Buick PARKAVENUE 1995 Owner's Manual Page 105

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Compass
Variance
Variance is the difference between magnetic north and
geographic north. In some areas the difference between
the two can be great enough to cause false compass
readings. If this happens, follow these instructions to set
the variance for your particular location:
1.
2.
3.
Find your location on
the
zone map. Note your zone
number.
Hold in the
CAL
switch (on the bottom of the mirror
housing) for five seconds until the current zone entry
number appears on the display.
To
hold
in
the
CAL
switch, insert
a
paper clip into the small
hole
on the
bottom of the mirror housing.
Repeatedly press the
CAL
switch until
the
number
for
the
new zone entry
is
displayed.
Once the desired zone number is displayed, stop
pressing
the
CAL switch and the display will show
compass direction within
a
few seconds.
2-47
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