FORD 2004 F-550 v.2 - Manual (Page 69)

Magnetic or metallic objects placed in or on the vehicle may also affect
compass accuracy. Adjustments may need to be made to the zone and
calibration of the compass.
Compass zone adjustment
1. Determine which magnetic zone
you are in for your geographic
location by referring to the zone
map.
2. Locate the trip computer on the
overhead console.
3. Turn ignition to the ON position.
4. Press and hold both trip
computer controls. After
approximately four seconds, the trip
computer will enter zone setting
mode. Zone setting mode is
indicated when the display lights the
“ZONE” indicator.
5. Release both controls.
Subsequent pressing of either control will increment the zone. Press the
control repeatedly until the correct zone setting for your geographic
location is displayed on the trip computer.
6. To exit the zone setting mode and save the displayed zone in memory,
release both controls for greater than five seconds.
Compass calibration adjustment
Perform this adjustment in an open area free from steel structures and
high voltage lines.
For optimum calibration, turn off all electrical accessories (heater/air
conditioning, wipers, etc.) and make sure all vehicle doors are shut.
1. Locate the trip computer located in the overhead console.
2. Start the vehicle.
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2004 F250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA English (fus)
Driver Controls
69