How to use a multimeter diagram for car leakage, how to solve the leakage

Leakage of the car will consume a large amount of battery power. If the battery power is insufficient or there is a power loss, it will affect the use of on-board electrical appliances, and it will also cause the car to start difficult or even unable to start. The dark current leakage of the battery is a major factor that causes the battery to lose power. The so-called dark current is the current that the battery provides to the anti-theft device and other security devices through external discharge when the car is turned off. Car leakage can be detected with a multimeter, then how to use it? Let's understand it below.

Multimeter detects car leakage

1. Turn off all electrical equipment on the car and disconnect the negative pole of the battery;

2. Set the multimeter to the 10A or 20A current position, connect the red test lead to the negative terminal of the battery, and connect the black test lead to the negative terminal;

3. Press the remote control to lock the car and observe the current value of the multimeter;

4. When the car is locked, the current will be relatively large. After waiting for about 30 seconds, the current will drop to less than 50 mA, which is within the normal current range. If it exceeds, it means that the car is leaking.

In addition to the elimination of battery faults due to car leakage, it is most likely due to abnormal leakage in the anti-theft circuit or other circuits. At this time, the car needs to be checked.fuse, To exclude one by one. The most direct way is to remove the corresponding fuse for troubleshooting. If the leakage value returns to the normal range after removing the anti-theft fuse, it means that there is indeed a ground leakage fault in the circuit, and it needs to be dealt with in time.