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
Remove connector X2 from the PCB

Measurement:

Measure the resistance of the outer two brown and blue wires on connector X2 to the corresponding pins inside the spark generator connector as shown.
Expect continuity / zero resistance on both of the wires in the harness.
Also visually inspect the condition of the harness.
Is the resistance as expected and is the harness in good condition?