Alternator: Service Precautions

You must:
- never disconnect the battery while the alternator is running;
- never remove the alternator while the battery is connected;
- never test the alternator in the car or on a test bench unless the battery is connected;
- never reverse the polarity of the battery (this may result in serious damage to the alternator).

Alternators should be overhauled and repaired only by specialist workshops.
It is extremely important that they are dismantled and tested correctly, as even minor errors can lead to serious damage.

Important: To avoid damage to the diodes, disconnect the negative battery cable and all alternator connections before carrying out any electric welding on the car.