Metro L3-61 1.0L (1990)
Radiator Cooling Fan Motor: Description and Operation
Radiator Fan
When ignition switch is in On position, system voltage is applied through ignition fuse to radiator fan switch. Fan switch closes when engine coolant
temperature reaches 208°F. With fan switch closed, voltage is applied to radiator fan motor. Since fan motor is permanently grounded, fan operates as
soon as voltage is applied. When temperature falls below 199°F, fan switch opens and voltage to fan motor is interrupted.
A/C Condenser Fan
When ignition switch is in On position, system voltage is applied to dual pressure switch through heater fuse on vehicles equipped w/automatic
transaxle, or ignition fuse on vehicles equipped w/manual transaxle. Dual pressure switch remains closed as long as refrigerant pressure is between
30-383 psi. With dual pressure switch closed, voltage is applied to A/C clutch relay. A/C clutch relay is energized when A/C amplifier grounds coil of
relay. With A/C clutch relay energized, voltage is applied through A/C fuse and closed contacts of A/C clutch relay to coil of A/C condenser fan relay.
Since A/C condenser fan relay is permanently grounded, relay energizes, contacts close, and voltage is applied to condenser fan. Since condenser fan is
permanently grounded, fan operates as soon voltage is applied.
