So, I spent an hour or so at my RV trying to troubleshoot this problem. To summarize what post #1 said, the generator wont crank using either the on generator switch or the coach switches and there is power being delivered from the 100A breaker at the batteries.
The first thing I did was check for incoming voltage at the big lug on the starting solenoid- yes. Then I jumpered the two big lugs on the solenoid and the engine cranked. Then I jumpered from the big +12V lug to the far small lug on the solenoid and it cranked.
So, the starter and solenoid valve seem ok.
All of this seems to point to a 5A fuse protecting the starting circuit being blown, but... I am not sure there is such a fuse. The service manual I have goes through Spec G but mine is Spec R. Spec G has a fuse right over the on generator start/stop switch, but there isn't one on my Spec R and a thorough search didn't find one.
So does anyone have a Spec R service manual they could share-
dmfeelingroovy@gmail.com or any ideas?
David