Your Windstar is subject to a Ford recall for the cause of this problem.
The cause is a leaking brake pressure sensor screwed into the bottom of the master cylinder.
I would suggest contacting your Ford dealer confirm your van is covered (I believe every single Windstar is part of the recall), and arrange for the quick and easy repair.
See "Related Questions" below for more
Records mileage and speed of the vehicle
The mileage indicator in a vehicle is called an odometer.
Read it from the odometer - a total mileage recorder usually on the speedometer dial.
The certified accurate mileage of the vehicle, or a statement that the odometer is non-functional and the exact mileage of the vehicle is unknown.
Relates to the Odometer Codes on the Arizona Department of Transportation Vehicle Division, Title Registration Application. It is a section of Checked Boxes A The Mileage stated reflects the actual mileage B The Mileage stated is in excess of the odometer's mechanical limits C The odometer reading is not the actual mileage. WARNING - ODOMETER DISCREPANCY
home many miles your car has driven.the mileage of the vehicle
Odometer, records mileage accrued on vehicle
Relates to the Odometer Codes on the Arizona Department of Transportation Vehicle Division, Title Registration Application. It is a section of Checked Boxes A The Mileage stated reflects the actual mileage B The Mileage stated is in excess of the odometer's mechanical limits C The odometer reading is not the actual mileage. WARNING - ODOMETER DISCREPANCY
Definition of Exceeds Mechanical Limits :A vehicle with a 5-digit odometer cannot accurately track mileage after 99,999 miles because the odometer rolls over. This title is the result of a seller certifying under the Truth-in-Mileage Act, that the odometer reading EXCEEDS MECHANICAL LIMITS of the odometer.
How far a vehicle has gone since it was new. The difference between two readings of the odometer of a vehicle. Mileage (or gas mileage) also refers to a vehicle's fuel economy, specifically the number of miles it can travel on one gallon of fuel.
Exempt from disclosure on an odometer reading typically means that the mileage information is not available or required to be disclosed for a particular vehicle due to its age, type, or other specific exemption criteria. This could be because the vehicle is over a certain age, a model year exempt from federal odometer disclosure regulations, or a type of vehicle not subject to mileage reporting requirements.
The -E-ngine -C-ontrol -M-odule, or ECM recorded the vehicle mileage along with the odometer. The EMC mileage can be read by a scan tool at most dealerships or repair shops with the proper equipment. It is possible for the two mileages to differ slightly, but a large variance may indicate a faulty odometer, or possibly odometer tampering.