Above the brake pedal,its black plastic.
Switch is defective or out of adjustment.
Remove the high mount brake light retaining screws from your Mazda Protg. Remove the high mount brake light wiring harness. Reverse the process to install your new high-mount brake light.
To replace the third brake light on a 2002 Mazda Protege, first, open the trunk and locate the plastic cover for the brake light assembly. Remove the screws or clips securing the cover, then gently pull it off. Disconnect the old light bulb by twisting it counterclockwise, replace it with a new bulb, and reassemble the cover by securing it back in place. Test the brake light to ensure it's functioning properly.
reset it.
Typically the light will remain on if the fluid is low, or maybe the ebrake just pulled just enough that it is on..... or the switch that is triggered by the handle is faulty
How do I adjust a stoplight switch on my mazda 626 LX V6
You have to go inside the trunk and remove the circular plastic covers from behind the lights. Then you have to unscrew the entire light and you can access the bulbs to replace them.
To change a brake light you need to open the trunk and remove the cover behind the light. Pop out any clips using a screwdriver or needlenose. Using a 10mm deep socket, pull off the three nuts holding the light on. Once you pull the light off you can twist out each light by turning counterclockwise about 1/4 turn.
Probably a brake light switch problem. May be able to adjust, or may need to replace. I just replaced the brake light switch in my 1998 Mazda Protege LX and the problem came back. I believe the cruise control could be shorting out the brake light switch.
Fuse panel.
From inside the trunk.