On our ’03 there is a switch located on the end of the HWH Central Control Box (MotherBoard) labeled Neutral Hold (photo attached). This box is on the aft bulkhead of the D3 bay and is closest to the door.
The switch will enable/disable coach movement whenever a slide room is out. I believe the “Room In” sensors must pass a signal that all rooms are fully in before you can move the coach. In our case, the previous owner had this switch set to Override and we have moved a foot or so once or twice to accommodate utilities.
I have returned it to the Normal position and tested the operation both ways. If a slide is out when setting to Normal, the Allison Control Pad will blink “6” when you press D(rive) and the coach will not move.
I did not find any previous reference to this. I hope it may help sometime…
