Answer by Englishangel. Confidence votes 12.5K. This is the sort of question you should ask the person who examines you. Medical professionals use a lot of lingo that the lay person doesn't understand and the doctor or midwife doesn't think twice about it so ask if you don't understand. a long cervix is quite normal.
The fan or fans should run when the coolant temperature in the radiator is above the temperature of the thermostat for your vehicle. Probably around 190 degrees. The answer should be in your operators manual as to what temperature a fan or fans should come on. Sometimes just one fan will operate if the water temperature dictates.
TEMP SW Cooling Fan when Air Conditioning is Turned ON COOLING FAN THERMOSTAT OR TEMP SWITCH 30 AMPS MAX OR! STEEL CHASSIS #10 STEEL CHASSIS #16 GROUND FAN GROUND T E M P S W #18 #10 STEEL CHASSIS TO A/C COMPRESSOR FROM A/C THERMOSTAT RAD FAN SW RAD FAN SW AC CLUTCH SW AC CLUTCH SW TRINARY SWITCH (Installs on High Pressure refrigerant line) The radiator fan switch closes when the refrigerant pressure reaches approximately 250 psi. The Cooling Fan output is activated when Ignition is On and the Temp Sw terminal is grounded. ENGINE COOLING FAN CLUTCH POWER CENTER GROUND GROUND GROUND Note that the Trinary Switch will turn on the Radiator Cooling Fan by grounding the Power Center Temp Sw terminal as soon as the refrigerant pressure gets high enough. Then when the engine temperature gets warm enough the Engine Temperature Switch or Thermostat will close and keep the Cooling Fan on even if