Nissan Repair Questions? Ask a Mechanic for Answers ASAP
The most common reason for no compressor clutch is low system pressure, low gas.
Can you get the system pressure checked?
The high/low pressure switch has disabled the compressor.
Ok, I'm glad we are on the same level.
It seems the compressor is permanently grounded one side, and 12v switched, unlike most that are ground switched.
Can you measure the clutch coil resistance, must be open circuit.
The clutch is open or short circuit if it won't engage when you supply 12v and ground.
If there is any form of spark as you make the last connection, there is a "circuit" but if the windings are partial short circuit, then it doesn't create enough electromagnetism to operate the clutch.
If there is no spark at all, the coil must be open circuit.
I have seen compressors overheat and burnt out the clutch coil.
So before you replace the clutch coil, ensure the compressor is not seizing by turning it by hand to feel it's operation.
I'd say the clutch coil has gone partial short and blown a fuse or relay contact.
I hope my advice has been of assistance to you.
How have you gone with your A/C problem?