Pontiac 1999 Firebird - Manual (Page 108)

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Interior Lamps
Instrument Panel Brightness Control
The thumbwheel controls the brightness of your
instrument panel lights. Move the thumbwheel to
brighten or dim the lights. If you move the thumbwheel
all the way up, your courtesy lamps will come on.
Courtesy Lamps
When either door is opened, several interior lamps go
on. These lamps are courtesy lamps. They make it easier
for you to enter and leave your vehicle.
Courtesy lamps include two map lamps on the inside
rearview mirror and other lamps throughout the interior
of your vehicle.
To prevent battery rundown, your interior lamps will be
disabled about 10 minutes after the ignition is turned to
OFF. The 10
- minute timer will be restarted if you do
any of the following:
D Turn the ignition on.
D Open either door.
D Press any button on your remote keyless entry
transmitter (if equipped).
D Turn the interior lamp switch from off to on.
D Open the hatch.