shore power

[df0226]

Im a neebie with a fc33 problem.
I turned the switch to shore power, plugged in the power cord, turned on the
breakers. All the 110 accessories work but it appears there is no converted
power (12 volt) to any of the 12 volt accessories, interior lights etc.
The voltmeter on the wall only reads 20? volts and the batteries go dead.
The generator was removed before I got the coach so I dont know what was
disconnected in the removal, but where should I go looking for the problem?
I am a certified mechanic from the 80's but I seem to be lost on where to begin
looking and the bluebird manual is sorely lacking on any information for
repairs.
Does anybody sell a repair manual or information for repairs on the
Wanderlodges?

dana fransen w/
BOB (the big ol bus)fc33
valley springs ca
40 miles east of stocton