Starting the engine from an auxiliary power source will help you get out of your predicament, but you should first find out and fix the cause of the battery drain. There are three possible causes:
1. The battery has become weak as a result of repeated attempts to start the engine or leaving the lights on for a long time.
2. The charging system is not functioning properly (the alternator drive belt is loose or broken, the alternator wiring is damaged, or the alternator itself is not working).
3. The battery itself is faulty (low electrolyte level, battery life has expired).
When starting a vehicle from a jump start source, the following precautions should be observed:
- Before connecting the booster battery, make sure the ignition is off.
- Make sure all electrical loads are turned off (lighting fixtures, heater, windshield wipers, etc.)
- Make sure the booster battery has the same voltage rating as the dead battery in the vehicle.
- If starting from a battery installed in another vehicle, the bodies of both vehicles MUST NOT HAVE any points of contact.
- Make sure the transmission is in neutral (or "P" for AT).
Scheme
1. Connect one end of the red jump starter cable to the positive () terminal of the dead battery.
2. Connect the other end of the red wire to the positive () terminal of the booster battery.
3. Connect the end of the black wire provided to the negative (-) terminal of the booster battery.
4. Connect the other end of the black wire to a bolt or bracket on the engine block of the faulty vehicle that is far enough away from the battery mounting location.
5. Make sure the wires do not touch the fan blades, drive belts or other moving parts in the engine compartment.
6. Start the engine from the auxiliary battery, then, leaving it running at idle speed, disconnect the wires in the reverse order of their connection.
Connect the jump starter kit wires in the order shown in the illustration (please note that the negative cable of the booster battery is NOT connected to the negative terminal of the dead battery).