As of right now my burb has 142,000 miles and needs a rebuilt abs module, a/c compressor and now something else. I replaced the alternator and battery February 2011. The burb starts fine and everything but I've noticed that my voltage fluctuates when idling, sometimes when coasting, shifting from drive to park my headlights dim, and rolling down the windows. Is it a bad alternator or ground cable somewhere?

 

If it isn't a cable issue, alternator.