Set Appliance State:

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

Measurement:

Test 1:
Measure the resistance between pins 2 and 3 at the pump.
Resistance should be approximately 225Ω.
Test 2:
Measure the resistance between pins 1 and 3 at the pump.
Resistance should be greater than 1MΩ (or O.L).