Car short circuit is a common fault in the electrical system and requires immediate attention to prevent fire or equipment damage. When signs of a short circuit are detected (such as smoke, burning odor, or abnormal electrical operation), promptly turn off the engine, stop the vehicle, and disconnect all power sources including lights and audio systems. Priority should be given to inspecting the fuse box and replacing blown fuses with identical specifications; repeated fuse failures necessitate further troubleshooting. Use a multimeter to measure circuit resistance, with particular focus on checking for exposed or deteriorated wiring in high-wear areas like the engine compartment and door hinges, while also examining electrical components (such as the alternator and air conditioning compressor) for faults. Damaged wiring should be replaced and properly insulated; poor plug contact requires cleaning and reinforcement; for complex short circuits, professional technician intervention is recommended. Preventive measures include: regular circuit inspections, avoiding unauthorized installation of electrical accessories (especially high-power devices), promptly draining undercarriage water after rainy weather, and parking in dry locations. Safety precautions must be observed: wear insulated gloves after disconnecting power, avoid open flames, and never attempt repairs beyond one's technical capability. Repair costs vary by damage severity: basic fuse replacement costs approximately 10-50 ringgit, while wiring repairs or component replacements may range from hundreds to thousands of ringgit.
