The first thing I would do is check your fuses and insure you have juice to the window wiring. Then I would get my multi-meter out and trace backwards from the switch (to start with) and determine where the hot wire trail ends. It's probably a ground, connection, or the switch. Only way to determine which is to test with a meter. Good Luck!
Ken & Jeannie
96 Vectra Grand Tour 35' DP
Jacey (terri-poo, waiting at the rainbow bridge), Jack (silky terrier)