Fixing a long dead washer system on my newly acquired project 240 wagon, 1986.

Fixed and cleaned reservoir.

Installed new pumps.

Washers worked .... briefly. So I suspect the line is clogged.

disconnected at the rear from check valve, not the problem.

So now I reckon there is some debris in the line somewhere between the engine compartment and the rear of the wagon.

I guess that I have to trace it and replace it or try and unclog it.

My questions are: Are there any other check valves in the system?

Where does the hose run? I see it going thru the firewall, but then where? Is it buried under the car or in the interior under the black plastic pieces at the bottom of the door jamb?

Any suggestions for cleaning short of taking the line out?

thanks