Just getting ready for a planned trip to Big Bend TX. Went to start and it just cranked. Started to tear up the Ignition switch. But symptoms didn't really fit. Spent an hour picking thru forum. One captain suggested swapping out relays another talked about trouble with fuel system. Pulled the fuel line and sure enough no gas. The fuel relay had come loose from rubber holder and was hanging in the air up side down. Pulled the fan relay and tried it. Problem solved. Lesson learned is check obvious things like is it getting fuel, is there spark. Sometimes we want to jump on the ECU or make a problem when there is none (like me tearing up ignition switch needlessly). Thanks for guys for your accumulated knowledge in this forum.