Sorting out 12v system on 85
My project RV is a 1985 Monitor class C. I'm working on the 12v coach system and hoping to get it sorted out. My coach battery drained dead multiple times over the winter, even when the RV was on shor...
Forum Discussion
That looks about right for a block diagram. There are some (generally minor) differences in circuit topology that aren't too terribly important--for example, the connection on the engine side between the battery, alternator, and isolator can be rearranged in a few ways, any of which would work fine provided the wires are heavy enough.
Sometimes the aux start solenoid and the isolator are the same gizmo with a somewhat more complicated control wire from the start switch. (Pressing it connects the solenoid control to a house +12V circuit; releasing it connects it to a switched circuit in the chassis, either switched with the ignition or something a little more complex to permit the chassis battery to get recharged before connecting the house battery.) Sometimes they are separate systems, as your diagram shows.
Sometimes the aux start solenoid and the isolator are the same gizmo with a somewhat more complicated control wire from the start switch. (Pressing it connects the solenoid control to a house +12V circuit; releasing it connects it to a switched circuit in the chassis, either switched with the ignition or something a little more complex to permit the chassis battery to get recharged before connecting the house battery.) Sometimes they are separate systems, as your diagram shows.
