So there I was sitting in work listening to the radio in the hut when I could hear another radio coming and going as if someone was turning up and down the volume of the radio any passed no remarks for awhile until out of the corner of my eye I noticed my car radio going on and off while the car was switched off and locked

So went out and unlocked the car radio stayed off locked the car radio would again turn on and off every couple of seconds also noticed that the airbag light would flash constant this has never happened before so would the battery be on the way out or is it some deeper problem