Explain what the purpose of the diode is in this circuit?


+12v __________[_fuse_]_____.___>
........................................... |
........................................... _|_ power rest of car stereo
........................................... /_\ <------- diode
-0v _______________________ |___>

purpose of diode in (badly drawn) circuit? (ignore full stops please)

detailed answers please. thank you

+12v __________[_fuse_]_____.___> ............................................... | ............................................. _|_ power rest of car stereo ........................................... ...


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