The car has a built-in diagnostic routine that tests each solenoid separately, tests the pump, the height sensors, etc.. no tools required.
I've posted how to do all that before with details:
http://www.lincolnvscadillac.com/showthread.php?t=53667&highlight=pigtail
If that link doesn't work, search the word "pigtail" and posts by Elessee .. but the link works for me.
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Assuming the suspension was OK when you got the car...
I'm really suspicious that you just got the car and have done work on the suspension and all of a sudden, for no reason, it's acting weird. I recommend you un-do whatever you've done and do it again.
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The window not rolling up is often caused by a broken plastic thing in the window's gearbox.. (happened to me and lots of other people) It can be repaired fairly easily (working on and inside the doors is not exactly "easy"). Instructions can be found by searching this forum..
I recall a click-click-click sound when the window motor turns and attempts to roll the window up.. and the gear was the problem.
If you have no motor running, you might want to disassemble the window switches and clean the contacts.. since the drink holder is above them they do get slimed with Coca Cola, etc.
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[edit}
"...had the car over a year.. window wouldn't roll up for 6 months.. "
I needed to re-read your post a couple times.
well, i guess the window is fixed.. the suspension
was ok ("my favorite car").. but you did swap compressors recently? And something happened overnight? After the compressor was changed?