How is an automotive electrical circuit composed?

[DiAaron]

The composition of an automotive electrical circuit includes: 1. Power source: namely the battery and alternator, whose function is to ensure that all electrical devices in the vehicle can operate normally under various conditions; 2. Circuit protection devices: they serve a protective role in the circuit, cutting off the circuit when the current exceeds the specified limit to prevent damage to wires and electrical devices; 3. Control components: engine control unit, automatic transmission control unit, and manual control switches; 4. Electrical devices: starter, air conditioning equipment, lighting; 5. Wires: they connect other components to form the circuit, with the vehicle body used as part of the electrical return path in place of some wires.