Installation and test: 1、 After this sensors are installed, it is necessary to adjust the axis and direction to the correct position, then arrange the wire in good order; 2、 To connect the power wire of the control box with the turning light correctly； 3、 To connect the digital display with the control box well; 4、 To put the gear lever to reverse gear, then radix point in the display should be lighted, it indicates that the system is under detecting status; If not, please check it as following steps;