the pump is wired in series with the water metering circuit,
sounds like the circuit is open and will most like illuminate the empty water LED.
Locate the micro switch on the float assembly and meter for power if you have power to the switch then either the switch is fauly or the wiring for the pump is compromised,
use the meter and check the wirings continuity,
if you have no power at the micro switch then trace the wire upto the connection on the pcb and check for voltage + wiring continuity,.
If the pcb isn't outing the voltage,
then its bad news I am afraid
paul, March 2012