The CTS monitors the engine's temperature and sends signals to the cooling fan control module. A faulty CTS can provide incorrect temperature readings, causing the fan not to turn on when it should.
2. Cooling Fan Control Module Failure:
The cooling fan control module is responsible for regulating the fan's operation based on input from the CTS. If this module fails, the fan may not receive power, even if the engine temperature is high.
3. Fan Motor Issues:
The cooling fan motor itself can malfunction due to wear and tear or electrical problems. Test the fan motor directly by applying power from the battery to see if it operates.
4. Wiring Problems:
Check the wiring between the cooling fan control module, CTS, and the fan motor for any loose or damaged connections. Poor wiring can disrupt signals or prevent power from reaching the fan.
5. Relay Malfunction:
Some Buick Skylark models use a cooling fan relay to control the fan's power. If the relay fails, it can interrupt the power supply to the fan motor.
6. Faulty Thermostat:
A faulty thermostat may cause the engine to run hotter than normal, which can lead to insufficient cooling and fan activation problems.
7. Low Coolant Level:
A low coolant level can lead to overheating and cooling system issues. Ensure that the coolant level is adequate as per the manufacturer's specifications.
It's important to properly diagnose the cause of the cooling fan not working to ensure efficient engine cooling and prevent potential engine damage. If any electrical components are involved, it's advisable to consult a professional mechanic or auto electrician.
