Hi Louise
check your jet nosle fuse 10A
" washer management fuse 15A
If they are ok check you nosles are not choked by clearing with a pin.
If this is not the case the next step is to see if there is power going to your relay from your window wiper switch control, If there is power going from your window wiper control to the switch and the pump is not sounding the problem lies in the washer pump, To find out if it is your window wiper switch control is faulty or the relay you will need a second person to listen to the relay as you press the washer control if the message is being sent from the switch to relay you will hear a clicking noise that means the relay is functional if not the problem lies between the switch and relay.
Some times the pump can be removed from the car and washed out to remove debrie and refitted and may function normally once again if not a new washer pump will have to be accquired.
STUART ALEXANDER DUFF, January 2011