1998 Cadillac DeVille. No sound from a used cd/cassette player. All the displays work?

Question

The original cassete/radio works fine but the cd/casette/radio (from another 98 Cad) has no sound from the speakers.

Answer 1

1998 Cadillac Deville Stereo Wiring

Constant 12V+ Orange  

Switched 12V+ Yellow  

Ground Black  

Illumination Gray  

Dimmer Brown  

Antenna Trigger Pink  

Antenna Right Rear  

Front Speakers 5 1/4" Dash

Left Front (+) Tan  

Left Front (-) Gray  

Right Front (+) Light Green  

Right Front (-) Dark Green  

Rear Speakers 6" x 9" Rear Deck

Left Rear (+) Brown  

Left Rear (-) Yellow  

Right Rear (+) Dark Blue  

Right Rear (-) Light Blue  

with most luxury cars you have an external amp that powers the speakers, not the radio itself

you will need to rewire the speakers to the radio or send a "remote" wire to the factory installed amp to tell it to "turn on"