Have any of you ran into this?

[Jon]

While working on the steep on my 78 Wanderlodge, I spied a small
electrical wire leading under the frount edge of the steps on the
bottom. I pulled on this wire to see where it went and out pop an
Electrical heater strip cord. I don't know if this was a factory item
and don't even know if it works but it was interesting to see this as
it shows how the people at Blue bird would go that extra mile. I guess
it was used to keep ice from forming on the tread of the entrance door.
Jon