I have a 2004 Navigator. In auto mode my right headlamp comes on, but the left one does not. In manual mode, both headlights come on every time. I have lived with just using the manual mode for years, but after having some work done after hitting a deer I have decided I will be keeping the truck for a while and am on a mission to track down a few of the weird issues I have. I am interested in hearing if anyone else has had this issue. Thank you