brake switch located on the top of the brake pedal
how to reset the airsuspension on the 2004 Lincoln navigator
Not using premium fuel caused that in my 2004 Navigator.
fuse, bulbs
brake light switch would be most common cause
The lights wiring is grounded and you might want to check to see if the ground is connected properly to the frame.
BAD BRAKE LIGHT SWITCH AT TOP OF BRAKE PEDAL
The BOO (Brake On/Off) Switch may need to be replaced. If it is bad, it would cause the brake lights to NOT illuminate when the brake pedal is applied.
Possible ground issue at the taillights.
Blown fuse or defective brake light switch.
It could be one of your vaccum lines that collapsed
Most likely a fuse.
The most probable cause is that the brake light switch is out of adjustment.