Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Disconnect AC connector (3 wire) from the fan

Measurement:

Measure the resistance (continuity) across the fan harness leads.
Connections are:
CN13 connector pins 64 & 68 to corresponding connection on fan connector.
Expected resistance is continuity (zero resistance).