Precautionary measures
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. It is also possible failure of the electrical equipment of the car.
- 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 an internal combustion engine with a volume of up to about 2.5 liters must be at least 16 mm: (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 wires of the launch investment.
Both batteries must have a nominal voltage of 12 volts. The capacity of the supply battery should not be less than the capacity of the receiving battery.
If the battery is closed with a cover, then it must be removed before connecting the power battery.
A discharged battery can freeze even at -10°C.
A frozen battery must be thawed before connecting the start aid cable. In addition, a discharged battery must be properly connected.
1. Check the electrolyte level in the discharged battery. Top up with distilled water if necessary and screw in the cell plugs.
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 «R» = «parking».
4. Turn off all current consumers, including the phone in the car.
5. Start the engine of the supply vehicle at least one minute before starting the engine of the receiving vehicle, and while starting the receiving vehicle, leave the engine of the supply vehicle to idle.
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 order (see illustration):
- 1. Connect red wire 1 to the positive pole of the battery of car A, whose engine is to be started.
- 2. Connect the other end of the 3 red wire to the positive pole of the vehicle's B battery.
- 3. Connect black wire 3 to the negative pole (-) power battery.
- 4. Connect the other end of the 4 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.
A metal part that is firmly screwed to the power unit is best suited for this. 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), forming a closure on «mass» (-).
7. Start the car engine with the discharged battery and leave it to 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. In this case, it is recommended to try to determine the cause of the difficult start.
After successfully starting the car engine with a dead battery, leave the engine idling 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 to connection. First, terminal 4 is disconnected from the battery of the receiving vehicle (-) black wire, and then terminal 3 - from the supply battery. Red wire 2 (+) is first disconnected from the battery of the supplying vehicle, and then from the receiving vehicle.
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