The key to prevent spontaneous combustion is to prevent short circuit
　　In some single-wire cars, the damaged insulator of the live wire or the electric wire will lead to short circuit, especially some vehicles with long service time, old and disordered lines. The "protective god" of electric wire on the car is fuse, once electric wire short circuit instantaneous generation of large current fuse will be quickly fused, so as to make the current short circuit. However, if the fuse is too big, such as someone trying to replace the standard fuse with copper wire, resulting in loss of protection function, it is possible to make the short circuit of the wire into a fire.
　　In addition, single-wire system of vehicles on the battery fire line (positive line) and the vehicle metal body contact short circuit, will also produce a fire. Therefore, once it is found that the ammeter indicates a large discharge current, electrical work suddenly interrupted (such as headlights, air conditioning motor and other heavy load electrical equipment), smell the smell of rubber or see the hood cover edge gap and smoke near the instrument panel should be quickly pulled over to stop the fire, disconnect the whole car main power switch, check the cause of troubleshooting.