I just re-read your original post and at the very end you also said the generator would also not start.....do you mean won’t crank or just wont start? If it wont crank then there is usually a 100 Amp breaker in series with the gen starter motor and the coach batteries. Attaching another “generic” schematic for you. If that 100 amp breaker (or whatever your coach uses) is tripped it would affect the gen and any hydraulic levelling motor run also. Depending on what schematic Thor sent you it may (or may not) affect your chassis batteries from connecting to the converter too. On my ACE coach for example there is the latching relay between the converter and coach batteries, but there is also a 50 amp mini breaker in series with the converter and coach battery latching relay. You did say you could not hear any latch relay operate/release when use/store switch was operated....so I think discharged coach battery or bad coach latch relay.....or loose cabling connections. Failing all else trace the +12v cables from the coach batteries and see what devices they connect/pass through. It will be interesting to see what you find.
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