Morning all. Didn't find this exact question in older threads:
neighbor asked me to look at his battery wiring
setup. Since I'm no expert in twelve volt electrics I think he must have been at the end of his rope
, but anyway:
His problem is that both his two battery
banks seem to drain about evenly whether his selection switch is set to 1, 2 or Both. Looking at his wiring
, I see he has his starter battery grounded not to a bus but to the negative terminal of one of the two house batteries
in Bank 2. I think that is why he's drawing current
from both regardless of the switch setting.
Is that how it works? If so, why does it do that? Is it a path of least resistance matter, or what? If I'm wrong about what's happening, what do you think may be?