A/C help needed

[Bikeaudi@aol.com]

Almost have a/c sorted out on 87 4kcsq.  New reciever/dryer, new expansion 
valve,  new a/c high pressure switch.  Freezes at idle and low rpms.  Seems 
to cut off the compressor at 2500/3000 rpm.  Bentley shows "A/C Cut out 
switch."  Any clue as to physical location? What triggers it?  Specs? Shows 
Brown/Yellow & brown wiring.  Also how does one look up a/c in archives? 
Sorry to be so dumb if this was covered     a lot. Michael Conley
bikeaudi@aol.com
92 S-4, 86 4KCSQ, 874KCSQ