C 3500 Truck 2WD V8-6.6L DSL Turbo VIN 1 (2002)
Compass: Description and Operation
The mirror uses two magnetic field sensors for compass direction. One sensor is for north and south; the other is for east and west. The mirror supplies a
signal and low reference to each sensor. As the vehicle travels with or against the earth's magnetic pull, there will be a change in voltage on one or both
sensors. As a result of the change in voltage, the mirror changes the heading on the compass display.
