Several precautions must be observed when performing work on the alternator:
- If the battery is removed for any reason, make sure that it is reconnected with the correct polarity. Reversing the battery's polarity may result in damage to the one-way rectifiers.
- Never operate the alternator with the main circuit broken. Make sure that the battery, alternator, and regulator leads are not disconnected while the engine is running.
- Never attempt to polarize an alternator.
- When charging a battery that is installed in the vehicle, disconnect the negative battery cable.
- When utilizing a booster battery as a starting aid, always connect it in parallel; negative to negative, and positive to positive.
- When arc (electric) welding is to be performed on any part of the vehicle, disconnect the negative battery cable and alternator leads.
- Never unplug the PCM while the engine is running or with the ignition in the ON position. Severe and expensive damage may result.
