How to Test for Battery Self-Discharge in a Car?
1 Answers
Methods for testing car battery self-discharge: 1. Turn off the car's ignition switch and wait for 5 to 10 minutes in the locked state to allow the car to enter a dormant mode; 2. Locate the tightening nut on the negative terminal of the battery, loosen it with a wrench, then use a flathead screwdriver to pry open the tightening block, and directly 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 vehicle's grounding wire, and the black probe to the negative terminal of the battery; 4. Observe the reading on the multimeter directly. If the reading falls within the normal range, it indicates that the car's leakage current is normal.