1993 Pontiac Bonneville Owner's Manual - Page 123
1993 Pontiac Bonneville Manual
Page 123 highlights
Comfort Controls & Audio Systems Defogging Windows with Standard Climate Control(CONT:) Rear Window Defogger(OPTION) ~ The rear window defogger uses a warming grid to remove fog from the To defog the side windows, move the mode control to and the fan control rear window. Press the @ button and to HIGH. Aim the side vents toward the release it. A light will glow in the side windows. For increased air flow to switch while the defogger is working. The defogger will return to off the side vents, close the center vents. automatically after about 10 minutes of use. If you turn it on again, the defogger will operate for about five minutes only. You can also turn the defogger offby turning off the ignition or pressing the button again. Do not attach a temporary vehicle license across the defogger grid on the rear window. , g Don't use a razor blade or something else sharpon the inside of the rear window. If you do, you could cut or damage the warming grid, and the repairs wouldn't be covered by your warranty. . m a 122