Screen washers

[Kerrgo86]

hi all
I have a 2008 c class when I turn on my washer jets the water trickles out can any one help is it the pump r the pipes it's really bugging me don't know were to start looking
I can hear the pump when I press the stalk but the water just trickles out

 

[whitenemesis]

Try cleaning the nozzles, they could be partially blocked, or check the supply tubing hasn't been pinched somewhere. are all the connections leak-free?