2006 Honda Odyssey Electrical problem

2006 Honda Odyssey 6 cyl Front Wheel Drive 75000 miles

3rd (upper rear) brake light turns on when lights are on. Backup lights won't work with lights on. Radio console lights turn on when brake pedal is pressed (with out lights turned on). When lights are on, 3rd brake light turns off when brake pedal is pressed, and so do tail lights, but rear brake lights seem to work.

Thank you for your time.