Check the grounds on the curb side. Might be bad cable or just bad connection.
MH
----- Original Message ----- 
From: "birdshill123@yahoo.com" 
To: "WanderlodgeForum@yahoogroups.com" 
Sent: Friday, March 14, 2008 11:58 AM
Subject: [WanderlodgeForum] boiled batteries
Our 88 FC is equiped with 6/ 6 volt batteries. 4 on the drivers side 
and 2 on the passenger side. They are wired together and supply both 
coach and engine power. They are probably nearing the end of their life 
cycle as they are almost 6 years old. I always have to add a lot of 
water. My alternator is a Powerline. I think 200 amps. THis mother has 
an internal regulator. I spoke to Powerline and they told me to adjust 
the voltage to 14.2 with fully charged batteries. It was putting out 
15 volts. For some reason it starts out at just over 14 volts but then 
after driving awhile it goes back to 15 volts. Strangely the ammeter on 
the dash shows almost 75 amps at 14 volts?? I recently changed all my 
battery cables and cleaned all the ground connections as well as the 
shunts ( 3 I think) in the DS battery compartment. Another anomaly is 
that the DS batteries will be boiled almost dry and the other 2 take 
only a little water??? I dont want to buy new batteries until I have 
solved this problem. Any help appreciated.
Bruce
88 FC35