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How to diagnose a faulty alternator in an Audi A6?

When your Audi A6 starts to experience battery issues, it could be a sign of a failing alternator. The alternator is responsible for charging the battery while the engine is running. If it is not functioning properly, it can lead to a drained battery and ultimately leave you stranded. How can one properly diagnose the alternator in an Audi A6?

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First, start the engine and use a multimeter to check the voltage at the battery terminals. It should be around 13.8-14.4 volts. If it is lower than that, the alternator is not charging the battery properly.

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