Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove electrical connectors X20 from the PCB and to the fan assembly
Measurement:
Measure for resistance across each wire of the fan harness,
pins 3,4,16,17 of X20 to the corresponding wire on the fan connector.
(e.g. yellow lead X20 connector to yellow lead fan connector)
Expect continuity / zero resistance on each wire.
Note.
Ensure a good connection is made as misdiagnosis may occur, if required X20 can be left connected to the PCB to ease testing.
pins 3,4,16,17 of X20 to the corresponding wire on the fan connector.
(e.g. yellow lead X20 connector to yellow lead fan connector)
Expect continuity / zero resistance on each wire.
Note.
Ensure a good connection is made as misdiagnosis may occur, if required X20 can be left connected to the PCB to ease testing.
Isolate as per TOPs P4
and refit as necessary