Tell me about the electrician.

I don't know how you got "1 10V" in the picture.

Find the line of fire first, and make sure. Steps:

(1) Turn off the lights first, remove all bulbs, turn the switch to any position, and test the wiring screws on the lamp holder with an electric pen. During normal wiring, neither screw should have electricity. At this time, when you press the switch, there should be a live screw, which is the live wire inlet end, and the other end without electricity is the zero wire end;

(2) If there is electricity at one end of the screw at both ends of the lamp holder, the switch is connected to the zero line. At this time, it is very troublesome to violate the installation specifications of lighting fixtures, that is, it needs professionals to solve it, and it is also very troublesome, even a major rerouting project;

Check the switch wiring without installing the light bulb. Usually, one live wire is the live wire. If you press the other two wires, there will be a control wire (live wire) leading to the live or dead lamp.