Mercury 1996 Sable Manual page 341

The Lights
It is a good idea to check the operation of the
following lights frequently:
headlamps
tail lamps
brakelamps
high-mount brakelamp
hazard flasher
turn signals
side markers
license plate lamp
The alignment of your headlamps should be
checked if:
oncoming motorists frequently signal you to
turn off your vehicle's high beams when you
do not have the high beams on
the headlamps do not seem to give you
enough light to see clearly at night
the headlamps are not aligned so that they
point slightly down and to the right.
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