Indications:
Green: Battery OK, i.e:No Water Contained in the Brake Fluid
Yellow: Less than 1% of Water Content in Brake Fluid
Yellow/Yellow: Approximately 2% of Water Content in Brake Fluid
Yellow/Yellow/Red: Approximately 3% of Water Content in Brake Fluid
The Brake Fluid Should be Changed
Yellow/Yellow/Red/Red: at least 4% of Water Content in Brake Fluid
The Brake Fluid Must be Changed Urgently, Extreme Danger