1993 Cadillac DeVille Owner's Manual - Page 159

Pwr (Power) The power (or PWR) button turnsyour system on and off unless you have a Bose system. If you do, rotate the upperknob to turn it on and off. Your vehiclehas Retained Accessory Power (RAP). When you stop your vehicle and turn the ignition key to "Off", you can still use your radio. The electrical power to the radio not shut off until you open a door will or 10 minutes has passed. If you want this power for another 10 minutes, just turn thekey to "Run"and then back to "Off". The UpperKnob The upper knob does these three things: 0 It controls the volume. 0 It lets you see what station you have. (When the radio is on, push the knob to display the station). 0 It tells you the time. (When the ignition is off, push the knob to display the time.) Unless you have a Bose system,behind the upper knob is a balance control. Itmoves the sound between the leftand right speakers. Bose systems are already balanced from left to right, so they don'tneed that control. The Lower h o b Turn the lower knob to choose radio stations. Push it to get AM or FM.