* Fan Motor Failure: This is the most likely culprit. The motor itself could have burned out due to age, overheating, or electrical issues. This requires replacing the fan motor.
* Fan Relay Failure: The relay acts as a switch, sending power to the fan motor. A faulty relay will prevent the fan from turning on, even if the motor is fine. Relays are relatively inexpensive and easy to replace.
* Temperature Sensor Failure: The engine's coolant temperature sensor tells the car's computer when to turn on the radiator fan. A faulty sensor might not send the correct signal, preventing the fan from engaging.
* Cooling Fan Control Module (CFCM) Failure (If applicable): Some vehicles have a dedicated module that controls the radiator fans. A malfunctioning CFCM can cause the fans to fail to operate. This is less common but still possible.
* Wiring Issues: A break, short, or corrosion in the wiring harness leading to the fan motor, relay, or sensor can interrupt the electrical circuit. This requires careful inspection and repair of the wiring.
* Fuse Blown: Check your fuse box (usually under the hood or in the cabin) for a blown fuse related to the cooling fan. This is a relatively easy fix if this is the case.
* Low Coolant: While it might seem counterintuitive, if your coolant level is dangerously low, the system might not turn the fan on to prevent damage. Check your coolant reservoir.
Troubleshooting Steps:
1. Check the fuses: This is the easiest first step.
2. Inspect the wiring: Look for any obvious damage, corrosion, or loose connections in the wiring leading to the fan motor, relay, and temperature sensor.
3. Test the fan motor directly (advanced): If you have some electrical knowledge, you can bypass the relay and directly apply 12V power to the fan motor to see if it works. Caution: Be careful when working with car electrical systems. Incorrect connections can cause damage or injury.
4. Check the coolant temperature sensor: This may require a multimeter to test the sensor's resistance at different temperatures. This is a more advanced troubleshooting step.
5. Check the relay: You can swap the cooling fan relay with a relay of the same amperage rating for a different circuit (if you have a spare, similar relay) to see if the fan works. This is a simple diagnostic test.
6. Have a professional diagnose the problem: If you are not comfortable performing these checks yourself, take your car to a qualified mechanic. They have the tools and expertise to pinpoint the issue quickly and efficiently.
Remember to always consult your vehicle's repair manual for specific details on your 1996 Chrysler Cirrus's cooling system and electrical components. Safety first!
