Just brought home my '01 Disco II, and am starting to work through all the little issues to get it into shape. So far driver's side mirror replacement went well, as did the rear door wiper arm. Filled the washer reservoir with fluid and pushed the button for the rear and no action! I can hear the pump humm, and a little dribble came out, but no wiper arm motion! Same in the front, wipers work perfectly, but no fluid coming out! Any suggestions? The manual says the reservoir and pumps etc are behind the front bumper? Anyone run into this?