* Under the hood: Check the main fuse box (usually located near the battery) for a fuse related to the wipers. The exact number and location will vary depending on the specific Windstar trim level and options. Your owner's manual is crucial here. Look for fuses labeled "wiper motor" or something similar.
* Inside the vehicle: There's usually a smaller fuse panel inside the vehicle, often located under the dashboard on the driver's side. Again, consult your owner's manual for the precise location of any relevant fuses for the wipers or the power to the wiper motor.
Without your owner's manual, it's impossible to give you the exact fuse number and location. The manual will have a diagram of both fuse boxes showing the fuse locations and their functions. You can usually find a downloadable version of your owner's manual online through the Ford website by entering your VIN number.