RAM 1500 Truck 4WD V8-5.7L VIN D (2005)
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If the compass functions, but accuracy is suspect, it may be necessary to perform a variation adjustment. This procedure allows the
compass unit to accommodate variations in the earth's magnetic field strength, based on geographic location.
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If the compass reading has blanked out, and only "CAL" appears in the display, demagnetizing may be necessary to remove excessive
residual magnetic fields from the vehicle.