How to fix a Windstar that is stuck in park - shift lever will not release?

This is most likely to be caused by a problem with the brake switch mounted to the brake pedal.

Easy thing to check and replace - easy in that it's accessible and only 1 or 2 small mounting bolts.

Check to see if your brake lights are working,if you have no current for brake lights you will have no current to shifter release solenoid.Could be just a blown fuse,if that's not it there could be a problem with wiring or the release solenoid itself.

Start by checking your brake lights to see if they work. If they don't work, call the dealer and see if your vehicle has a recall for the brake light switch showing up on their OASIS( Ford term for Online Automotive Service Information System). If there is a recall, guess what? You get a free tow and fix at your friendly local Ford dealer! Whether or not there is a recall, it doe's sound like you need a brake light switch and connector pigtail replacement.

Make sure brake lights are working--if fuse blown or bad switch interock will not release

First, make sure you're pressing the brake firmly when you try to push the shift button. If that's not working, check the brake pedal switch and the relay under the shift assembly.