This link will help you out.
<http://gti16v.org/tb879503.htm>

BTW, I ran my A/C the other day and only got warm air.  I tried to add a can
to it, but it wouldn't really take any.  After intensive head-scratching, I
finally figured it out -- the compressor wire had come unplugged.  D'oh!!!
Works great now.....

Bill Marshall
85 GL Tiico "Pandora's Box"
Aurora, IL