SOURCE: 2002 Monte Carlo fan does not work in 1st or 2nd fan speed.
Blower relay unit bad. common.
Located on pass. side floorboard up by duct work.
Hard to reach. Part is cheap. Looks like a little box with wires plugged in.
SOURCE: 2000 monte carlo blower switch works on only #5
Not the board. It's you blower motor resistor. It melted.
SOURCE: 1995 monte carlo overheating
If the radiator fan isn't coming on I would check the coolant temperature sensor which tells the fan to turn on. Check your owners manuel for locations of fuses or relays that control the fan. Lastly you can unplug the fan and direct jumper it to make sure the motor isn't burnt out. I hope this helps.
SOURCE: 2001 montie carlo fans wont cool off engine
i have a 2001 also just put new motor in my fan now only works!!!
SOURCE: I have 2005 monte carlo
The coolant temp sensor is on the thermostat housing at the back of the engine. See pictures below. Try taking the connector off the sensor--this should turn the fans on. If not, you may have a problem with power distribution to the fans. You can interrogate the relay sockets to verify that the PCM is sending a signal to turn the fans on. Please see my tip at http://www.fixya.com/cars/r6022358-relay_check on how to interrogate the relays. The PCM signal is a ground signal, so one of the socket terminals should be dead until the engine is hot--then it should become a ground. I have pasted the wiring diagrams below, but resolution on FixYa is not great. Please let me know if you have any questions.
3.4 liter coolant temp sensor location:
3.8 liter coolant temp sensor location:
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