What is the method for detecting battery leakage?
2 Answers
The method for detecting battery leakage: 1. Turn off the car's ignition switch and wait for 5 to 10 minutes in the locked state to put the car into a dormant state; 2. Locate the tightening nut of the battery negative terminal, loosen it with a wrench, and then gently pry open the tightening block with a flat-head screwdriver. At this point, simply pull out the negative terminal connector; 3. Set the multimeter to the DC 10A or 20A range, connect the red probe of the multimeter to the car's grounding wire, and the black probe to the battery's negative terminal post; 4. Directly observe the reading on the multimeter. If the reading is within the normal range, it indicates that the car's leakage is normal.
I've encountered battery leakage issues before, and usually I can diagnose it at home. First, make sure the car is turned off for several hours - for example, if the battery voltage drops too fast after parking overnight. I use a multimeter set to the current measurement mode, connecting it in series between the negative battery terminal and vehicle wiring to test, because normal leakage current should be below 0.05 amps. If the reading is higher, there's likely a leakage problem. Then I systematically check electrical components by pulling fuses one by one and retesting to identify which circuit is draining power. Don't forget to inspect the battery case for cracks or acid leakage corrosion - that situation requires immediate replacement. Prevention is crucial: turn off dashcams or AC when parking, otherwise the battery will fail prematurely. As an experienced driver, I can handle such minor issues without visiting repair shops, but remember safety first - always wear gloves to prevent electric shock.
