When I turn my headlights on and press my brakes the brake lights don't work. When my headlights are off the brake lights work just fine. The middle brake light works but the left and right rear brake lights will not work or go off when I turn the headlights on. I change the bulds and checked all fuses.. Will someone give me a suggestion thanks

 

I have the exact same problem with the left brakelight.
Works fine when lights are off, with light on won't come on.
97Z.
Somebody please help.

 

Really need to know if someone else has fixed this problem