It is a Voltage Regulator, used in a car with the make Mercury Tracer to regulate the voltage and thus the electrical operations needed in the make. This Voltage Regulator was developed for shielding the battery from high output voltages of the alternator, thus it operates maintaining the voltage at a range of 13.5 to 14.5 volts for efficiency and safety. Unlike many other regulators, the Mercury Tracer Voltage Regulator keeps a constant check on the battery voltage and the overall voltage demand on the system it is protecting; when charging is required, the regulator boosts the field current to the alternator rotor with extra current, but decreases it when the battery voltage is high. This sophisticated regulation is quite appropriate especially because the new 'mechanical' type of solid State Voltage Regulators are very efficient in that they only switch about 7000 times per second. The Mercury Tracer exists between 1987 and 1999, and includes different models, hatch and sedan; all are enhanced by this innovative Voltage Regulator technology. By linking with the PCM, Voltage Regulator also incorporates alteration and additional factors such as battery temperature and engine load. Notably, in the auto-market, the Mercury Tracer Voltage Regulator is uniquely designed with high durability and versatility, making sure that many Tracer models function well to make sure that drivers enjoy a worthy vehicle. Mercury Tracer Voltage Regulator biasing on the performance and safety aspects form the basic noble part that defines the entire Mercury Tracer legacy.