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Did you remember to hit the battery disconnect solenoid switch so the battery was back in service again? That would be the first place to check.
Those solenoids are for disconencting the batteries when you aren't using the coach. IF they are in the "store" position then you won't have power. They click when they are switched. Rocker switch on the dash or on the panel near the side entry door or on the overhead by the door.
It will provide power to the keyswitch and that will allow the starter to turn over.
Not a toggle switch, but a rocker style switch that is spring loaded and pops back to the original position when you release it.
Just checking back in to see if you were able to track down the disconnect switch or do you still need some additional input from me here?