Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Disconnect fan connector at fan

Measurement:

Measure resistance across the fan terminals.
Note.
Black test probe connected to terminal 4 for all tests.
Expected resistances as below.
TerminalsResistance in Mega Ohms
4 - 1Greater than 1 MOhms
4 - 2Greater than 1 MOhms
4 - 3Greater than 1 MOhms
4 - 5Greater than 1 MOhms