I've got an electrical problem, the brake lights don't work when the pedal is pushed. The blinkers don't work unless you turn the hazard on, they don't flash but turns the brake light on the left side running lights on the right, I also unplugged the brake light switch and the blinkers work normal. Is this the multi-function-switch?

 

I'd say the MFS or the flasher relay.

 

the flasher works so does the MFS

 

From your description, a good guess would be the multi-function switch is faulty. How do you know it's good?