Cl radio problem
 

Hi, just bought a used 2002 CL 500. when you go to power up the radio it says no tape and then the screen goes blank. then it will come on for a sec again with no tape screen and go black again. Any suggestions on whether its a power issue or radio issue. I pulled it out and I have 2 live wires going in that dont seem to break connection. Also, does anyone know where I can get a relay/fuse map or chart. this car didnt have one where the spare is. Thanks,