96 caravan still dying (electrical?)

I followed the advice of post on here and replaced the TPS on my 96 caravan after replacing altenator, distributor, battery. It ran fine for this past week, all sort trips under 30Km, Yesterday drove it into town (about 60 to 70Km)then ran rough and quit also wouldn't start again. The voltage at the battery at the time was 11.2 volts. Could there be a short or missing/broken ground from the altenator to the battery or a short anywhere that could cause the drop in voltage? :VHOT: