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the cooling fan fusible link comes off the battery cable then goes down to a plug that turns up towards the fan relay and also the alternator.
It is a grey wire that comes off the starter and turns into the Big Red single wire that goes into the cooling fan relay right above the radiator fan.
If radiator cooling fan it turns on only when temperature sensor reaches temp needed to cool car, then when enough cooling takes place, it gets told by sensor to turn off.
The fan relay turns the radiator cooling fan on and off. The most common location for this relay is mounted on the front left frame rail.
not likely PCM problem... most common cause is either ... Bad Cooling Fan Relay Blown Cooling Fan Fuse or Bad Cooling Fan Motor
Sounds like the black box at the top of the radiator.
apparently the switch that controls when the fan kicks on and off is bad.
Answer: If you mean your radiator cooling fan, it most likely is a grounded or shorted circuit from the "cooling fan sensor" (internal) or a pinched wire. Depends on when it happened: was there any work done prior to this happening? IF not, then the sensor is most likely the issue. In this case, once you find it (normally the sensor is screwed into the bottom of the radiator), unplug one of the wires (or remove the connector) and see if the cooling fan continues to run, if the fan turns off, then replace the sensor.
Well, it is not a ghost. One thing is if you had it on and then the Power goes off, then if the power goes back on, it turns on. Second is that you might hit it and not nodest it
There is a temperature sensor in the motor. When it gets hot enough it completes a circuit and causes a relay to close and turns the fan on. There is power to the fan all the time, the sensor and relay supply the ground for the fan Engine cools down, the sensor opens and shuts the fan off.
I believe it turns on and off the fan (1 out of 2) that cools the engine according to the temperature it's at. If it doesn't work the engine may not know to turn the fan on and the engine could overheat. Here's a tip. When you turn on your A/C or Heater, both fans come on. The A/C cooling fan and the Engine Cooling fan.
When operating properly, the cooling fan stays on until the temperature drops to normal.