Why alternator diodes fail Alternator diodes are essential components that convert the alternating current (AC) produced by the alternator into direct current (DC), which is used by the vehicle’s electrical system. Although diodes are generally robust and long-lasting, they can fail for several reasons: Age and Wear Alternator diodes can degrade over time due to the stresses of regular use. As they age, their performance can diminish, leading to eventual failure. Overheating Alternator Diodes are sensitive to temperature, and excessive heat can cause them to fail prematurely. Overheating can occur … Read More
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