To find the correct fuse(s), you must consult your Windstar's owner's manual. The manual will have a fuse diagram showing the fuse ratings and what circuits they protect. Look for fuses labelled something like:
* Turn Signals: This is the most direct label, but it might not always be present.
* Flashers: This refers to the electronic component that makes the lights blink.
* Parking Lamps: Sometimes the turn signals share fuses with the parking lamps.
* Headlights: A blown headlight fuse could prevent turn signals from working.
Without knowing your Windstar's year, it's impossible to give a specific fuse number. Checking your owner's manual is the only reliable way to find the correct information.