So my 03 hyundai sonata has some electrical problems that seem related. When the headlights are on, the brake lights stay lite/on, the dash clock dims when brakes are pressed, and the cruise control will not work. When the head lights are off everything is normal. Any help?

 

Replaced the stoplight switch, and no help. Seems to work fine with out the headlights on, when headlamps on brake lights are stuck on....

 

Turns out autozone sold me the wrong brake light bulbs two weeks ago... the wrong ones fit but had only one contact/terminal, when the right ones had two. FIXED.