I have just replaced all batteries. 8D for engine, and 6 GC2 6volts for coach. Also replaced inverter/charger with Freedom 2000 XC from Xantec. coach 12 volt lights will dim and furnaces stop working about every three days. Plugged in to 50 AMP shore power.
If I start engine before batteries get too low to crank, power comes back up to sufficient level to keep things running. The Freedom 2000 is indicating float at 13.2 - 13.5 volts.
My next suspect is the boost switch. it has right position, center position, and momentary left position. There are no labels, so I assumed that center is normal. House and Engine separated. Right is joined House and Engine battery banks, and left if momentary join.
If boost switch is in wrong position will that cause house battery drain even when charger is running?
I will keep poking around trying things, but advice from the wise men at this site will be appreciated.
'90 GV.
02 Suburban 2500HD 4wd.
The BOOST switch in the "wrong" position... By that I assume you mean the battery banks are connected? The boost switch position should
not affect the charging of the house batteries.
If the battery banks are connected, the inverter/charger would simply be charging
both battery banks instead of just the house batteries. When the battery charger indicates float at 13.2 - 13.5 volts, both battery banks would show that same voltage.
Having the battery banks connected would not cause the house batteries to discharge, as long as the battery charger is turned on and functioning properly.
It sounds to me like the battery charger is not making good connection to all of the house batteries. Have you tried cleaning and tightening all the cable connections?
My thoughts too. I will poke around the misc. relay board. Thanks for your thoughts.