The mirror is set in zone eight upon leaving the factory.
It will be necessary to adjust the compass to
compensate for compass variance if you live outside
zone eight. Under certain circumstances, as during
a long distance cross-country trip, it will be necessary to
adjust for compass variance. Compass variance
is
the difference between earth’s magnetic north and true
geographic north.
If
not adjusted
to
account for
compass variance, your compass could give false
readings.
To adjust for compass variance,
do the following:
1.
Find your current location and variance zone
number on the following zone map.
2.
Press and hold
COMPASS
(or the
on/off
button for
mirrors equipped with OnStap controls) until a
zone number appears in the display.
3.
Once
a
zone number appears in the display,
press the
COMPASS
button (or the on/off button
for mirrors equipped with OnStap controls) quickly
display. Stop pressing the button and the mirror
will return to normal operation,
If
C
appears in
the compass window, the compass may need
calibration. See “Compass Calibration” explained
previously.
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2-37
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