Description - Compass
All overhead consoles include compass information. While in the compass/temperature mode, the compass will display the direction in which the vehicle is pointed using the eight major compass headings (Examples: north is N, northeast is NE). The self-calibrating compass unit requires no adjusting in normal use. The only calibration that may be necessary is to drive the vehicle in three complete circles at 5 to 8 kilometers-per-hour (3 to 5 miles-per-hour), on level ground, for a minimum of forty-eight seconds. This will reorient the compass unit to its vehicle.
The compass unit will also compensate for magnetism the vehicle may acquire during normal use. However, avoid placing anything magnetic directly on the roof of the vehicle. Magnetic mounts for an antenna, a repair order hat, or a funeral procession flag can exceed the compensating ability of the compass unit if placed on the roof panel. The use of magnetic tools on the fasteners that hold the overhead console assembly to the roof header can also affect compass operation. If the compass operation is erratic and roof magnetization is suspected (Refer to ELECTRICAL/OVERHEAD CONSOLE - STANDARD PROCEDURE - COMPASS DEMAGNETIZING) .