I own a 98 GT. The dash lights and HVAC lights have stopped illuminating. The headlights and tails work. I had this problem months ago and after a week or so it started working properly again. I can switch the lights to the on position with the car off and the headlights work but, still no dash illumination. The overhead lights work with the dimmer switch torned to the right. When I switch the light switch from off to the park light position on, the dimmer will work on my radio momentairley(sp) then it will return to full illumination. There is an aftermarket stereo installed but it has been in the car. I have checked the fuses and they are good. What should I do next?