>>Randy,
>>
>>I would just be careful about running the compressor(accidentally) without it
>>being charged.  Most rely on the refrigerant for lubrication.  I learned this
>>the hard way on my scirroco.  Some cars run the compressor when the defroster
>>is switched on but I don't think the vanagons do.
>>
>>Garrick Chang

Disconnect the wires form the compressor, and the clutch won't engage.

Actually, it shouldn't engage under low pressure, due to the low pressure
cut off switch, but I wouldn't bet money on it in a pinch.  DIsconnected
wires have a tendency to block current flow, though.
tk