I had the same problem with my 91. The car wasn't used much when I bought it. I squirted WD40 into the switch (used the extension tube that comes with the aerosal can) and put it in the crack between the front of the switch and the console. The window's been working fine for over 2 years now. Did this to the pax switch also (it quit working too), and the power switch for the steerring wheel. Seems the contacts get gunked up sometimes.