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Take picture of the switches in the center console please.
Common cause for the failure of anything with the switch on the doors is a wire breaking in the conduit between the door and body.
Diagnose by removing the rear seat back and spending some quality time with the electrical diagram and a test light or multimeter, or if you want you can start at the switch in the door (after checking fuses).
If you want to retain the original radio you can try a new faceplate, it is a seperate part. Is the faceplate really cracked or does it look more like this "*****" or "= = = ="?
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