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)
Measurement:
Disconnect the large multi-pin connector (X2) from the PCB.
Measure the continuity between pin 7 (grey wire) and pin 20 (grey wire) at the large multi-pin connector (X2) on the PCB (as shown in the photograph).
Measure the continuity between pin 7 (grey wire) and pin 20 (grey wire) at the large multi-pin connector (X2) on the PCB (as shown in the photograph).
Isolate as per TOPs P4
and refit as necessary