Normally this is an indication of a defective brake light switch.
Check the bulbs, the fuse then the brake light switch.
Check fuse for brake switch, check switch, or light control module,
Switch should be located at the upper end of parking brake pedal under dash area Light is common with low brake fluid light
on my 98 crown vic you have to push in the head light switch
I am presuming that you mean the parking Brake light It may be a loose wire or your parking brake (pedal and arm)needs to be tightened. You may also have to tighten the switch
Antilock brake system
Remove the wiring harness from the back of your 1997 Ford Crown Victoria hazard lights switch. Remove the hazard light switch retaining screws. Reverse the process to install your new hazard light switch.
On the brake pedal arm.
i am not sure you mean brake lights or tail lights.If brake lights don't work.You have to check out a brake light switch,(it conects to your brake pedal) make sure both wires are conected to the switch.And if tail lights don't work, you have to replace a head light switch.(where you turn your head light on and off)
I'm not a mechanic / technician but if all ( 3 ) brake lights don't work ( assuming you have a 3rd higher mount brake light and all the bulbs and fuses are fine ) then it would be a problem with your brake light switch ( and also I BELIEVE if all the outside brake lights stay on )
If all the fuses are good, then most likely the brake light switch right on the brake pedal inside the car. Check that.