Set Appliance State:

Set Multimeter to Resistance Set meter to measure resistance
Isolate Mains Power to appliance as per TOPs P4
Remove connector CN11 from the PCB

Measurement:

Test 1 :
Measure the resistance between pin 1 (brown) and pin 6 (blue) on the connector to the pump.
Expect a resistance of 1 Mohm or greater.
Test 2 :
Measure the resistance between pin 1 (brown) and a suitable earth.
Expect a resistance or 1Mohm or greater.