Voltage Regulator

The voltage regulator controls the amount of voltage produced by the alternator. This allows the charging system to be protected from excessively high voltage that could damage the battery or other electrical components. It also helps maintain a constant voltage within the charging system. Depending on the age of your vehicle, the voltage regulator can be found inside the alternator or mounted separately inside the engine compartment. If you are experiencing dim dashboard lights or headlights, battery charging problems, or frequent light bulb replacements, this may point to a problem with the regulator. O'Reilly Auto Parts carries replacement voltage regulators for cars, trucks and SUVs.