Foot pump windshield washer

Well I took the main water feed off the water tank and blew though it and blew the water out of the foot pump to the windshield so it isn't clogged. You would think it would self prime ? I might have to get the compressor out and force the water into the pump from the tank.
I could put a blow hose on the compressor and hold my hand over the top of the tank full of water and see what happens them. :glasses7: