[Richard and Rhonda]

The plot thickens.

So it's definitely not a foot rest. Have you traced the air lines? Is the pedal a match for the real brake pedal? or does it look like something added after the original build?

Does the brake pedal actuate the same type of device that the real brake pedal does? Do the brake lights come on when you press this pedal?

I wonder out loud if any of the previous owners towed a large trailer with the coach. Is there any sort of air connection around the hitch for hooking up air brakes to a towed trailer or car? I am thinking it could be an independent air brake for the towed trailer or car.

Have you asked Newell if they have any knowledge of this critter.

When you say nothing happens, I assume you mean no braking occurs when you press the pedal. Does anything change if you press the pedal while you are also pressing the real brake pedal?

When you press this mystery pedal do the air guages move like they do when you press the real brake pedal?

Where are you geographically? Inquiring minds want to see this thing :-)