Read this thread before you buy a bunch of parts.
http://www.peachparts.com/shopforum/showthread.php?t=233235&highlight=window+motor
Dirty switchs and broken wires are very common on these cars. Think of how old your car is and how many times the wires from the door to the in side of the car have been bent back and forth over the years and how much dirt could be in the switch in that time.