Sportrak - Fitting adjustable dampers


I have acquired the adjustable dampers and switch for the Sportrak and wish to fit them, but am unable to make them work.
I have checked the switch and the motors and they work fine, also the plug in the dash meters to earth (so I assume it is a switched earth switch) and the plugs are all there for the motors.
I only wish to fit the front ones at the moment, but when i connect the switch to the plug then plug the motors into the connectors in the front wings nothing happens.
I assume there must be a power source fo rthem, but cannot find it. My tech manual says they are fused with the dash, fual gauge etc on a 7.5amp fuse - which is fine.
I must have missed something - anyone got any ideas?