I have a 95 Bonneville SE
The air conditioner will not kick on until the car goes above 3000rpms then its nice and cool. Most times it will stay on even if the engine slows but sometimes it will go back out until the rpms go back up. I have had the system tested and been told it has plenty of freon.

Now I am looking at the high/low pressure switches. Does anyone have a wiring diagram for the A/C system. I am not near my service manual and could use the information.

Thanks,
Jay

Got home last night and found my manual. Just in case anyone needs these.

The first thing to check are to see if the fans are working and that the engine isn't running hot.
Next I'd be sure the condenser doesn't have debris clogged fins.
In addition to checking the high and low pressure cut off switches, I'd be sure that the belt isn't slipping and the clutch isn't seizing up.