If neither one is spraying or even dribbling, I'd check the bottle and be sure it has fluid in it. People have been known to disconnect the level sensor.
If there is fluid in the bottle, then I'd disconnect the hose from the pump and have someone try to use the washers while you watch, but not from directly above it. If you get a good spray, then you know it's most likely clogged nozzles.
If you don't get a spray from there and you can't hear the pump motor coming on, then use a VOM, disconnect the plug and check for voltage at the connector when your helper tries to use the washer again. If you have voltage, then it's time for a new pump. If not, you need to check the fuses and wiring.