Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector X3 from the PCB
Measurement:
Check for continuity (zero resistance) between the black wire (pin 9) at X3 to the furthest black wire the mains terminal block (refer to picture).
Expect continuity / zero resistance.
Also visually inspect the condition of the harness.
Is the resistance as expected and is the harness in good condition?
Expect continuity / zero resistance.
Also visually inspect the condition of the harness.
Is the resistance as expected and is the harness in good condition?
Isolate as per TOPs P4
and refit as necessary