How can you wire your electric fan on a 95 Saturn to come when the ignition is turned It kicks now just before running hot and would run better if came sooner?

The Saturn's cooling fan likely uses a temperature sensor (often called a coolant temperature sensor or CTS) to trigger it. The fact it only kicks on just before overheating indicates the sensor or its wiring is working, but the activation temperature is set too high. Wiring it to come on with the ignition would bypass this sensor and force the fan to run constantly, which isn't ideal as it will draw power and may not be necessary all the time. It's also potentially damaging to the fan and its components to run constantly.

Instead of wiring it directly to the ignition, you should explore these options:

1. Check the Coolant Temperature Sensor (CTS): The CTS might be faulty, reading a lower temperature than the actual coolant temperature. A faulty CTS will cause the fan to activate later than it should. Replacing it with a new sensor is the cheapest and easiest first step.

2. Check the Fan Relay: The relay might be sticking or failing to activate promptly. A new relay is an inexpensive fix.

3. Adjust the Fan's Activation Temperature (If Adjustable): Some cooling fan systems allow for adjusting the temperature at which the fan turns on. This is usually done via a resistor or a different type of sensor. Consult your vehicle's repair manual to see if this is possible on your Saturn.

4. Install a Lower Temperature Thermostat: A thermostat that opens at a lower temperature will allow coolant to circulate through the radiator sooner, potentially alleviating the need to rely solely on the electric fan. This would improve cooling *before* the fan even needs to kick in.

5. Add a Manual Switch: As a last resort, you could add a switch to manually turn the fan on. This isn't the ideal solution as it requires you to remember to switch it on, but it would allow you to bring the fan on earlier if needed. However, it would still be important to identify and fix the underlying issue as the constant fan operation isn't good for the components. Wiring this would require knowledge of automotive electrics and proper safety precautions. Incorrect wiring can damage the electrical system of your car and may be dangerous.

Important Note: Wiring the fan directly to the ignition will bypass the safety mechanisms built into the system. This is strongly discouraged. Always prioritize fixing the underlying problem, not just masking its symptoms.

Before undertaking any electrical work, disconnect the negative battery terminal. If you're not comfortable working with car electrical systems, consult a qualified mechanic. They can diagnose the issue properly and fix it safely. The risks of improper wiring outweigh any potential benefit of forcing the fan on through a poorly done modification.