What are the methods for testing car leakage?

[BrooklynLee]

Testing car leakage methods include: 1. Current detection method: Adjust the multimeter to ammeter mode and observe the ammeter reading. If the measured current value is too large, it indicates a leakage fault in the vehicle. 2. Resistance detection method: Use an analog multimeter. If the pointer does not move and the resistance value is very high, it indicates normal conditions with no leakage. If the pointer deflects and shows a few ohms or tens of ohms, it indicates abnormal conditions with a short circuit. 3. Empirical detection method: Disconnect the ignition switch, remove the negative terminal of the battery, then touch the terminal to the negative battery post and observe the spark intensity. The stronger the spark, the more severe the leakage phenomenon.