[rheavn]

I just got done dealing with a low voltage issue with my alternator that had just been rebuilt last December. I was only showing 9.9 volts at the center post on the battery isolator. My starting batteries were 8 years old so I replaced them even though they started the coach. Then I cleaned all the ground connections from the batteries to the alternator. I was still getting low voltage. Took the alternator back to the rebuilder. He said the positive brush looked brand new, but the negative brush was burnt down to 1/4". He said the only thing that would cause that brush to burn was either a shorted battery and/or dirty ground circuit. I'm guessing one of my starting batteries was shorted. Put the alternator back on & I am now getting 14.4 volts at the battery isolator.