Ok, so I installed a brand new stereo into my truck. When I got it back the airbag light started flashing. I took it back and they ‘fixed’ the problem. I later had to take the stereo back out (a very simple procedure) to install and iPOD adapter. When I put it back in , the airbag light flashing continuously. What’s going on?

my answer is try to check it out first on auto repair shop dude