Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Gain access to PCB (use Insulation Mat as required)
Disconnect CN10 at PCB

Measurement:

Check resistances are approximately as per the table:
WiresResistance
Red to Blue13kOhms
Red to Pink24kOhms
Red to GreyGreater than 1MOhm
Pink to Blue37kOhms
Pink to GreyGreater than 1MOhm
Blue to GreyGreater than 1MOhm