Can the negative terminal of a car be arbitrarily grounded?

[LeEvan]

Car negative terminal cannot be arbitrarily grounded. Function of grounding wire: It uses the iron parts of the car to conduct electricity, thereby saving a wire. Grounding means connecting one of the DC electrodes (positive or negative) to the iron body of the car, while the other electrode forms a circuit through the wiring and electrical equipment. This is the function of grounding. Grounding fault: Grounding fault is a term in circuit troubleshooting, commonly seen in the automotive repair industry. A grounding fault refers to the phenomenon in the electrical equipment circuit of a car where a non-grounded wire (or terminal) directly contacts the car frame, causing the power source to form a short circuit between positive and negative poles at this point. A minor grounding fault can cause car leakage, resulting in battery depletion, while a severe grounding fault can damage the power source (including the battery and generator), burn out the wiring, or even cause a fire.