How do you fix an overcharging problem on a 1999 Mazda miata?

To fix an overcharging problem on a 1999 Mazda Miata, first check the voltage output from the alternator using a multimeter; it should be between 13.5 to 14.5 volts with the engine running. If the voltage is too high, inspect the voltage regulator, which is often integrated into the alternator, and consider replacing the alternator if it's faulty. Additionally, inspect the battery for any signs of damage or swelling, as an overcharged battery can also be the result of a failing battery. Finally, verify all electrical connections for corrosion or looseness, as these can contribute to charging issues.