Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove bottom facia panel
Disconnect connector X3 from the PCB marked PUMP

Measurement:

Test 1:
Measure the resistance between the blue and brown wires on X3.
Resistance should be approximately 180 Ohms.
Test 2:
Measure the resistance between the
brown wire on X3 to a suitable earth point.
Resistance should be greater than 1M Ohm.