Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Gain access to PCB (use Insulation Mat as required)
Disconnect CN102 from the ignition PCB
Disconnect CN102 from the ignition PCB
Measurement:
Test 1:
Measure the resistance between pins 2 and 4 at the disconnected plug.
Resistance should be approximately 780Ω.
Test 2:
Measure the resistance between pin 2 at the disconnected plug to a suitable earth point.
Resistance should be greater than 1MΩ (or O.L).
Measure the resistance between pins 2 and 4 at the disconnected plug.
Resistance should be approximately 780Ω.
Test 2:
Measure the resistance between pin 2 at the disconnected plug to a suitable earth point.
Resistance should be greater than 1MΩ (or O.L).
Isolate as per TOPs P4
and refit as necessary