1) Battery: Even though you mentioned the battery is good, it's still worth checking the battery terminals to make sure they are clean and free of corrosion. Clean them if necessary, and ensure the battery terminals are tight and making good contact with the battery posts.
2) Starter: The clicking noise you hear when you turn the key may be coming from the starter. If the starter is faulty or not receiving enough power, it can cause the clicking sound but not engage the engine. Try tapping the starter lightly with a hammer while someone else turns the key to see if it starts. If it does, the starter may need to be replaced.
3) Ignition Switch: The ignition switch may be faulty and not sending power to the starter. Try moving the key to different positions and see if the clicking changes. If it does, the ignition switch may need to be replaced.
4) Neutral Safety Switch: If your Saturn SL2 has a manual transmission, the neutral safety switch may be preventing the starter from engaging. This switch ensures the car is in neutral before starting. Check if the neutral safety switch is properly connected and functioning.
5) Wiring: There may be a problem with the wiring between the battery, starter, and ignition switch. Check the wiring for any loose connections, damaged wires, or corrosion.
If you are not comfortable performing these checks, it's best to have your car inspected by a qualified mechanic to determine the exact cause of the issue and have it repaired accordingly.
