Hi there ..

We are wanting to replace a faulty defrost-timer with a unit salvaged from another fridge .

However the two units are set up differently (wire colors etc ), so we have the dreaded uncertainty factor .

Both units have 4 terminals ..

original is numbered
1-2-3-4

replacement timer
2-3-4-1

Q1.
Are the numbers universal ?
i.e do we simply number-match the wires to the terminals ?

Q.2
The replacement unit has a green wire attached to the metal body of the timer motor . The original defrost timer doesn't have this wire .
Is this what i see referred to online as a "flying lead wire"?
What is its function ?

Cheers ..