1993 Toyota Corolla Windshield Wiper Reservoir Won't Spray

Have a 93 Toyota Corolla automatic, 170,000 miles, is in such excellent condition that it looks brand new. Have treated it like a baby since day I bought it brand new.

Suddenly the water from the windshield reservoir won't pump up and spray out on my windshield -- and when I do engage the wiper arm to spray water, there is no sound from the water pump motor like there used to be.

Could it be a fuse, or is the pump probably dead? AND, is it expenisve to replace?

Thanks!