Short in car radio - wiring stopped working

Serge asks:
Vaz 2114 closed the radio, the result does not burn the feet, the bortovik with the display unit died, the ignition switch is off, the fuse f3 changed, nothing burns, how to find the cause.
The answer to the question:
Hello! Can you try to see if the voltage to this line goes from the fuse box? To do this, you need to dismantle it and from the side of the connectors you need to find a wire, if it does not go away, then the bus burned out inside the fuse box. If leaves - look for where the wire burned out.

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