Premium Motorhome: Can't lower the bed?

Check the ‘Load’ switch is on.
Check the fuse under the dinette seat.
Check the external locker at the rear on the passengers side. Look upwards to see if the wiring or connecter has disconnected when removing luggage etc.
If the battery is flat and you need to lower the bed, start the engine, turn on the load switch, lower bed, then turn the engine off.