[prairieschooner]

Todd, hopefully this isn't another big issue. Looks to me that the only switch important to this issue would be the Shoreline.
Here is how these work on our '82
1) Shoreline (Shore/Generator) - controls a Relay Panel. This is a Source Isolation Control that keeps your coach using power from only that source, you don't want your generator back-feeding into a land based power supply. When wanting power from the generator that switch should be in that position.
2) Battery Condition - tells the voltage for the battery bank that the switch is in that position. Momentary position simply to check voltage.
3) Battery Merge - causes the merge solenoid to connect the engine and house battery banks. I would bet that when up it uses the Engine batteries to supply the power to the solenoid and when down uses the Aux (house and gen) bank to supply the power to the solenoid. I only use this when I want one of the banks to supply power to the other..say when I want the House Batteries to be charged when going down the road or when getting ready to go dry camping. I don't use this all of the time because my Engine Batteries are 2 each size 8D Starting and my House Batteries are 4 each 6 Volts Deep Cycle that are wired in series to produce 12 Volts and I feel have different charging requirements.

Hope this was helpful