Firebird V8-305 5.0L VIN E (1992)
Radiator Cooling Fan Motor: Description and Operation
The coolant fan is activated by the coolant fan Switch. The switch closes when the coolant temperature is over 110°C (238°F), completing a path to
ground through the coolant fan relay windings. The relay contacts then close and voltage is applied to the coolant fan. When the coolant temperature
drops to 101°C 214°F), the switch opens and the coolant fan stops.
In A/C equipped vehicles, the A/C control head completes a path to ground for the coolant fan relay when the Air Conditioning is on. Voltage is then
applied to the coolant fan.
