1999 Cadillac DeVille Owner's Manual - Page 167

yellowblue With the digital cluster climate control panel, press the DEFOG button and adjust the fan speed by pressing the fan button up or down. If you use DEFROST, adjust the fan speed the same way. If you select DEFROST from AUTO, the system will control the fan speed. The temperature will also need to be adjusted to your comfort level. Press the blue button to decrease the temperature and the red button to increase the temperature. If your vehicle has a console climate control panel (which is standard with the analog cluster), press the MODE button to select DEFROST. Adjust the fan speed by pressing the fan button up or down. If you select DEFROST from AUTO, the system will control the fan speed. The temperature also needs to be adjusted by turning the TEMP/AUTO knob. Note that recirculation is not available in the defrost or defog modes. Rear Window Defogger The lines you see on the rear window warm the glass. Press this button to turn on the rear defogger. With it, the rear window and both outside rearview mirrors are heated. The system will automatically shut off after 10 minutes. If further defogging is desired, press the button again. Do not attach a temporary vehicle license, tape or decals across the defogger grid on the rear window. NOTICE: Don't use a razor blade or something else sharp on the inside of the rear window. If you do, you could cut or damage the warming grid or the integrated rear window antenna, and the repairs wouldn't be covered by your warranty. 3-11