Air conditioning wiring?

[Dogman12]

I have an 85 Jimmy with factory air, all of the parts were removed by PO exept the dash controls, I swaped a 89 TBI 350 with air in and have replaced the rest of the ac parts. I know the light green wire goes from the hvac contol in the dash to the presure switch, the dark green goes from the othe side of the prsure switch to the compressor and ecm, my question is where does it pick 12v power? I know it should get power when the key is on just not sure where it enters the loop. I just dont want to fry anything! I reviewed all my wiring diagrams from the tbi swap but could not pin point the dark green wire route.

Thanks
Jesse

 

[lectric80]

The power is drawn directly from a fusible link attached at the starter on mine. The only thing that gets power from the ignition, besides the fan circuit, is the A/C relay. The load on the clutch is too much to run through the standard fuse box on these trucks.

 

[Dogman12]

Thanks

It appears I am missing the AC relay, can you tell me where it is located?

Thanks

Jesse

 

[lectric80]

It is a small silver box mounted directly to the box on the passenger side of the firewall.