Ive had three lights going on and off intermittently the last few days. The Battery light, the brake light and the Parking brake light all seem to light up at the same time. Actually the little arrow light beside the empty side of the fuel gauge was also lit up)

The last two days they seemed to be getting dimmer and the headlights were dim too. Today they stayed on for the whole time the car was running (30-40min) and on the second trip home when the ignition was turned off, it wouldn't start again.

We had to get a boost and then it took off once again just to get home. Now its sitting in the driveway unable to start.

I'm suspecting the alternator. I have a good very large newer battery so i doubt its that.

How complicated is it to rebuild an alternator? From the little I read It seems like it may only be replacing the brushes and the regulator? I'm not sure what part the regulator plays or where its located though.

Is there a way to test with a meter how the alternator is performing?
Thanks for any help... I guess I know what Ill be doing for my day off.....