1996 Oldsmobile 88 Owner's Manual - Page 105
1996 Oldsmobile 88 Manual
Page 105 highlights
Compass Variance Variance isthe difference between magnetic north and geographic north.In some areas, the difference between the twocan be great enough to cause compass false readings. If this happens, follow these instructions to se the variance for your particular location: 1. Find your location on the zone map. Note your zone number. 2. Hold in the Cal switch (bottomof the mirror housing) for five seconds until the current zone entry number appears in the display. hold in the Cal To switch, insert a paper into the small hole on the clip bottom of the mirror housing. 3. Repeatedly press the Cal switch until the number for the new zone entry is displayed. Once the desired zone number displayed, stop is pressing the Cal switch and the display will show compass direction within a few seconds. 2-49