Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect the harness from fan
Measurement:
Test 1:
Check resistance across fan pin 1 and pin 5
(the two outside pins on the fan).
Expected resistance between 110 and 130 Ohms.
Test 2:
Measure the resistance between one of the outer pins and a suitable earth.
Expect a resistance of 1 MOhm or greater.
Check resistance across fan pin 1 and pin 5
(the two outside pins on the fan).
Expected resistance between 110 and 130 Ohms.
Test 2:
Measure the resistance between one of the outer pins and a suitable earth.
Expect a resistance of 1 MOhm or greater.
Isolate as per TOPs P4
and refit as necessary