What is the function of the fuel warning light?

Answer:

To inform the driver about the amount of fuel in the tank
Discussion:
Many cars, motorcycles and other terbaru 
vehicles have fuel warning light vehicles. The warning light is usually red. It will switch on automatically when the level of fuel in the tank is very low. The warning light gives the driver information about the amount of petrol in the tank. When the light switched of red, it tells the driver that 
the petrol in the tank is almist empty. Therefore he has to put more fuel in the tank. How does the fuel warning light work?
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