Several precautions must be observed with alternator equipped vehicles to avoid damaging the unit. They are as follows:
If the battery is removed for any reason, make sure that it is reconnected with the correct polarity. Reversing the battery connections may result in damage to the one-way rectifiers.
When utilizing a booster battery as a starting aid, always connect it as follows: positive to positive, and negative (booster battery) to a good ground on the engine of the car being started.
Never use a fast charger as a booster to start cars with alternating current (AC) circuits.
When servicing the battery with a fast charger, always disconnect the car battery cables.
Never attempt to polarize an alternator.
Avoid long soldering times when replacing diodes or transistors. Prolonged heat is damaging to alternators.
Do not use test lamps of more than 12 volts (V) for checking diode continuity.
Do not short across or ground any of the terminals on the alternator.
The polarity of the battery, alternator, and regulator must be matched and considered before making any electrical connections within the system.
Never separate the alternator on an open circuit. Make sure that all connections within the circuit are clean and tight.
Disconnect the battery terminals when performing any service on the electrical system. This will eliminate the possibility of accidental reversal of polarity.
Disconnect the battery ground cable if arc welding is to be done on any part of the car.