How to Check for Current Leakage with a Car Multimeter?

[SanIsabelle]

Methods for checking current leakage with a car multimeter: 1. Set the multimeter's knob to the current measurement setting; 2. After selecting the range, insert the red probe into the corresponding socket; 3. Once the multimeter is properly set up, turn off the engine and all electrical devices, then lock the car doors; 4. Open the hood, disconnect the negative terminal of the battery, connect the multimeter's red probe to the vehicle's ground wire, and connect the black probe to the negative terminal of the battery. Observe the current displayed on the multimeter. Causes of car current leakage: 1. Short circuit or oxidation and shedding of the battery plates leading to self-discharge and power loss; 2. Grounding of electronic components and circuits in car electrical devices, wiring harnesses, sensors, controllers, and actuators.