Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Disconnect plug X8 from PCB
All links from previous tests still fitted

Measurement:

Measure resistance across pin 2 (black / yellow) and pin 3 (violet) on connector X8.
Resistance should be short circuit (zero resistance).
Note:
Wires may be multicoloured.