fuses are blown, or bulbs are blown
Fuse, wiring, bulbs
the parking brake may be stuck and that causes the brakes to lock up completely, and the horn and lights will stick work if the parking brake is stuck.
its gotta be a ford a problem with the center brake light circuit causes the lights to go out i believe it is a diode
Bulbs, wiring, fuse, brake light switch.
possably the switch at the brake? do your brake lights work??
Check the switch
either dimmer switch or blown fuse If you are saying that the tail brake lights are working but the third brake light is not....It may be a defective turn signal switch in the steering column.
Often this type of behavior is caused by a bad ground for the lighting circuit. Check the ground circuit for the brake lights.
my back brake lights don't work, but the brake light on the back door does what could be wrong
If the bulb will not work the fuses under the dash should be checked. When these fuse fail the brake lights will not turn on.
blowen fuse or lights check fuse first
check fuses then check all the bulbs, then check the turn signal switch the brake lights work through it