[encantotom]

mark,

this is your manual transfer switch.

those are electrical controlled contactors.

one of the cables (4 conductor) is coming in from shore, another from genny and the last goes to your main power panel.

so one of two things is happening.

1. the contactor is not closing on one of them making the power not come through. from a bad contactor
2. the switch you have up front in the coach to switch between shore and genny is not working from the switch to the box you show.

that is my two cents worth, i will email you my phone number you can call me and i can walk you through checking it

most of those contactors there is a way to manually push it closed.

tom