[Richard]

So........

Later in the day, Adrian hotwired the travel solenoids. It didn't help. He confirmed 13V at the Packard connector to the solenoid. He then switched coils to eliminate a bad coil. No change.

He then simply bypassed the six pack by connecting the in and out lines from the Height Control Valve to the air bags. He is back in business with this patch.

I think there is a possible cause that we had not considered, and he will confirm when not in an RV park. He may have a ground problem with all the solenoids at the front six pack. It is easy to forget about grounding on any 12V system. It explains why he gets 13V at the solenoid but no solenoid action. He is checking the hot lead on the Packard connector with the positive probe and grounding the neg probe on the frame. Diagnostic step one will be to measure voltage at the Packard connector using both the hot and ground in the Packard. A bad ground could explain the flaky nature of his front leveling system behavior. It did not make any sense when he hotwired the travel solenoids that they did not work, until we consider a bad ground as a possiblity.

To be continued.