The first thing I would do is listen to see if you hear the pump motor running when you try. If not, then indeed you need a motor or a fuse may have popped. If you hear the motor then pull the fluid line before it gets to the wipers and see if fluid comes out when you activate the pump. If so, then you may have a line clogged in the wiper arm. If not then the line is clogged before that point.

Most likely though, pump motor is shot or fuse is blown.