How to detect a short circuit with a multimeter
From the perspective of repairing electrical faults, short-circuit faults have the following characteristics:
1. The resistance (or impedance) of the short-circuit point (ie, both ends of the short-circuit) is zero or close to zero;
2. The short-circuit circuit is very destructive. Once a short-circuit occurs, it is generally not possible to directly energize it for inspection, which is different from an open-circuit fault.
After the short-circuit fault occurs, the protection components of the circuit (such as fuses, circuit breakers, etc.) act, and the protection components may control the area composed of multiple circuits, so when looking for electrical short-circuit faults, you must first find the faulty circuit from the fault area. Then go to the fault circuit to find the short-circuit fault point.
