Ford Mustang Owner's Manual page 63

To turn on the parking lamps, license plate
lamps, tail lamps and marker lamps, move the
knob to the first position.
To turn on the headlamps, parking lamps,
license plate lamps, tail lamps and marker
lamps, move the knob to the second position.
For more information about how the high beams
work, see the high beam section later in this
chapter.
This chime sounds if the driver or any passenger
door is open when the parking lamps or
headlamps are on. The chime sounds until you
close the door, turn off the lamps or turn the
ignition to the ON position.
Lighting Up the Interior and Instrument
Panel
With the headlamp knob in the parking lamps
or headlamps position, you can brighten or dim
the lights on the instrument panel. To do this,
rotate the headlamp knob clockwise (to dim the
lights) or counterclockwise (to brighten the
lights). Rotate the knob fully counterclockwise to
operate the interior lights.
The knob controls the light on the instrument panel and
the interior light
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