hi all,can anyone help with my water pump problem,got a caravan with a whale water system but no connection for aquaroll,so bought one of them,connected it to my pump,50001,but would not pump,sochecked wiring to it,crossed them and blew fuse,so there must be power going to it,so removed it and connected it directly to the battery,still nothing,so took it to my local store,they checked it said it was no good,so bought a new one,got home,thought i would put it direct to battery,connecting 2 and 3 to pos,and 1 to neg,still cant get anything from it,so connected it into system,opened taps,but it will not pump any water,any ideas about how to get it pumping??????????thanks