It could be a lot of things, low or no freon, a blown fuse, a bad mag clutch, etc.

 

Where are the fuses located for A/C, I couldent find anyone labeld for A/C, also what shoud I be checking first? the clutch turns by hand but thats about it. Any ideas?

 

The fuse for the A/C is behind the glove box, its a yellow on i think. Check that first. To make a long story short i had a mechanic take a look at my A/C before to make sure the compressor was engaging and he ended up sending a straight 12V through the entire A/C system, i left out of there with the A/C stuck on. So i went back and they told me there's nothing they can do and that it was just coincidence that it happened while the guy was testing it. Took it home and checked the fuse and it was blown, put a new one in and it still did the same thing, come to find out he fried my A/C Amplifier with the straight 12V. Had to fork out $80 buck for his stupidity. Better luck to you thought!!!

 

before you go to a lot of ghost hunting---- check to see if there is any freon in the system/ pressure !!!! ????


(if it is low=== i won't work at all !!!!!!!!!!!)

 

Compressor won't switch on if there is inadequate refrigerant. If the belt was off and system wasn't run for along time, the refrigerant likely mostly leaked out

1993 and earlier models take R12 refrigerant. '94 and '95 take R134a

If all the refrigerant has leaked out, the system is contaminated with moisture and needs to be vacuumed and the receiver-drier needs to be replaced. Since you apparently bought the truck cold turkey without knowing the maintenance history of the AC system, you could potentially end up throwing hundreds of dollars at the system and still not have it work reliably.

 

Compressor won't switch on if there is inadequate refrigerant. If the belt was off and system wasn't run for along time, the refrigerant likely mostly leaked out

1993 and earlier models take R12 refrigerant. '94 and '95 take R134a

If all the refrigerant has leaked out, the system is contaminated with moisture and needs to be vacuumed and the receiver-drier needs to be replaced. Since you apparently bought the truck cold turkey without knowing the maintenance history of the AC system, you could potentially end up throwing hundreds of dollars at the system and still not have it work reliably.

I have a 1994 and it has R12. 1995 was when the federal mandate to use R134a went into effect.

 

All 1994 model trucks with factory installed AC have R134a. But 1994 trucks with dealer installed AC may have R12

 

R12, R134, Z28, F16, whatever. Like I said in post #2, if it's low or empty it won't work.
To see if the compressor and clutch work, run 12V directly to the clutch. It's easy to find, it's the only wire going to the compressor. You could try it first with th engine off, and if it engages try it with the engine running. And while running look at the sight glass for bubbles. You could also bypass the low press sw, it's in the ductwork behind the glovebox IIRC.