Ive replaced the regulators on a Maxama, twice.
You just have to get the panel off before you can tell what to do.
About a year ago my drivers side window froze up, and I was like here we
go again. Next day it started working, hasnt happened again since
I read about this when I bought my stang and it's only done it to me once. Take your fist and hit the door speaker HARD. Seriously, all it took was one hit for mine to start working again.
My passenger side window will act up after it rains also on really humid days (which is almost everyday down here). So what I do is push the passenger window button on the driver side control really fast back and forth until it moves or I slam the door hard until the sumbitch works. I have done this about 8 times or more, I thought about replacing the motors but I found out they are $135.00 each and I fig I will keep doing what I have been.
LOL, I went out to the car, opened the drivers side door and slammed the hell out of it. Got back in the car and turned the key on and the window works fine now. Gotta love Fords, haha.