The tailgate window washer on my 1993 Volvo 940 no longer squirts washer fluid.I have checked the rear washer pump and it is functional. I checked the washer fluid reservoir and pump connections and there were no clogs. I also disconnected the rear window squirt nozzle to confirm that it was not a clogged nozzle by running the rear washer pump with an open rear hose... no fluid came out of the hose. Presumably, there must be a clogged line between the pump reservoir and the rear squirt nozzle. What is the best way to determine if/where the line may be clogged? My plan is to take a 12 volt air pump and pump air into the line to see if I can free the line. Has anyone seen this problem before?

Any input will be sincerely appreciated.

Thanks,

OnlyVolvo