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I have a 2007 Winnebago Tour 40FD on a Freighliner Chassis. I am experiencing a problem with the air bags not filling back up for travel mode after retracting the the jacks (store mode) and starting up the engine. The air pressure on the gauges is fine. It has done this the last 2 times out and I have to manually cycle the air valve on the front cross member by depressing one of the little pins on the block to fill the air backs per Freighliner instructions to get me going. The bags deflate normally when pushing the auto level button. However, they do not pressurize and restore to the travel mode when the engine is started and idled before travel. What are the logically things to check to trouble shoot this problem and determine whether it is the valve block, wiring, or the signal to shuttle the valve back to the travel mode. Also, where does this restore signal come from or is it a default condition. I am a Mechanical Engineer and have excellent troubleshooting skills, but usually need a starting point such as a schematic or a description that describes how the system is connected and what makes it work. I can speculate how the system is probably designed and built, but that does not always work when I do not have a starting point. I have tools and electrical test equipment to do trouble shooting as may be required. Any help is appreciated. Thank you in advance. Terry