1993 Pontiac Bonneville Owner's Manual - Page 87

Features & Controls Rear Reading Lights These overhead lights and the interior courtesy lights will come on whenyou To reduce glare from lights behind you, open the doors. pull the lever toward you to the night position. To turn on the reading light when the door is closed, slide the switch up. Slide it down to turn offthe light. Inside Manual Day/Night Rearview Mirror Electrochromic DayINight Rearview Mirror This mirror automatically changes to reduce glare when set in theMIN or MAX positions. One photocell on the back of the mirror senses whenit is becoming dark outside. Another photocell is built into the mirror surface to sense headlights behind you. The mirror will darken gradually to reduce glare. This change may take a few moments.