Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove connector from spark generator

Measurement:

Measure the resistance (continuity) across the spark generator harness, pins 2 & 5 of PCB connector X2 to removed spark generator connector.
Expected resistance is continuity (zero resistance) across each wire of the harness.