What is wrong with the Audi Q5 alternator?

The reason why the Audi Q5 alternator light is not turning on and producing electricity: If there is a problem with the alternator, the charging light is always on after starting and the alternator is not producing electricity. If the line is normal, there is often a problem with the diode. Now check if there is any problem with the circuit. Typically, a multimeter is used to measure resistance or a test light is used to check. If the diode is damaged, simply replace it. It is easy to distinguish between producing and not producing electricity. If you confirm the generator wiring is correct but still not producing electricity, it is a fault. Usually the generator voltage regulator is faulty. If the light stays on or doesn't come on at all, consider replacing the regulator first. If replacing the regulator still does not resolve the problem eIf several excitation lines are normal, you can check the rotor resistance value. Generally, it is a few ohms. If it exceeds 10 ohms or 0, it is not a rotor fault. The rotor normally replaces the stator coil of the generator rectifier circuit board and almost does not burn.