Set Appliance State:

Set Multimeter to Resistance Set meter to measure resistance
Isolate Mains Power to appliance as per TOPs P4
Refit connector J1
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Isolate Mains Power to appliance as per TOPs P4

Remove the fuse and measure the resistance across it.
Has the fuse blown?
Continuity / zero resistance = fuse has not blown
O.L / high resistance = fuse has blown