While I'm driving in my Toyota Corolla 1999 (3-door model): My parking brake light randomly turns on and off while the car is moving. It doesn't go on and off rapidly, but usually switches at a random interval of 15 seconds to several minutes at a time. When the car stops: The light no longer toggles.
This started happening all of the sudden in the middle of this summer. It seems like it is slowly getting worse, because the light is now more on than it is off.
The car is in a cold environment far up north in Norway (We are already below 0°C).
The brake feels normal, and was changed 2 years ago. Both the pads and the disks themself. However, the parking brake is very slack and almost non-functional. So could it just be a confused sensor? I don't use my parking brake at all since I always park on flat areas and usually just leave it in first gear.
I don't know much about cars at all, so avoid the terminologies if you can.