I have a 97 Voyager and the driver's side power window will go down, but not back up--how can I tell if the problem exists in the motor, switch, wiring, etc? Thanks for any input!

remove you power window switch and backprobe it with a meter. The white wire #6, and the light green wire #8. Check for voltage when you press the switch up or down one way should have post battery voltage on negative battery voltage. or you could use a test light and put one end in the LG wire and the the other in the white wire.. good luck.

Thanks--I'll give that a try. If I get no read on the meter I assume the switch is the problem, right?

yup