The switch in the living room at home is broken, and it is still not easy to use the new one

If it is a dual control, there should be three wires for each switch, and it is necessary to look at the color of the lower line to say how to connect, and the principle of dual control is like this.

>A is the main live wire from the empty space, BC is the line between the two switches, D is the live wire of the lamp, and E is the neutral line.

Please use an electric pen to measure whether the connector connected to the yellow wire and the green wire together is the live wire, if so, it is A in the figure, and the two green wires are the BC between the switches.

Two controls, switches, to three lines, a public money (this is a line of fire), one to the living room light, one to the bathroom light, the beginning is not good, you turn him on, the public money is down, so, you install it back, both lights are not on, you go to change the switch, public money you still will not go back, so, the light is still not on, the general electrician to you when the installation, it is impossible to expose the copper, that is, after the installation, you can not see the copper, if there is a joint to use the electrical glue to wrap well, You obviously have a connector exposed there, which is not safe, besides, it is impossible to connect it like this, unlike the electrician's wiring method, maybe it is a public wire, use an electric pen to measure it, see if it is a live wire, if so, connect him to the public point of the switch, the switch box, generally only the live wire, no zero line, but for safety, you still have to be careful, if not, you can only find an electrician,

I buy the switch of the brand.

Is it a two-digit switch? There should be a minimum of three wires. Check whether one is broken, or elaborate.

It must be the wrong line, please help you answer the picture on the picture.

The order of the wire connection must not be wrong.