Before attempting to drain your radiator:
* Consult your owner's manual: This is the best resource for the precise location and instructions for your specific Windstar model year.
* Let the engine cool completely: Hot coolant can cause severe burns.
If you can't find it after checking the bottom of the radiator on the driver's side, referring to your owner's manual or searching online for a diagram of your specific Windstar's cooling system is highly recommended. A visual guide will help you pinpoint it.