Westend:
Thanks for the reply - Yes this is the correct schematic for my MH. There are no WH service centers nearby. Tiffin no longer takes appointments. You have to go to Red Bay where it is first come first served. You could sit in their campsite for several days before even being called.
Since 12V is present on one side of clutch relay coil (the one I can short across and get compressor to come on) all I need is a ground on the other side. The schematic shows the destination of the 12V from the interior unit to the right of "Light Switch" on right side of drawing. Don't know what that is and where it is.