Attention! If the prescribed procedure is not followed, there is a risk of burns from acid escaping from the battery. In addition, there is a risk of injury and injury if the battery explodes. Damage to the vehicle's electrical equipment is also possible.
Beware of electrolyte contact with eyes, skin, clothing and varnished body surface. It has a corrosive effect. If electrolyte is spilled, wash it off with clean water and, if necessary, consult a doctor.
Keep sparks or open flames away from the battery. Wear protective goggles.
Protect the booster battery wire from being damaged by rotating parts such as radiator fan blades.
The cross-section of the wire to facilitate the start of a bi morning combustion engine with a volume of up to about 2.5 liters must be at least 16 mm2 (diameter about 5mm).
For diesel engines and internal combustion engines with a working volume of more than 2.5 liters, the cross section must be at least 25 mm2. In this case, you need to focus on a car with a discharged battery.
The cross section of the wires is usually indicated on the packaging of the starting aid wires. When buying wires to facilitate starting the engine, it is recommended to purchase wires with insulated clamps and a cross section of 25 mm2, because such wires are also suitable for cars with a smaller engine displacement.
Both batteries must have a nominal voltage of 12 volts.
A discharged battery can freeze even at -10°C. A frozen battery must be thawed before connecting the start aid cable.
A discharged battery must be properly connected to the on-board network.
1. Check the electrolyte level in the discharged battery. Top up with distilled water if necessary.
2. Place the cars in such a way that their metal parts do not touch, otherwise a current may already occur when the positive poles are connected.
3. Apply the handbrake on both vehicles. Set the manual transmission to neutral, the automatic to neutral «R» = «parking».
4. Disconnect all current consumers of the on-board network.
5. Set the engine of the supply vehicle to idle without fail. This prevents the vehicle's alternator from being damaged by voltage spikes when starting a second vehicle.
6. Connect the starting aid wires in the following sequence:
- A) Connect red wire 1 to the positive pole of the discharged battery on vehicle A;
- b) Connect the other end of the red wire (+) to the positive pole of the supply battery of car B;
- V) Connect black wire 2 to the negative pole of the power battery;
- G) Connect the other end of the black wire to a good ground X of the receiving vehicle.
Attention! Do not connect the wire to the negative pole of a discharged battery. The best thing for this is a metal part, firmly screwed to the hoarse unit. When connecting a wire to the negative pole of a discharged battery, it, under adverse conditions, may explode due to sparking and the formation of explosive gas.
Attention! The terminals of the connected starting aid wires must not be in contact with each other. The wire terminals from the positive battery terminal must not touch metal parts (bodies or frames).
7. Start the car engine with the dead battery and let it idle. When starting, operate the starter continuously for no more than 10 seconds, as the terminals and wires heat up due to the high current consumption. Therefore, it is necessary to provide «cooling» pauses of at least half a minute.
If the engine starts with difficulty, do not operate the starter for a long time unnecessarily. When starting, there is a constant injection of fuel into the system. It is better to establish the cause of the difficult start.
After successfully starting the car engine with a dead battery, leave the engine to idle and do not dismantle «electric bridge» for at least 3 minutes.
To avoid voltage peaks when disconnecting auxiliary wires, turn on the passenger compartment airflow and rear window heating on a car with a discharged battery. Do not turn on the headlights, otherwise their bulbs will burn out from the voltage drop.
8. Disconnect the auxiliary wires after starting the engine in the reverse order of connection. Black wire first 2 (-) disconnected from the receiving car, and then from the battery supply. Red wire 1 is first disconnected from the battery of the supplying car, and then from the receiving one.