My car is a Citroen Shenshijia automatic transmission. What is the reason why the wiper doesn't start to swing automatically?

Did you turn off the wiper? If closed, it will run automatically. The possible reasons are as follows:

1 There may be a problem with the combination switch;

2 wiper relay problem;

3 there is a loose ground wire; (common phenomenon)

4 line problem.

There should be no problem and the maintenance cost is not high.