1993 Pontiac Bonneville Owner's Manual - Page 115

Features & Controls Calibrating the Compass (CONT.) If CALIBRATE continues to flash after about seven circles, your compass isnot calibrated. You could be too close to a vehicle level. power line or large metal object, or 4. When CALIBRATE stops flashing, something magnetic in your vehicle (like your compass is calibrated to a CB antenna) could keepthe compass magnetic north. from calibrating. If CALIBRATE stops flashing before If you are uncertain about where you are 1%circles, the calibration may not be accurate. However, if you are certain the in the calibration sequence, or want to start over, simply push and release the calibration is accurate after the zone is MODE or SET button, or turn the set, then recalibration is not needed. Otherwise, repeat the calibration. If this ignition off and restart the engine. condition continues, move the vehicle to a new area and recalibrate. Setting the Zone 3. Drive slowly in a circle at about 5 mph (8 km/h). Try to keep your Setting the zone corrects for differences between magnetic and true north. You can set the zone in two ways: By selecting the zoneyou are located in or by pointing your vehicle north and telling the compass the direction of north. Perform only oneof the two methods (A or B) each time you change zones. The last zone selection is remembered. ...114