my 88 300e windsheild washer fluid spray unit works poorly, it spray a splat of fluid on the windshield then dies out. the head light washers spray well enough but the windsheild, not. im thinking of swapping the hose from the headlight unit to the windshield pump and vice versa, the both appear the same, and are adjacent to one another on the bottle

has anyone done this? it would demonstrate if its the pump or a blockage in the lines. any advice?