2004 Cadillac Deville Radio Wiring Diagram. The symptom is that my climate control display only shows led's intermittantly. I replave my cadillac 04 deville radio with a o4 cadillac deville navagation system it does work but all i want to know is what r the extra plug hold for athe only thing i plug in was one plug ans the radio antenna ,there r still 2 plug holes left what r.

Car stereo wiring diagrams car radio wiring car radio wiring colors car radio wire car radio connections wiring diagram car radio wire colours. If all of your fuses are good, your 1999 cadillac deville may have a factory amp that needs to be turned on by your after market radio. 2004 cadillac deville subwoofer wiring.