Behavior of the compass in the EVIC in my new BigHorn has been mysteriously intermittant from the beginning. Dealer said it needed to be "calibrated" by driving around in circles. Tried that and seemed to work for awhile, but this morning not working again, just displaying "--". But in a moment of inspiration I pressed the button to turn on the radio/nav, and immediately the correct direction popped up in the EVIC. Lightbulb moment! You'd think they would mention this somewhere, and if they did I missed it, but apparently the EVIC gets its direction data from the nav system and if it's turned off, there's no data. So haha on me, been nothing wrong with it all along...