Set Appliance State:

Set Multimeter to Resistance Set meter to measure resistance
Isolate Mains Power to appliance as per TOPs P4
Remove the transformer from the control box

Measurement:

Test 1:
Measure the resistance across the top two pairs of adjacent pins.
Expected resistance approx. 100 ohms.
Test 2:
Measure the resistance across the bottom two pairs of adjacent pins.
Expected resistance approx. 2 ohms.
Note:
Allowances should be made in resistance
readings if fused leads are being used.