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Check the temperature sensor
The cooling fans on a 99 Nissan Maxima will not come on if the coolant temperature sensor is defective. The fan only comes on when the temperature passes a threshold.
Where is the engine cooling fans sensor located on a 2000 Corvette ? Screwed in the driver side cyinder head just behind the Alternator. this is referred to as the temperature sensor. Hope this helps. Mike
The cooling fans on a 2002 Grand Am GT might not be working because of a problem with a fuse. There is also a temperature sensor in the engine that tells the fans when to come on. This sensor may be bad.
Your temperature sensor or a fuse is bad.
replace the cooling temperature sensor
Cooling fans are controlled by the computer based on input from temperature sensor. After the vehicle is shut down, if the temperature is still high, the computer will turn on the fans to cool the engine.
There is no temperature control switch for the cooling fans. The PCM Power control module receives input from the temperature sensor on the water outlet housing. The PCM turns on the fans when the temperature reaches 210 degrees through the CCRM.
The cooling fans turn on utilizing a temperature sensor and a relay. When the engine gets to a certain temperature the temp sensor closes and the cooling fans come on. Check fuses first. If you have a 12 volt test light, hook up the test light to the connector that goes to the cooling fans once the engine is warmed up and see if the light comes on. If it doesn't, the problem is in the power to the fans, check fuse, sensor and relay. If the light comes on and the fans don't, check for a proper ground (usually a green or black wire attached to a lug and bolted to the car chassis.
is the coolant temperature sensor giving a correct reading to the computer? Is the fan getting power?
in the boot
Check to see if they are getting power Could be a bad temperature sensor Check to see if they come on with A/C or defroster