On my 94 Sentra the washer fluid is not spraying when I switch it on. The wipers seem to be working fine though. When I hit the switch, there is no motor sound at all, but the wipers just move through the cycle with no fluid coming out. I checked to make sure the tubes were free of debris and they seem fine. Any ideas on what I would check first? Would it still be a wiper motor problem, even though the wipers move fine through the cycle or would it most likely be a switch problem at the steering columm area? Any ideas would be great, thanks!