I'm still jackin' around with a wiper motor on a 95 Mark (wipers don't park and only work on high) and did some "exploratory surgery" last weekend. There seem to be a lot of noises coming out of the delay module under the dash as I moved the switch through the speeds plus, I discovered that I can move the wipers by hand with a little force. Switch, delay module, or motor???

sounds like a motor may be ,not sure . never done any work with those

Look on eBay they should have a motor $15 to $25. Easy swap especially if I can do it! Just some junk to move out of the way.