Hello! I'm Rixster...
I'm going to see if I can help you out here.
I would be looking at a possible faulty Headlamp Switch which is mounted on your steering column. This switch work your illuminations and turn signals.
This switch can be replaced without replacing the complete combination switch.
There are a few tests you can perform to confirm this but it would involve a wiring diagram, a test light and the working knowledge of wiring schematics. I also recommend inspection of the rheostat for your dash lights. This is the controller for how bright the instrument cluster lights are.
I would recommend purchasing this switch from the dealer or OE parts supplier to be sure you have the most updated/current design switch.
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Have you checked the bulbs to be sure they are okay?
This may sound like a "dumb" question but I've had that happen to me before.
Here's a diagram of the lighting system. Also... Take a look at that Interior Lighting Module...
I do hope this helps you out...
If So Bonuses are gladly accepted.