What to do cooling fan will not work on a base

Cooling fan doesn't work - YouTube

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www.youtube.com/watch?v=CPwzmyraGtg

Jul 19, 2009 - Uploaded by realfixesrealfast
This cooling fan use's a "cooling fan dropping resistor" to achieve low speed. It's pretty easy to ...

[Help] Radiator fan no longer works? - Automotive ' DSLReports Forums

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DSLReports
Nov 9, 2007 - 30 posts - ‎5 authors
Forum discussion: I have a Chevrolet Cavalier 2001 Base Model car. ... he thinks something else may be wrong with it still, since the fan doesn't turn on. .... ok you confused me... all I know is my temperature gauge is working.

There is no A/C temperature sensor , there is an engine coolant temperature sensor . What kind of problem are you having ? The only sensor directly connected to the A/C system is a refrigerant pressure sensor . Your A/C not working , no cooling fan operation ?

The cooling fan is controlled by the PCM - powertrain control module through a relay ! There is no cooling fan sensor , there is a coolant temperature sensor ! This coolant temperature sensor is an input to the engine computer , if there were a problem wit the sensor the check engine light would be on .
Cooling Fan Control
The engine cooling fan system consists of one cooling fan and one relay. The relay is powered by the battery positive voltage circuit and controlled by a switched ground from the powertrain control module (PCM).
During operation, the PCM supplies the ground path for the cooling fan relay through the cooling fan relay control circuit. This energizes the cooling fan relay coil, closes the relay contacts, and supplies battery positive voltage from the cooling fan fuse through the cooling fan motor supply voltage circuit to the cooling fan. The cooling fan motor is grounded through its own ground circuit.
The PCM commands the fan on under the following conditions:
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Engine coolant temperature exceeds approximately 106?°C (223?°F).

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A/C refrigerant pressure exceeds 1310 kPa (190 psi).

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A/C is requested and vehicle speed is below 100 km/h (62 mph) with A/C pressure above 1413 kPa (205 psi).

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Vehicle speed is less than 8 km/h (5 mph) for more than 750 seconds. The fan will turn off when vehicle speed is greater than 8 km/h (5 mph) for more than 20 seconds.

Sounds as if,the cavalier,may have an internal blown head gasket.

I think it could be the computer

If your engine cooling fan motor is not working first check the maxi fuse
under the hood in the fuse box. If the fuse is burnt out then more that likely the cooling fan motor is drawing to much and will also need to be replaced.

REPLACE THERMOSTAT BUT IT SOUND LIKE FAULTY COOLANT TEMPERATURE SENSOR.BUT CHECK COOLING FAN FUSE AND RELAY.IF ALL IS GOOD HOT WIRE COOLING FAN IF COOLING FAN WORKS.PROBLEM COULD BE FAULTY COOLANT TEMPERATURE SENSOR. DAMAGE FAN WIRING OR FAULTY PCM.IF COOLING FAN DONT RUN WHEN HOT WIRED.REPLACE FAN AND MOTOR.

1996 Chevrolet Cavalier 2.2L SFI OHV 4cyl

This is a sample for an 1996 2.2L (VIN 4) engine schematic...


You can find more details and the Repair Guide about your model in autozone.com (free register). Select the Year, Make, Model and Engine for access.

I hope help you with this (remember rated this help) Good luck.

make sure electric coolant fan is running.if not check or replace fan relay.the coolant fan has to be running to cool down refrigerant in condensor.so refrigerant in condensor is cooled back down to high pressure liquid so it can go to evaporator.see ifcoolant fan not working.the AC is not going to cool.when you driving the condensor is cooling down from moving air when car is going.when you come to a stop.cooling fan suppose to be on so condensor gased can be cooled down.

Most probable cause is a bad BLOWER MOTOR RESISTOR (BMR). This part is located underneath the right side of the dash mounted into the blower motor housing. The BMR has a circuit board that is suseptible to corrosion and moisture damage because it is in an enclosed area with much condensation. After replacing it a couple of times, the 3rd time I dipped the circuit board in TOOL DIP - the stuff you rubber coat screw drivers with - have not had a problem since (3 years).

Chris Musanté