On my car the ECM does not control the switching of the A/C but only monitors it to increase the idle speed when the A/C compressor is on.
The A/C is interlocked with the interior fan being on, temperature switch on the evaporator (stops icing) and a pressure switch near the gas drier.
I will search for the wiring for my car which should be similar to yours, and at least give you an idea what to look for.
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Sig image is 500X100 at 11.7 kb
Last edited by ron1004; 08-27-2006 at 02:10 AM.