Coachman 2006 Mirada water pump question.

With main fuse panel fuse (10 amp) in place, switch...does not turn off pump (green light always on)...and if taps turned on then of course pump turns on. Even when connected to city water, pump can only be turned off normal demand mode when main panel fuse is pulled. When on city water pulling the fuse is the only way I can keep the pump from turning on. When on the road, I keep the fuse out and pump works fine, and I can turn the switch on and off. With fuse in, the light always stays on. Appreciate any help.

placeholder text for bug in Chrome