What kind of response is this, David?  I'm not mixing freon and power
steering fluids.  The switch on the P/S senses a load and sends a signal to
a valve which opens and bleds in more air to the FI system.  The  AC
compressor could use the same valve.  It would send a 12V current to the
same valve  when the compressor kicks in and do the same thing.  I don't
know off hand if both switches were wired the same 12V, open or closed to
ground...  You would have to look in the Bentley.
My A/C is not working right now so I don't know if this is a problem for my
van.

                                                        Jay