i have a 2004 dodge caravan when i press windscreen washer just the wipers go on
no water comes out

could it be the pump or there are seperate fuses

Frozen line? Low fluid?

There's no fuse. Power is supplied by the Front Control Module (FCM) via the switch and the Body Control Module (BCM).

The pump is on the bottom of the bottle accessed through the forward part of the passenger side front wheel well liner. Check for power at the connector. If it's there with the switch on and the ground is good, change the pump.

It could be frozen. Did you check the rubber tubes carrying the fluid to the wipers? They sometimes crack and the fluid never gets there.