Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Timer set to ON position
Remove the 2 black wires (labelled "black") from their terminals
Remove the 2 black wires (labelled "black") from their terminals
Measurement:
Measure the resistance between the 2 black wires to the timer.
Expect continuity / zero resistance.
Is the resistance measured as expected?
Expect continuity / zero resistance.
Is the resistance measured as expected?
Isolate as per TOPs P4
and refit as necessary