The brake fluid level may be low in the reservoir. If the reservoir is low it's telling you the brake pads are worn down. As the brake linings wear down the fluid level drops and eventually turns on the brake light. Have a mechanic check your brakes soon. See "Related Questions" below in case the brake light in question is/are the ones in the taillights. Not uncommon for Windstar brake lights to turn themselves on.
check brake lines,make sure there is no leaking
Check your brake fluid level.
See sources and related links below to lookup Ford Windstar brake light lamp part numbers by vehicle year.
brake light bulb out
If the red " BRAKE " light in your dash is on that indicates that either your parking brake / emergency brake is on , or the BRAKE FLUID LEVEL in your brake master cylinder ( located in the engine compartment ) IS LOW
If your brake light is not coming on, you might have blown a fuse. You might also have a bulb that is no longer working.
You most likely do have rear wheel ABS. The system has deteced a malfunction and set a code.
check the brake fluid level. try filling to top. Get it fixed !
Check the front directional bulb
The brake light switch is mounted right at the brake pedal - a pin coming out of the switch actually touches the pedal.Can a bad switch keep a car from going into reverse: no. It CAN keep a vehicle from shifting out of park thoughSee "Related Questions" below for more
its the screw by your paddle
If only the red brake light is coming on, the parking brake is on or the brake fluid is low. If the yellow abs light is also on, the abs computer has detected a malfunction and set a code.