Dash Lights coming on and off

[blue thunder]

I'm having the same issue as Idaho biker girl a few posts back. Two nights ago i got in my car to go home and noticed the illumination light on the dash seemed weaker than usual. I drove home with no problem. Today on the way to work the dash lights came on and stayed intermittedly. I tried a test someone said to try. I started the car and then disconnected the negative battery cable and the engine stalled immediately. I was told this means the alternator is bad. Then I drove home tonight with the dash lights coming on and off the whole way. I then got my multimeter and checked the voltage and it read around 12 amps non-running which means the battery is fully charged right? Could my alternator be flaking out and still be charging my battery? I have one ordered for thurs. although I haven't paid yet. Any advice or experience appreciated. Thanks.


Mike