Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove connector from pump and X1 from the PCB

Measurement:

Test 1. Measure the resistance across pin 5 (Brown) and Earth
(Main terminal block).
Expected resistance greater than 1MOhm (or O.L).
Test 2. Measure the resistance across pin 6 (Blue) and Earth
(Main terminal block).
Expected resistance greater than 1MOhm (or O.L).