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 connector CN1 from the PCB
Disconnect connector CN1 from the PCB
Measurement:
Measure the resistance across the grey wires on connector CN1.
Resistance should be open circuit.
Note: On some PCB's the connector will be labelled as CON3 not CN1 and its orientation will differ, however the test points and expected results remain the same.
Resistance should be open circuit.
Note: On some PCB's the connector will be labelled as CON3 not CN1 and its orientation will differ, however the test points and expected results remain the same.
Isolate as per TOPs P4
and refit as necessary