How to connect the lamp, if 4 wires, and the lamp 2?

Denis asks:
Hello. I purchased a LED ceiling lamp. When I dismantled the old chandelier, I saw that 4 wires were coming out of the ceiling, and my new lamp had only 2 entrances. It would be 3, I would isolate the “earth” and connect the remaining 2 to the lamp, as I did in another room, and here 4 wires. Please tell me how to connect the lamp.
The answer to the question:
Hello! And how many keys were there in the switch? It seems that the chandelier was controlled by a two-gang switch. How many of the 4 wires have a phase? Take a multimeter and see where there is voltage, connect the phase and zero to the lamp.
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