brake light switch.
Could be,E-Brake slightly applied, Sticky E-Brake cables, E-Brake out of adjustment, Brake fluid reservoir low, Brake system in need of maintenance,
The parking brake light stay lit on the 1999 Mitsubishi Montero sport the parking brake is working and you have not put the light off.
It is important to know what the meanings of the emergency lights on a ca. A brake light would stay on in a car because the brake system needed to be fixed, and the light needed to be reset.
check the brake light switch
Have you checked your brake fluid?
Brake lights? Check brake light switch for adjustment or replacement
The brake indicator light is for the EMERGENCY break, release this break.
The brake light on most vehicles is not only an indicator that the parking brake is on, but that there is a problem with the system.
You could be low on brake fluid.
Stuck brake light switch, or a short to power somewhere in the brake light circuit.
Brake light switch out of adjustment or defective
The brake light switch is either defective or out of adjustment if applicable.
You're probably low on brake fluid.
there is a major problem in the brake system if both lights stay on. have it checked before you have no brakes at all
Check the brake fluid level in your brake master cylinder in the engine compartment ( the brake light also comes on if the parking / emergency brake is applied )
Brake light switch either out of adjustment or defective Should be located at upper end of brake pedal under dash