Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Internal timer switched to the ON position
Remove connector X1 from the PCB

Measurement:

Measure the resistance between pin 2 (black) on the mains
terminal block to pin 2 (black) at X1 on the PCB
Expect continuity / zero resistance.
Inspect harness and connector for good overall condition.