wiper washer not spraying!

[72supermike]

I'll admit, I didn't really dig to see if there are any threads on the issue. I put a new pump on the wiper motor about a year ago and have only used it about 3 times. Now it doesn't shoot anything. I can blow through it and it will shoot fluid out, so i know the hoses are connected. Is there a check valve that could have gone bad? I really don't want to have to replace that pump. Too deep in the dash. Any help would be good!

Thanks!