Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove the fan connector
Remove the 6 way connector from the PCB
Remove the 6 way connector from the PCB
Observation:
Measure the resistance across the fan harnesses low voltage wires (brown, green and white) between the fan and PCB connectors.
Expect continuity / zero resistance on each of the wires in the fan harness.
Also visually inspect the condition of the harness.
Are the harness checks satisfactory?
Expect continuity / zero resistance on each of the wires in the fan harness.
Also visually inspect the condition of the harness.
Are the harness checks satisfactory?
Isolate as per TOPs P4
and refit as necessary