How to Detect if a Car Has an Electrical Leak?

[SanKiara]

Here are the methods to check for an electrical leak in a car: 1. Observe the color of the battery's inspection hole and check if the battery's exterior is intact and whether there is any leakage; 2. Use a multimeter to measure the battery voltage and charging output to ensure they are normal, with the normal voltage being above 12 volts, and not dropping below 10 volts after continuous discharge for 10 seconds; 3. Remove the negative terminal of the battery, set the multimeter to the current measurement mode, connect the red probe to the battery's negative terminal wire and the black probe to the negative terminal post, observe the ammeter reading, and compare the measured current value with maintenance data to see if it is within the normal range. If the measured current is too high, it indicates an electrical leak in the car; 4. Turn off all electrical devices in the car, ensure the doors and trunk are locked, disconnect the negative terminal of the battery, wait for 20 minutes, then connect one end of a test light to the battery's negative wire and the other end to the negative terminal post. If the light turns on, it means the electrical devices and wiring are still leaking, and you should check the relays and fuses at this point.