System Operation: Compass
WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The GPS antenna integral to the GPSM, is used to acquire the compass heading. The compass heading is sent over the CAN to be displayed on the centerstack infotainment display.