"Nope. When the rocker switch is in the middle position (it is 3-way), then the solenoid does not work at all. Rocker must be in MOM or DUAL to energize solenoid"
OK that explains it all. In DUAL it has to also close the solenoid which is NOT already on the run circuit like mine is.
It also explains why there is no Y in the solenoid's power line like I thought there must have to be.
BTW that DUAL would be handy for me, where mine is always in DUAL when the engine is running. I sometimes want to have no alternator charging on the way home so the AGMs will be low enough to accept a 20% charge rate, which they are supposed to get now and then. I need to install a switch in the line from the solenoid to house batts so I can turn that off before heading home.
