Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect fan connector from fan
Measurement:
Measure for continuity (zero resistance) on each wire of the fan harness.
Yellow to Yellow (13.1 on X3).
Orange to Orange (13.2 on X3).
White to White (13.3 on X3).
Brown to Brown (13.4 on X3).
Blue to Blue (13.5 on X4).
Note:
Appearance of plug at fan may differ.
If connector is not exposed at the side (as shown)
use the bottom of the connector instead.
Yellow to Yellow (13.1 on X3).
Orange to Orange (13.2 on X3).
White to White (13.3 on X3).
Brown to Brown (13.4 on X3).
Blue to Blue (13.5 on X4).
Note:
Appearance of plug at fan may differ.
If connector is not exposed at the side (as shown)
use the bottom of the connector instead.
Isolate as per TOPs P4
and refit as necessary