4000 A/C Observations and questions

[colin cohen]

I started dismantling the dash of the Sport today and discovered the
following:
1) There is a neat thermostat, a rotatable dial rather like a volume control
of a radio. It resides on a bracket to the right of the evaporator and
behind the ECU.
2) The evaporator tray has a small rubber hose that protrudes about 3 inches
into a rubber grommet in the fire wall.  I don't think it is connected to a
down hose or a L link that would take the condensation below the car.  I
assume the stuff just runs out the hose and down the firewall.  Anyone ever
seen this set up before?
3) There is a silver disc attached to one of the A/C pipes running into the
evaporator. I assume this is the Expansion valve.  It has a ground wire
attached to it?
4) Where is the Ambient temp switch which is on Tracks 204/5 of the Bentley?
I could not find anything like this kind of device inside the car or under
the hood?
5) Where is the A/C Idle Stab. Valve on track 209 of the Bentley?  And for
that matter, are both the A/C Cut Out Sw. and the A/C Compressor clutch the
same electrical unit on the Compressor.

BTW I am assuming a 1985 Urq/Coupe A/C installation here?

Colin