Set Appliance State:

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

Measurement:

Test 1:
Measure the resistance between the brown and pink wires on the pump connector.
Expect a resistance of between approximately 145 and 250 ohms.
Test 2:
Measure the resistance between the brown wire and a suitable earth.
Expect a resistance of at least 1 MOhm or greater.