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Discussion and questions related to the course Motorsport Wiring Fundamentals
how the power supply relay will switched off as it connected directly from the battery
You need to give more information on the background to that question.
I agree with Gord, we need more info. In the meantime, relays often have constant power fed to them, but are switched on by the coil input, so that constant power feed does not pass through the relay to without the coil circuit being turned on.