A somewhat common problem. Check for cracks, holes or some other way for water to get inside the lenses. That's what's happening. Somehow, water has gotten inside the lights. You'll need to figure out how the water's getting in, fix it and dry them out.
The fog light switch on the 98 Mystique is on the headlight switch. When you turn on the headlights, pull the switch towards and the fog lights should come on. Here is a link to the owners manual for the 98 Mystique http://www.analogstereo.com/pdf/om/mystique_owners_manual_1998.pdf
under the headlights On the inside of the markerlights
Fog lights are only accessable when headlights are on; once headlights are on, pull shaft/stalk out to turn on fog lights.
the light doesnt go through the fog
Low beam headlights and fog lights if the vehicle has fog lights.
use your low bean headlights
Just at sundown, or in fog and rain.
In fog you should use dipped headlights or front fog lights. Also you should use high intensity rear ( fog) lights.
No, the fog lights have a switch.No, the fog lights have a switch.
its on the left turn signal switch, at the end is the headlights, then one in is the fog lights, you twist it just like you would the headlights
on the right under where you turn headlights on,
You can but it makes matters worse. This would be the time to use your fog lights if you have them.