Electric Cooling Fans

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Electric Cooling Fans
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Cooling fan
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Cooling fan

• There are many types, shapes and styles
• some cars have one fan some have two the main
  reason that we have a cooling fan is to cool the
  engine.
• The cooling fan is an entirely automated circuit.
  It can be turned on by just turning on the Air
  conditioner switch or it will come on when the
  sensor hits the right temperature in the engine

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Cooling fan Wiring Diagram
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Cooling fan

• The only thing missing on the last picture is a
  fuse or circuit protection between the battery
  Positive and 30 on the relay.
• How it works is when you turn on the Ignition
  switch (and all cars do not have to have the key
  on for the cooling fan to work they are hot all
  the time(CAUTION that means they can come on at
  any time)) power is at the relay ready to go but
  until you turn on the A\C or the engine is hot it
  will not come on. But when you turn on that
  switch power goes through the windings of wire
  creates a magnetic field pulls over the contacts
  and connects terminal 30 to 87 and the fan goes
  on. Some cars will have two fans one comes on
  when the A/C is turned on and the other goes on
  when the temperature cooling fan switch turns it
  on.

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Sensors
Engine Temperature Coolant Sensor
Cooing Fan Switch On this style touch to
ground and fan should come on.
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Temperature Sensor for light or gauge
Engine Temperature Coolant Sensor
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Sensors

• Make sure you know what each sensor is there
  are different types and styles.
  Some are one wire some are two wire.
• On most new cars the fan is controlled by the
  computer

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The End