Heater Vacuum Hose Configuration

["Greg R Wilson" <greg.wilson@centimark.com>]

I replaced the heat exchanger and blower motor on Saturday.  The project
went
fairly well, my first time for this one so it was slow.  One mistake I did
make
was not positively identifying where the vacuum tube that feeds through the
firewall
into the passenber compartment connects under the dash.  It is coming from
the fresh
air servo and the heater control valve.  I looked at Bentley's and I looked
and I looked, but there seemed to be some differences between my system and
how Bentley was diagraming it.  On mine there were five tubes coming from
the AC program box. Four of the tubes connected to the two different servos
- two and two at the base of the heater box.  The fifth went across the
dash
to the vacuum reservoir, I think.  I can't figure out where the white tube
coming from the firewall should connect.  I temporarily disconnected the
fourth (red) tube from one of the servos on the heater box, because Bentley
only showed three, and connected it to the white tube feeding through the
firewall.  However, Bentley's did say if the system is not correctly
installed that
all of the air would default to blowing through the defrosters, which is
the case with
my car.  I'm confused and any help will be mucho appreciado.

86 5000CS TQ 136K
Greg Wilson