pcsandchips

im having a little problem wonder if any one else has had this or can offer any advice.. when i start my car and the key is in position 3. its all good if the key moves very slightly back towards position 2 the car still runs but stereo and heater all cut out. its happened a few times over speed bumps the key just turns a very small amount.
any advice would be great full

FIXED IT... IGNITION SWITCH.... WAS FAULTY...PART 1363940.....