Automobile air conditioner fault setting device

An automobile air conditioner fault setting device is provided with a plurality of fault setting units, each fault setting unit comprises a multi-stage switch, the multi-stage switches are provided with gears including a normal path first gear, a circuit break fault second gear, a simulation line virtual connection fault third gear and a simulation short circuit fault fourth gear, and the normal path first gear is connected with an air blower motor. The second gear of the disconnection fault is disconnected with the blower motor, the third gear of the simulation line virtual connection fault is connected with a resistor R and connected with the blower motor through the resistor R, and the fourth gear of the simulation short-circuit fault is connected with a negative plate; and at least twofault setting units are fixed on the platform and are connected to an automobile air conditioning system through male and female butt joints. The automobile air conditioning system has the advantagesof being diversified in f