No power to A/C compressor clutch

[blazerbones]

Hey all.

My A/C compressor clutch is not seeing 12V... ever. I'm wondering when it should be seeing 12V. I'm thinking that it should when I turn the heater controls to A/C inside the cab? But isn't the clutch on some kind of pressure switch also that interupts it's cycles?

Help diagnosing problem would be appreciated.

 

[4X4HIGH]

Jump the low pressure switch and see if it works then, if so the system is low on charge or the switch is bad.

 

[blazerbones]

Thanks for info. Where is that switch located?

 

[odin]

In the low pressure (bigger) line at or near the receiver drier (cannister on firewall)
Jump the two pins in the connector together and the compressor should come on.