The light in the dash is on but not very bright. Is that how it should be if the alternator is bad? Also, the three idiot lights on the left side of the dash the battery, brake light & the can't remember the 3rd one right now. That's how it is when you get older??? They don't come on now when the ignition is on ready to start. I don't know if defective alternator would cause this condition or not. Or if I have a different problem.