Rocky

There is no timer or clock.

On the AC, when it is turned on, there is an electrical connection
routed through a relay (and perhaps a sensor, I don't have the track
diagram handy) that tells the valve to allow air when the rpms fall
below a certain cut-off in the rpms to maintain the proper idle. That
same relay (I believe) also activates the radiator fan as well.

With the Power Steering, there is a sensor in the lines that detects
an increase in pressure when the steering is moved at/or near the
normal idle rpm that tells the valve to allow air.

Or it could be just magic..... :)
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
72 411 Station Wagon "Pug"
75 914 1.8 "Nancy"
Full Timing Since March 1999
oldvolkshome@gmail.com
http://www.oldvolkshome.com
***********************************
On Tue, Jul 26, 2011 at 7:22 PM, Rocket J Squirrel
<camping.elliott@gmail.com> wrote:
>
> But how does it know? Where's the clock -- timer -- in that module?
>
> -- RJS