I recently purchased a 1988 Tioga 26F in like new condition with 32,000 miles on it.  I have two requests for assistance:

1) 12 volt electrical system does not work...

I cannot get the electrical system in the coach to work on the 12 volt battery power.  I purchased a new deep cycle battery and installed today and still cannot get the lights and other systems to work.  When I connect to 110 volt power all the lights and systems work, when I disconnect from the 110 volt power I get nothing.  Is there a switch somewhere that transfers power between the 110 volt system and the 12 volt system?  My instruction book says that the transfer panel should do this automatically.  I have looked everywhere for a switch and cannot find one.  The instruction books leave something to be desired in this regard.  I would like to use this unit before winter sets in but need to have all the electrical systems operational before any trip.  Any assistance would be appreciated.

2)  Wiring diagrams...

 I would like to locate a wiring diagram for the above unit.  This would be helpful for my current problem and helpful in the future if I have any additional problems or need to make some electrical changes.

Thank You

Dennis Sachs