It is more than likely just cycling in and out on the High Pressure or Low Pressure protection switches.
Doesn't sound like a relay prob.

David Del Ben
85 1.9-Vanagon

-----Original Message-----
From:   Tom Callan [SMTP:T517CALN@AOL.COM]
Sent:   Friday, September 08, 2000 8:02 AM
To:     vanagon@GERRY.VANAGON.COM
Subject:        testing relays

My 91 Vanagon has the A/C cutting in and out at odd periods. When it works it
seems to cool fine. I suspect the A/C clutch or compressor relays in the left
rear pillar of the body. Is there any way to test a relay - by pass it or
short it out - to see if that's the problem?

The dealer charges $60.00 for the AC relay so I would only like to replace a
known defective part.

Also eager to hear the list reaction to Autofrost R-406a refrigerant as
replacement for R-12. 5-10 degree cooler air would really help in Houston,
TX. Are some of the OEM parts replaced in the conversion?

Thanks
Tom Callan
91 Carat
Houston TX