Hi all - this is a useful "forum" . Question plse re Navigation and Sat. signal fades out ; I purchased this in Maple Ridge - WestCoast Ford - BC . They failed to fix the issues ; weak signal from GPS etc . Is it the unit on the roof above Passenger ? Does snow//ice worsen the problem . Why does the Navigation suddenly rectify its self and then quit again . Jacobsen Ford in Salmon Arm , BC already entered the dash area etc and tried to fix . Anybody else had this 'on-and-off' pattern ? Thnxs . fothco . BC