You sure can. There's a vacuum switch which enables the AC compressor which is driven from the same vacuum "circuit" (the BLACK vacuum line) as turns on the vacuum switch for the blower. If the blower is working, the AC compressor should be able to run.

If you have the CD set you can find the wiring diagram. The following switches control the AC compressor:
1. Vacuum switch, mentioned above
2. Switch on the control panel, On/Off
3.ETR switch, that the switch on the evaporator box (behind the glove box liner) which turns off the AC compressor if the evaporator freezes over.
4. Low refigerant pressure switch.

If all the switches are OK then the AC compresor will run. At idle the air coming out of the center vents should be 50F or less. Use a supermarket food thermometer, don't guess at the temperature.

__________________
Steve S
Support Tech
UnwiredTools, LLC
www.unwiredtools.com

1982 380SLC
1994 E320TE
1998 E300DT