I found it laying down by the control arm on the passenger side. As best I can tell the wire runs up above the ac compressor. This is on a 92 4x4 truck with the v6

 

That is a 92 and a V6 truck so is different then what I am use to seeing. I am thinking it goes to a sensor on the transfer case but could be wrong. On the earlier models I see it disconnected numerous times as it is easily snagged on brush or similar obstacles.

 

What color is the wire?

 

Looks like the AC compressor clutch wire.

 

i believe it was black.

 

i was thinking it went to the ac compressor but I couldn't tell. The truck has had a massive power steering leak for awhile so the compressor is totally caked in grease and grime :/

 

Leaking at the pump? My 4Runner had a massive PS leak a couple years after I got it, someone ran power steering fluid in it instead of ATF. Not good for the seals.It's easy enough to rebuild the stock pump, or get a decent replacement from Napa. Probably been 10 years now without a drop.

Anyway, that wire should be powered if you turn on the AC button (engine on), assuming everything else in the system is connected and functional.

EDIT: The wire coming out of the harness should be black with a white stripe.

 

yes it is black with a white stripe. And now that you mention it, the green light doesn't illuminate anymore when I push the ac button in. Now I just have to try and figure out where it connects.

 

If you are getting voltage out of the harness with the button pressed, it could be as simple as the LED in the switch. I have had AC issues with Toyota's "AC Amplifier" which is behind the glove box, it controls all things AC (clutch) based on signal from temp sensor (on 4WD trucks), pressure switch, ignition signal, thermistor, etc. I don't know how common it is for them to go out, but it happened to me.