Holiday Rambler dash switches

Thanks Bill

I played with the switch when the engine was idling at 725 RPM. When I momentarily pressed increase the idle speed went to 750; then pressed it again and it went to 775. Then decrease back down to 725. The cruise control will take it up to 1100 or 1300 imediatly. I think the dash switch is just used to set the correct idle speed.

BillofPA you have pretty well the same set up I do. How do you get it to change the idle speed.. Right now I can use the cruise to up the idle, but when I press the inc/dec nothing happens. I know this is a dumb question but if the cruise increases the idle why does it have both?

It's to change engine idle speed.

What happens when you push it with the engine running? My guess is that without a smart wheel it would be for increasing / decreasing RPMs.

The switch indicates that it is a momentary switch that "INCreases, or DECreases something.
Unless they mislabeled the switch, or someone replaced the original switch with this one, I would look for something that could be increased or decreased like may air pressure, heater temperature, etc.