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Message: <blockquote data-quote="TravisM" data-source="post: 1671229" data-attributes="member: 242057">I think Kaezoo nailed it. The head unit has two power wires coming in, the yellow wire is constant, so the radio can save your presets when the car is off, and the red one is switched, so the radio knows when to turn itself on and off. Sounds like the head unit's getting "switched" power where it expects constant.I don't think its going to be a blown fuse though, because if that constant wire was hooked up correctly, but blew a fuse, the radio wouldn't come on at all using only its red wire "switched" input.  If the radio comes on when the key is on, and off when the key is off, then your getting power from both inputs, red and yellow, they're just hooked up backwards.</blockquote>