The fan will turn on automatically when the engine coolant temperature reaches a certain point, as sensed by the coolant temperature sensor. This sensor's signal is interpreted by the PCM, which then sends the signal to activate the relay that powers the electric fan.
Therefore, there's no "electric fan switch" to locate. Troubleshooting a non-functioning fan involves checking:
* Coolant Temperature Sensor: This sensor is a common failure point. It's usually located in the engine block or cylinder head.
* Relay: The relay is an electrical switch that is activated by the PCM. It's often located in the underhood fuse box or a separate relay center.
* Wiring: Check the wiring harness for any breaks, shorts, or corrosion.
* PCM: Though less common, a faulty PCM can also cause fan problems.
If the fan isn't working, you'll need a wiring diagram and a multimeter to diagnose the problem. A Haynes or Chilton repair manual for your specific year and model Camaro will be invaluable.
