89 GTU AC wont kick on

felixGTU · Post by **felixGTU** » Mon Sep 17, 2012 12:50 am

My 1989 GTU A/C clutch will not come on by itself. I checked and added refrigerant and it is good fuses seem good. Is there something else that can cause a problem? If I put current directly to the compressor it does turn on and it is cold.

scd88ga · Post by **scd88ga** » Mon Sep 17, 2012 1:07 am

Check the relay.

Post by **3X00-Modified** » Mon Sep 17, 2012 7:46 am

Split topic since its a completely different subject.

felixGTU · Post by **felixGTU** » Mon Sep 17, 2012 4:12 pm

Where is the relay? Fuses are good. Do you guys know which is the low pressure switch and high pressure switch for the A/C?

pghturbo88 · Post by **pghturbo88** » Mon Sep 17, 2012 9:22 pm

Low pressure switch on my 89 GT is on the compressor body itself. Also, I believe that the PS hose has a cutoff switch in it as well (supposed to cut out the AC if you are doing parking lot maneuvers). This is a case where you need a wiring diagram, it would help end some of the guessing. I haven't looked there in a while, but you used to be able to access service manuals at autozone.com.

themixer · Post by **themixer** » Tue Sep 18, 2012 9:49 am

I have the 1989 factory service manual if you need anything PM me i can scan it

Beretta.net