Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove pump connector from PCB

Measurement:

Test1:
Measure the resistance between the brown and blue wires at the disconnected connector.
Expect approximately 11.4 kOhms
Test2:
Measure the resistance between the blue and earth.
Expect open circuit.
Test 3:
Measure the resistance between brown and earth.
Expect open circuit.