I have a 99 Cherokee Sport and all of a sudden the lights aren't coming on for me. Now I've replaced the switch and the fuses look fine. Replacing the switch worked for a couple of days. Its early in the morning when the lights seem to fail. (I thought perhaps it was because of the freezing temperature) So its a morning issue trying to get to work at four in the morning. Lights work fine during day time and night, but she just doesn't want to work in the morning. I have no idea what else to do, my manual is a little vague.