When I bought my '98 XJ, my fog lights did not work. I did not bother looking into the problem since I had never experienced the advantage that fog lights give you (Never had fog lights before). I also just thought the bulbs were burnt out. Well, a couple years later I removed the switch from the dash and proceded to take it apart. It turned out that my switch was fried inside. Literally melted like hot cheese. I didn't have money for another one, so I just left the dash the way it was, with an empty slot for the switch. Just recently(a couple days ago) I looked at the wiring diagram for my jeep and noticed that all the current that runs to the fog lights goes through the switch. I don't like that at all. I would rather have a light-duty switch that controls a relay, so that I don't have all that amperage going through the switch or the wire harness for that matter. If I remember correctly, I called a Jeep dealership and asked about my problem. They said I need a new wire harness. I was told it would be about $110. I'm not about to spend that much just so I can tear apart my dash and install a frustrating harness. Soon I am going to find a suitable replacement switch instead of buying a $45 stock replacement.

So, remove your switch and check that it is in good condition. I actually took mine completely apart; removed the outer housing so I could see the innards. There was little indication(visual) of failure from the outside.

As far as your airbag light, I had a similar problem. My airbag light along with a couple other lights were going on and staying on. Then my guages would stop working all of a sudden. When I hit the bottom of the dash, they would spring back to life(for a short while). I removed my bezel, removed the instrument cluster, and visually inspected it. All seemed well, so I reinstalled it. From taking it apart I realized that the cluster has a male "socket" that plugs into a female receiver on the dash. My problem ended up being a poorly connected cluster. When I reinstalled it, I made sure it was fully and correctly seated. That solved the problem, and it hasn't been back for more than 12 months.

Good luck . I may repost with photos of my switch, if I can find it.

-Patrick