The magnetic clutch is toast on the AC compressor.
I bought this car with a hole in the block. Rod punched through near the compressor and oil scorched the clutch wires, shorted them and fried it. Connecting 12V directly to the clutch has no effect whatsoever.
I believe the compressor is good, but would like a way to test it before I go through the hell of trying to replace an AC clutch with the compressor on the car...said car being an MR2 on jackstands. 
Welder
shim and hammer
The pressure plate is recessed into the pulley. I can't figure out how to shim it. 
How much magnetic force would it take to lock it up?
did you run a ground wire to the plug?
novaderrik wrote: did you run a ground wire to the plug?
+1 The wires being fried shouldn't have done anything to the stator. Make sure you have a direct path coming AND going. Otherwise, it leads me to believe the clutch was toast prior to the "incident".
For what you want, maybe epoxy or JB Weld. Of course, that might make it difficult/impossible to disassemble and replace the clutch.
Maybe some hot melt glue. To lock: Apply hot melt, clamp until cool, test. To unlock: Heat with propane torch, pry apart with screwdriver until cool.
YMMV
novaderrik wrote: did you run a ground wire to the plug?
I ran 12V directly to the + and ground leads on the clutch and nothing happens. The car sat for 6 months or so. I wonder if it could just be stuck? When in doubt, PB Blaster + hammer can't hurt.
FWIW, the compressor was new (rebuilt) in 2007, according to the sticker on it.
There's really nothing to get stuck, the stator coil energizes and the resulting magnetic field attracts the steel rotor and pressure plate together. Did you get sparks when you connected it? If not, then no current flow, no magnetic field, no clutch action.
In reply to erohslc:
nothing...dead.
I hate AC work. I've never had any long term success repairing one.
I decided to troubleshoot on upstream of the compressor and found that the lead wire from the harness isn't energizing either, so even if the clutch wasn't fried it wouldn't be energized.
I tried jumping the pressure switch, and the AC compressor lead still wasn't energized.
Check the AC fuse -> good.
Sounds like its time to actually read the service manual. 
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