Dash brake light on Parking brake is off - 2000 Ford Excursion

That light is also tied in with the parking brake,with the key and light on pull up on parking brake pedal to see if light will go off, assuming you have a good brake pedal & not a mushy feel then it's doing it's job telling you have a hydraulic issue in the system.The switch for the parking brake is mounted on the mechanism and a single wire to it,works off a cam with pedal pushed down switch grounds the circuit.

When you release the parking brake (while keeping the handle pulled) reach down or use your foot and pull the parking brake pedal up . If the light goes off, the switch needs adjustment

These are all different circuits. The brake lights are on a 10amp fuse - the headlights are on a 50amp fuse - and the parking and dash lights are on a 20amp fuse.
Do you have power going into the headlight switch and the brake light switch ?

I am assuming you mean the red light on the dash that says "brakes".
That light is powered by the parking brake switch and the pressure switch for the hydraulic brakes. If the parking brake is on, or the brake fluid is low, the light comes on.

In that car the fuse for the rear lights is also the same fuse for the dash lights. They did that so you would know when your tail light were out. Replace the fuse.

the parking brake light is the one on the dash so the switch by the foot pedal for the emergency brake is at fault

Are you sure the brake light (on the dash) is on because of the parking brake ?
Try this. Watch the brake light and at the same time set your parking brake. If the light seems to get slightly brighter then it isn't on due to the parking brake it is on for another reason.
If it does not get brighter then you need to look at the parking brake switch down by the parking brake as it may be grounded out causing the light to be on.
Be sure to check the brake fluid level. If it is low on brake fluid it will turn the light on also.

I

ther is a micro-switch on the park brake linkage and it is either defective or out of adjustment.

you have an abs fault. have your abs system scanned for codes.

your base brakes will continue to function normally

hi check your charging system make sure it is charging [belts not broken] and most important check your brake fliud level if its low the waning light will come on or the parking brake light may be faulty as these lights on the dash should not be on the same circiut excect if there is a short in the grounding circiut on the dash yates210456