The patient: 1990 Westie MV, US model

I had my air conditioning system evacuated (R-12 removed) and leak tested
today.  Very slight leakage in the system, but not enough to prevent me from
filling it with dye charged ES-12 and using it for the rest of the summer.
I am having some problems charging the system and I'd like to ask some
advice from the experts assembled.

It's currently quite cool here near Seattle.  The thermometer was reading
in the mid-sixties when I started work in the late afternoon and it's easily
down near fifty at the moment.  While attempting to charge the system, I
tried to turn on the system to run the compressor and suck the refrigerant
into the system.  The AC fans are running, but the compressor is not kicking
on.  Anyone think that the cool temps may be keeping the compressor from
running?  There is both an outside temp sensor and an evaporator temp
sensor, either of which may be reading too cold for the compressor to
kick on (the external temp sensor isn't supposed to block this unless it's
a lot colder than this, though).

Is there any way to force the compressor relay to kick on?  Anyone have
any recommendations as to which of the wires on the compressor to check
to see if I'm getting current to the compressor (this would at least
eliminate the possibility of the compressor being seized).

Anyone have any reputable wiring diagrams for the AC system?  The Bentley
doesn't cover the AC system on the wiring diagrams (at least not that I
can find).  Having a wiring diagram may help me figure out how to
troubleshoot this.

Thanks in advance.  Cheers.
Rob

              It's never too late to have a happy childhood.
                    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
                     Rob Scott, mailto:rob@unixguy.com
        Langley, Washington on Whidbey Island (a suburb with a moat)