park lights come on when brakes applied

I have a 95 Subaru Legacy LS and when i hit the brakes, the park lights come on. when the car is not running and i hit the brakes, the park lights, cluster lights, and the glove box light comes on(when it's open. glove box light doesn't work when brakes aren't applied). i believe it is a grounding issue, but i don't know where to begin. any help would be much appreciated.

Check the voltage of the alternator. When it is running it should be more than 13.5 volts.

Good luck,
Sam