There are two pumps underneath the reservoir in the engine compartment, one each for the front and rear washers. The hoses attach to the pumps.
Automotive window washer systems are self priming. Assuming the reservoir is full, you may have a bad pump, cracked/pinched hoses or plugged nozzles.
vacuum hose from window washer to where it runs from small hoses running under the window
Under the hood, Drivers side strut tower just behind the washer fluid resevoir....should be 2 hoses going to it...1 in 1 out...
If you can hear the washer motor running when try to clean you windshield then it only needs the hoses to be blow out with a air compressor. If motor does not run it may be a fuse or you need a new motor.
I was under the impression that the first Forester was a 1998 model. Regardless, Subaru uses the same reservoir for both front and rear. Look at the bottom of your windshield washer reservoir and you will see two pumps and two hoses. Rear hose runs along inside the roof to the back of the car. --Ken
Follow the hoses from the washer outlet spray heads backward to the washer reservoir.
possibly your hoses. Washer fluid will deteriorate your hoses. Check into that.
The nozzles or the hoses may be clogged.
Front of transmission, just below where the cooler hoses attach.Front of transmission, just below where the cooler hoses attach.
Follow the hoses from the washer outlet spray heads backward to the washer reservoir.
If the windshield water pump is not working either the fuse is blown, pump has failed and needs replacing, problem with the wiring to the pump, washer fluid level is too low, washer hoses are disconnected or crimped, or the orifices near the windshield are clogged.
follow the windshield washer fluid hoses back to the pump