Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove pump cover
Remove wires from pump terminals

Measurement:

Test 1:
Measure the resistance between the live and neutral connections to the pump assembly.
Expect a resistance of approximately 225 ohms.
Test 2:
Measure between one of the pump connections to a suitable earth.
Expect a resistance of 1Mohm or greater.
Are the resistances measured as expected?