My A/C Clutch never kicks in (at least I can't hear it - shouldn't it be very audible?)

I followed the Honda Service Manual, Section 22-12 through 22-21 and when I jumper Terminals 1 and 2 of the Compressor Clutch relay area (under the hood) I still don't hear anything and I don't notice the idle dropping.

Even IF your car is low on freon, how can you "force" the a/c clutch to kick in so it will pull in more freon when you do a recharge ?

Any ideas welcome!