Detecting vehicle movement using a washing machine pressure switch. The switch would be triggered by air pressure when the vehicle crosses a hose. Just remember to plug the end of the hose that's not connected to the switch! So there are four applications but there are lots more. It's certainly worth salvaging these very sensitive switches!
It’s always possible somebody somewhere has posted a wiring diagram on a forum in response to a request, but generally I would think the odds of finding one are pretty low. The best thing to search in Google for (if you haven’t already tried) would be the words, wiring diagram, or wiring schematic, followed by the model number of your appliance ( Where to find the proper model number and serial number on a washing machine ). There are some repair manuals being sold but these are very general and not model specific and written by third parties. All the ones I’ve seen are very much out of date although they may well still contain some useful general advice and knowledge.