I'm trying to understand how the bilge pump and float switch (H33C) were originally wired. Looking at the wiring diagram (from the manual) it seems there was no On-Off-Auto switch, but the float switch had an independent feed. My float switch needs to be replaced, and I was thinking of adding an On-Off-Auto switch, but with the present switch working the pump would only come on with the panel switch in the On position; the On-Off-Auto switch should allow pump operation no matter if the main panel is powered up or not.