Rear Break Lights & Indicator Light Flash Together?

Hi

Can someone plz help me? I have clio 2002 1.5deseil, When i turn the head lights on and use left or right indicator, All of my rear lights start flashing, Even when in day time when i press break padel my indicator and break light start flshing together and my fog warning light also start flshing inside on my desh board, I have checked all the bulbs infacet i have changed all the bulbs but it's still the same.

I also have notice that when i drive and use left or right indicator my car slows down.


K . R