mystery switch

[Raymond smith]

on the right hand side of the driver just ahead of the brake release valve is a rocker switch that says open and close on it . please help what is it for .  our bus is a 1989  mci  102 c3

[buswarrior]

The MCI D3 had a square button that clicked in and out on the front edge of the driver's modesty panel that opened and closed the fresh air supply.

Is this a similar control on the "C" coach?

happy coaching!
buswarrior

[sledhead]

On my 1990 102c3 its a square switch when pushed in it opens a air valve in the front spare tire compartment for fresh air to driver                dave

[Raymond smith]

thanks for the info guys . were ontario busnuts too up here in Thunder Bay . Raymond