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R32 AC Compressor Electrical Question

DualQuadDave

By DualQuadDave,
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DualQuadDave

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Hi all, I am working on an R32 GTR and have run into an issue with the AC.  When I got the car, it had most of the AC components, but not functional.  I had a new clutch put on the compressor and checked the diagnostics on the dash and all seem good.  When I charged the system, it's not pumping.  Clutch is engaged and compressor spins fine, but not pumping at all.  At the rear of the compressor, there is a plug with a red wire and green wire.  Neither have power.  I think this is a high pressure bypass valve, but currently is not receiving power.  I want to know which wire is the power input and what voltage?  If someone can unplug their's and check, it would be appreciated!  Thanks!

DualQuadDave Rookie

DualQuadDave

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I have looked at the diagrams and they show the wires, but not the continuity.  I just need to know which has the power going in.  It's important that I know which is proper as if I run power the wrong way, I may or may not fry the switch.  

DualQuadDave Rookie

DualQuadDave

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Help me out with that, as it's certainly not clear.  In most wiring diagrams, the continuity will have an arrow on the circuit showing flow of power.  There is nothing on the standard Nissan diagrams that I can see.  It shows ground, but it's a shared ground and not clear.

GTSBoy Grand Master

GTSBoy

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The wires literally START at the 12v rail and run to the earth rail. I have NEVER seen arrows on an automotive wiring diagram. This isn't kindergarten.

Just follow each wire back from the plug (on the diagram). One will go earthwise and the other will go to a power source.

DualQuadDave Rookie

DualQuadDave

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4 hours ago, GTSBoy said:

The wires literally START at the 12v rail and run to the earth rail. I have NEVER seen arrows on an automotive wiring diagram. This isn't kindergarten.

Just follow each wire back from the plug (on the diagram). One will go earthwise and the other will go to a power source.

LOL, thanks for the help.  I'll just figure it out myself.  You sure you aren't in South Florida with that attitude?

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