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How to install a new battery after removing the car battery?
When disassembling the car battery, take protective measures first, remove the battery protective cover, turn off the ignition switch, and take out the battery. And it should be fixed during installation, reset the system, and install protective measures after confirming that it is correct. Next, I will introduce the detailed content to you.
1. How to disassemble the car battery
1. Confirm the battery installation location. Most models are installed in the engine compartment or luggage compartment. Some models are also installed in the cockpit. Take body protection measures at the corresponding locations.
2. Remove the battery protective cover and other external protection devices, use a multimeter to measure the voltage between the two poles, or check the battery status through the observation hole, and explain these conditions to the customer.
3. If the vehicle has an anti-theft system (including audio anti-theft), you can first connect the external power supply, or connect a battery with sufficient power in parallel. Pay attention to connect the positive pole first and then the negative pole. The positive pole of the external power supply can be directly connected to the positive terminal of the battery, but the negative pole should not be directly connected to the negative terminal of the battery, but should be connected to the ground of the car body.
4. Turn off the faulty ignition switch, first disconnect the negative cable of the battery, and then disconnect the positive cable. If the battery has a breather tube, remove it first.
5. Remove the battery fixture and take out the battery. If the vehicle is connected to an external power supply, be careful not to let the positive wire come into contact with the vehicle body. Use cotton cloth to isolate it.
6. If the old battery is leaking and corroded, the battery connecting wires need to be cleaned.
2. How to install car battery
1. Before installing a new battery, if the battery brands and models are inconsistent, compare the dimensions and terminal positions of the new and old batteries, and carefully check the battery capacity and cold starting current parameters.
2. If conditions permit, a battery tester should be used for testing. After some batteries have been stored for a long time, although the voltage between the positive and negative electrodes is higher than 12V, the actual capacity is not enough, which is the so-called "virtual electricity". This The battery needs to be charged. It should be noted that measurement must be carried out when the ambient temperature is higher than 0°C, and charging must be carried out when the ambient temperature is higher than 5°C.
3. Place the new battery into the installation position and secure it. For batteries with a breather tube, don't forget to remove the breather tube connector from the old battery and install it on the new battery. For lead-acid batteries, pay attention to the inclination angle of the battery not exceeding 30° during installation.
4. When connecting the battery wiring, connect the positive terminal first and then the negative terminal. After installation is completed, anti-rust protective agent or acid-free grease can be sprayed on the battery terminals for protection.
5. After checking and confirming that the tightening is reliable, you can remove the external power supply. Start the engine and check the generator voltage. You can measure it at the generator output or on the battery terminal. If you have special diagnostic equipment, you can also read the voltage data in the data stream.
6. For vehicles whose batteries are replaced due to discharge failure, the dormant current of the vehicle should also be checked. The traditional method is to put the multimeter in the current block, then connect it in series to the negative line of the battery, lock all door locks, turn off the ignition switch and activate the anti-theft system, and let it sit for a period of time until the current stabilizes.
7. For vehicles equipped with a power management system, a sensor is installed in the negative line. Such vehicles can only use equipment such as clamp-type ammeters for current testing.
8. After replacing the battery, you should also use the diagnostic tool to clear the relevant fault codes recorded in the system. For vehicles equipped with a power management system, you also need to enter the new battery model into the power management system and perform a system reset.
9. After confirming that the electrical system is checked correctly, install the battery protection device, remove the body protection device, and close the engine cover or luggage compartment cover.
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