How should we deal with the work of car spray motor in the car?

Fault phenomenon: a 2013 year production of the Teng 1.8151 car, mileage of 38 thousand km. The user reflected that the spray motor of the vehicle was not working.

Fault analysis: after receiving the car, the maintenance personnel first test the vehicle. When entering the automobile body control unit to perform the self-diagnostic test function, it is found that the automobile sprinkler motor does not work, which belongs to the dominant function deficiency fault. With the guide function inquiry, read the value of the towering, wiper switch function is normal, can normally send a request for water, then the fault should be in the executive circuit part. First of all, check the fuse SC42 to protect the sprinkler motor. The situation is normal. Unplug the fuse and turn on the ignition switch to measure the voltage of the fuse.