1962 Cadillac Sedan Deville radio harness wiring diagram
 

Hello. I was wondering if anyone knows the color code wiring diagram for a 62 Cadillac sedan Deville? The 4 wire prong that comes off the radio has a black brown blue and green wires. Which one does what?

Thank you
https://cimg8.ibsrv.net/gimg/www.cad...f172c637e7.jpg
https://cimg5.ibsrv.net/gimg/www.cad...79cfa51751.jpg