A/C Config. question

[colin cohen]

I have an unusual A/C installation that is not covered in any of the Bentley
docs.  For one thing it has a Sanden Compressor.  But here is my question:
the high/low pressure switch is mounted on the dryer.  Neither of the
terminals are marked. The switch is a small 1" X 1" aluminum cylinder with a
pair of two spade connectors mounted on the top of the cylinder and the
entire cylinder screws into the top of the dryer.

Does anyone have a similar installation?  Any idea what could happen if I
switched the connectors?  At the moment the A/C only produces cold air when
in recirc mode.  I think it might be a wiring problem behind the dash, but
want to be sure that its not influenced by these unlabeled connectors?

Colin