1994 Pontiac Bonneville Owner's Manual - Page 108

[MODE) normal and is true of compasses in general. If you put large metal objects like golf clubs in the trunk they could affect accuracy. If the accuracy is close, the compass will adapt to these objects over time. If you use an antenna with a magnetic base, it is best to mount it away from the center of the trunk near the rear window. 3. Release the "MODE" button. The heading display will start to rotate. 4. Drive the car in small circles. Don't drive faster than 10 mph. 5. Drive in circles until the "CALIBRATE' light goesout. It usually takes I to 5 circles. 6. Your compass should be calibrated. You will know this when the directior bars are on and the "CALIBRATE" light is off. COMPASS ACCURACY Your compass may show different headings around bridges, power lines, large metal objects, and steep hills. This i The rear defog system can affect Head-Up Display accuracy, and the compass corrects for the rear defog. However, if the rear defog is (OPTION) turned on while making sharp turns, the If you have the optional Head-Up Display accuracy may be off. When you turn the (HUD), you can see the speedometer rear defog off again, the accuracy returns reading, in English or metric units, to normal. displayed "through" the windshield. The Do not turn on the rear defog if you are HUD also shows: trying to calibrate. The system will not 0 Turn Signal Indicator Lights. allow the calibration. You will hear the chime, and "CALIBRATE' will flash for 0 A High Beam Indicator Symbol. a few seconds. 0 A "CHECK GAGES" message. (For low oil pressure, high coolant Be aware that metal objects are temperature, low oil level and low fuel.) sometimes buried in the ground. They can affect accuracy and you may not know 0 A Low Fuel Warning Symbol. they are there. As an example, many concrete roads have metal reinforcements HUD shows these lights when they are lit 0 I the instrument panel. 1 inside. 107 ...