in trying to diagnose my non functioning air conditioner, I read where to jump 12 volts to the green wire on the compressor without the engine running to see if the clutch wil engage. I see three wires on the back side of the compressor, ( one black and two kind of green -- but one is striped) , but I don't think none of those is what I want ... I'm thinking one is ground, one for high pressure cutoff and one for low pressure cutoff). So,where is the green wire I want to jump?