A DC Power Conundrum

[bluebirdfitz]

My Dometic refrigerator on our 78FC 31 is currently getting its DC power from
the genset
battery. I am not really sure why, but I am trying to shift it to drawing on
the house banks
instead. There is a solenoid on the inside right of the genset tray. I found a
hot lead on
the solenoid post, but when I hook up the terminal that was on the genset
battery post to
the solenoid post the fridge won't turn on. Is there a difference in the power
supply that I
don't know about (and I'll admit, I don't know much!). Is there a better way to
access the
DC on the house banks?

Thanks for any help.

John Fitz
78 FC31
Maynard MA