What features exist with this radio?... CD player, AM/FM w/cassette? When you write 'no music,' do you mean none of the features are working AT ALL? You said you've verified power at the radio. Did you verify this because the visual display comes on (radio station display, CD track, etc)? Does this image/pic look like your radio? If so, there are TWO power inputs to it.
Yellow wire & Red wire (Y=pin 7, R= pin 16). Pin 16 is always HOT (ON), and pin 7 is ONLY HOT when the ignition key is in Accessory or Run position. You also have a connection/circuit to the amplifier - pin 12 (white wire with orange stripe) to pin 8 of M63-2.
Hope this helps. Once you've verified you have good connections (power & grounds -- and no shorts to ground), I'd say the audio head (radio) is defective.
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