Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Disconnect plug CN8 from the Main PCB
Disconnect the top plug from the Ignition PCB
Ensure appliance is cool

Measurement:

Test 1:
Test for continuity between the blue wire from the ignition PCB and the lower blue wire on CN8.
Test 2:
Test for continuity between the brown wire from the ignition PCB and the BLACK wire on CN8.