I have a 93 Accord EX (with 241,000 miles!), and the A/C compressor will
not come on.  The interior A/C button lights up and the blower is turned
on.  The condenser fan does work, because it turns on when the engine gets
hot enough during idling to kick on both the condenser and radiator fans.
The A/C compressor also works, because I hooked up a power wire directly
from the battery to the compressor, and it will run.  I have checked all
the fuses, and the condenser fan relay is ok.  (switched it with power
window relay which is identical).  Any ideas on what could be wrong?  Is
there another switch that could be bad preventing power from being sent to
the compressor?  Any help or ideas would be appreciated.