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An engine accessory which generates alternating current (AC). The electricity is then fed through diodes which converts it from AC to direct current (DC), which is usable by the automobile in general. The alternator is usually driven by belts which are connected to the crankshaft of the engine which provides the motion to produce power.

2
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As a follow-up from how fast does the alternator charge the battery?, how powerful are alternators supposed to be at idle? Specifically, if I have a lot of OEM accessories in my 2008 Jetta 2.5L SE … engine cooling fans at full speed, too, and voltage immediately drops and stays below 13.2V (e.g., below 2.2V * 6), but is still above 12V, is there a problem with the alternator/voltage-regulator (mine's …
asked Aug 22 '16 by cnst
11
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there a way to determine whether the battery is getting a sufficient charge from the alternator in various operating conditions? For example, it would appear that my alternator has passed the … ), and asked for a re-test with both of the heated seats turned to the max, and same for AC, with the car at idle, they did immediately say that my alternator is failing several of their tests and I …
asked Dec 8 '14 by cnst