1993 Oldsmobile Achieva Owner's Manual - Page 120
1993 Oldsmobile Achieva Manual
Page 120 highlights
Comfort Controls & Audio Systems Rear Window Defogger (OPTION) The rear window defogger uses a warming grid to remove fog from the rear window. Press the defogger switch. The indicator light will glow.If your vehicle is traveling under 45 mph (70 km/h), the rear window defogger will turn off automatically after about 10 minutes of use (and after about 5 minutes on each subsequent use). If your vehicle is traveling over 45 mph (70 km/h), the defogger will operate continuously. You can turn thedefogger off by turning off the ignitionor pressing the switch again. Do not attach a temporary vehicle license across the defogger grid on the rear window. 18 1 . . I Y Flow-Through vt tion System Don't usea razor bladeor else sharp on 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. Your Oldsmobile's flow-through ventilation system supplies outside air into the vehicle whenit is moving. Outside air will also enter the vehicle when the heateror the air conditioning fan is running.