hello right i have a 04 peugeot 206gti 180 and i have just changed the cd player in it ,i connect my sub to the amplifier but then the blue wire from the amp u need to connect to the head unit i dont no were it needs to go ,because the other day my battery went dead and it was because the amp was left on ,but the blue wire connects to the head unit sum were so when the cars igntion off it switchs the amp off ,any help would be gratefull
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