Have you stopped using the rear defroster, nervous at the dimming you see in the dash lights when you switch it on? If so, you could have a problem brewing with your Isuzu alternator. Often, when the Isuzu alternator fails, there is a gradual reduction in its function that can cause such a symptom. The Isuzu alternator is made up of three separate sections, each producing a separate flow of voltage, one section at a time in turn, allowing it to produce enough power to charge the battery as the vehicle idles. Often one section will fail, reducing the power level produced, but not causing a total failure in the Isuzu alternator. The Isuzu alternator is the key component in the charging system of your vehicle, working constantly as the vehicle runs, to produce enough power to keep the battery supplied and able to handle the large amount of electric energy drawn by the vehicle. There are many essential vehicle systems that need a consistent supply of electrical power to function. Among these are the vehicle computer, the engine cooling fan, ignition coils, and the vehicle lighting system. There are plenty of conveniences that draw power as well, such as power windows, air conditioning, and sound systems. With all of this power demand, the Isuzu alternator is crucial for the operation of the vehicle, as the reserve power of the battery would not hold up for long against such a draw of power. Our online catalog contains a quality selection of Isuzu alternator replacements at great prices. Our expert customer service will make ordering your Isuzu alternator on our secure site easy, or our toll-free phone line is available for your convenience.