Re: Still Brake-Stumped

[orin@netcom.com (Orin Eman)]

> 7)  Does ANYONE have an idea what the vacuum port built into 
> this brake switch might do?  It's designed to provide a vacuum seal 
> on the hose end when the pedal is not applied, and release its vacuum 
> seal when the pedal is depresed.  I've tried sucking on the hose, and 
> blowing into the hose - when I create pressure or vacuum with my 
> mouth, I can feel that the hose is not holding pressure. 

Cruise control.  The cruise control uses a vacuum actuator for the throttle
driven by its own pump.  Hitting the brakes releases the vacuum and therefore
the throttle is closed.  I think the switch is also for the cruise control
and signals that the controller should quit trying to maintain speed -
hence the normally closed contacts. 

There should be another switch for the brake lights.

Orin.