2012 Fleetwood Discovery 42m, 8.3 Cummins. 47700 miles. Present location Granbury Texas heading south.
When I turn the ignition key switch to on, wait for the light bar to run the checks, than turn the ignition key to start the engine nothing happens. I have good dc voltage 12.7 at rest. The aux switch makes no difference. I've checked all house and chassis fuses. Also checked/cleaned battery terminals, disconnect terminals both house and engine tight. Relays checks are more difficult. Nothing looks burned or over heated. Starter and solenoid clean and tight.
Now the rest of the story. After doing all of the things above, trying to restart, frustrated i turned the ignition key to start without waiting for the light bar to clear, the engine starts right up! Seeking help.