Buick LeSabre 1986-1999
Buick Park Avenue 1996-1999
Oldsmobile 88 1992-1999
Oldsmobile Delta 88 1986-1988
Oldsmobile LSS 1996-1999
Pontiac Bonneville 1987-1999
A grid type heating element is affixed to the rear window, and an instrument panel mounted switch with an integral indicator lamp is used to turn the system ON. When the system is turned ON, a small electric current passes through the grid and its circuit, generating heat to clear the window. All rear defogger systems operate on 12 volts.
Certain conditions, such as outside temperature, vehicle speed, atmospheric pressure and even the number of passengers inside the vehicle, affect the length of time required to remove fog from the glass.
The defogger is designed to turn OFF after approximately 10 minutes of operation. If the defogger is turned ON again, it will only operate for approximately 5 minutes. You can, however, turn the system OFF before the time is up by turning the defogger switch or ignition switch OFF.