1995 Honda Civic Press Brake pedal and front side lights co

Hi, when my cars lights are turned OFF, and i press my brakes the front lights (side lights) come on too..

And the stereo and the clock and dails all go dim until i release the brake pedal

When i turn ON my front lights all the interior lights go dim and everything is fine

its only when the front lights are turned OFF , that when i press my brakes its seemed like its acting like a dimmer

And with the keys out of car and depressing brake pedal it makes the Beep sound, which i normally get when i leave the lights on ...But lights are OFF and brake depressed it BEEPS

only thing i have done since its add a bass box and amp...i am thinking it could be something to do with the remote wire..Not sure

Any help please?

thanks