'96 SS Bose Radio Question

So when I turn my lights on (either parking/fog or headlights) the light on the stock Bose head unit goes off. I can only see what radio station I'm on when the head/fog lights are off. What's up with this? Any ideas what could be causing this?

Thanks,

-John

It must involve the dimmer somehow. The display is supposed to dim when you turn on your lights but I don't know why it would be going all the way out. Maybe it isn't wired right or something.(the dim wire)