Set Appliance State:

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

Measurement:

Measure the resistance between terminals 2 and 3 on the spark generator.
Expect approximately 170 - 640 Ohms.
Is the resistance as expected?
Note:
The spark generator may be a different colour but the test remains the same.