Regal V6-231 3.8L VIN L SFI (1990)
Radiator Cooling Fan Motor: Description and Operation
Late Production
Each cooling fan is turned "ON" and "OFF" by a separate cooling fan relay.
The primary cooling fan relay coil is grounded through the ECM when vehicle speed is lass than a speed determined by the ECM and the engine coolant
reached 108°C (227°F) with A/C off, and 106°C (223°F) with A/C on. The contacts close and voltage is applied through the primary cooling fan relay to
the primary cooling fan. The primary cooling fan funs until the ignition switch is turned off, or coolant temperature decreases to 104°C (220°F) with A/C
off, or 102°C (216°F) with A/C on.
The secondary cooling fan relay coil is grounded through the ECM when the coolant temperature reaches 118°C (245°F). The contacts close and voltage
is applied to the secondary cooling fan. The fan then runs at high speed and will continue to run at high speed with the ignition in "RUN" until the
coolant temperature lowers to 114°C (238°F).
