Break lights are always on in my 1998 Ford Taurus wagon?

The break lights won't turn off, it's like I'm constantly pushing the brake when I'm not, the only time they turn off is when the car is off.
I want other drivers to know when I'm actually breaking, how do I fix this?

This is either a short in the wiring (a wire is touching ground that shouldnt be), or more likely, the switch behind the brake pedal is broken.

Replace the conuter valveBreak lights are always on in my 1998 Ford Taurus wagon - 1

Replace the brake light(stoplight)switch attached to the brake pedal.Autozone part #F4843. When this switch goes bad, the brake lights will not function at all, will function continuously(like yours)or the shifter won't come out of park.