Where is the fuse for interior lights and automatic door lock on a 2003 ford windstar lx?

The fuse for the interior lights and power door locks in a 2003 Ford Windstar LX is not located in a single fuse. These circuits are likely protected by multiple fuses, and possibly even a relay.

To find the correct fuses, you need to consult your owner's manual. The manual will have a fuse box diagram showing which fuse(s) control which circuits. The fuse box is usually located under the hood and/or inside the vehicle, often under the dashboard.

Without your owner's manual, it's impossible to give you the exact location. Searching online for "2003 Ford Windstar LX fuse box diagram" might yield a diagram, but be aware that diagrams vary slightly depending on options and trim level. Always double-check against your vehicle's specific manual.