'91 940 turbo, no A/C
 

just bought a '91 940 turbo, and the a/c doesnt work. the compressor isnt coming on.

how can i tell if it has been converted to r-134a? and where is the schrader valve for the low side?

also, where is the relay located for the a/c and how can i test that?

RE: '91 940 turbo, no A/C
 

The schrader valve should be next to the dryer.
If there is a funny looking connection at the dryer it should be converted.

Unplug the low pressure switch at the dryer and jump it with a wire with the car running and see if the compressor kicks in. If it does then most likely you are low on freon.

RE: '91 940 turbo, no A/C
 

can you tell from these pictures if it has been converted to r134a? and what does the low pressure switch look like, can you see it in these pictures?

http://img45.imageshack.us/img45/945...rboac02ni7.jpg

http://img66.imageshack.us/img66/231...rboac01rn8.jpg

RE: '91 940 turbo, no A/C
 

That is still R-12.
The low pressure switch is the thing screwed into the Dryer(Aluminum cylinder) That has the plug that goes to it.