Observing these precautions will help avoid damage to the vehicle's electrical system and ensure safe handling of the system components:
Be absolutely sure of the polarity of a booster battery before making connections. Connect the cables positive to positive, and negative to a good ground. Connect positive cables first and then make the last connection to ground on the body of the booster vehicle so that arcing cannot ignite hydrogen gas that may have accumulated near the battery. Even momentary connection of a booster battery with the polarity reversed will damage alternator diodes.
Disconnect both vehicle battery cables before attempting to charge a battery.
Never ground the alternator or generator output or battery terminal. Be cautious when using metal tools around a battery to avoid creating a short circuit between the terminals.
Never ground the field circuit between the generator and regulator.
Never run an alternator or generator without load unless the field circuit is disconnected.
Never attempt to polarize an alternator.
Keep the regulator cover in place when taking voltage and current limiter readings.
Use insulated tools when adjusting the regulator.
Whenever DC generator-to-regulator wires have been disconnected, the generator must be repolarized. To do this with an externally grounded, light duty generator, momentarily place a jumper wires between the battery terminal and the generator terminal of the regulator. With an internally grounded heavy duty unit, disconnect the wire to the regulator field terminal and touch the regulator battery terminal with it.