Originally Posted by RalphP
That would be called the A/C clutch coil then. Or ideally the entire clutch assembly.
If you do go to the boneyards, take a 12V battery (I take a "Jump Start" kit with me) and use that to test the coil. Then I'd get the entire clutch assembly.
The clutch coil is also called the field coil, since it generates a magnetic field to lock the pulley and shaft, but I could have been clearer, as I said.