The switch on the actual door SuperD referred to is on the screen door frame. It's a tiny old fashion burglar alarm type reed switch. And as he mentioned, there is a matching little magnet that is glued to the screen door. If either of those 2 items are damaged or missing the RV can't tell if the door is open or closed.
The ignition being on will override the step (in/out) rocker switch and pull the step up when the door closes. That way you cant drive off with the step down.
__________________
ComputerChips
|