As best I can tell from my wiring diagram, the black wire (contact 1) is the power feed from fuse "d". It looks like fuse "d" should be 16 amp. The blue (contact 4) and green (contact 2) wires go to the motor, one to open and one to close. The diagram also shows a brown ground wire on the switch (contact 3). Do you have a contact 3 on the switch? Did you disconnect the ground somehow?