have a 97 lumina.When I first start it in the morning it's fine.Turn it off 20 minutes later and then start it,and airbag light comes on,and stay's on,until the next morning.The clock,and other inside lights are also dimmer than what they should be,but when you turn key off, just before it hit's the position where you can pull key out everything gets bright.I've cleaned ALL wires,changed alternator,and replaced battery that died over this any help?