I had a concern on my FR3 with the stairs hitting objects like the curb outside my home. While my stairs are designed to stop when resistance is met, I wanted to have control myself.
Most stairs will extend when the engine is off and the screen door is opened and the coaches are delivered this way because of the 'walking out and not realizing' comment made earlier. But I still wanted this feature.
On mine, the magnet switch activated by the magnet on the door is closed with the door closed. So, a switch that bypasses/shorts the magnet switch will make the coach think the door is closed and retract the stairs. The factory lockout extended switch needs to be in the off position. For a slight margin of safety and not explaining my whole stair setup, I have two switches (serial) that need to be in the correct position to force the stairs in such that if anyone hits one of the switches while standing on the stairs, they will not have the stairs disappear.
When concerned that the stairs might hit something, I flip one of the switches and stand by on the other while opening the door to retract the stairs if necessary.
2015 FR3 30DS
2010 Ford Escape Toad