Re: A/C Compressor Troubleshooting on an '88 5KSQ

["Fred Munro" <munrof@isys.ca>]

-----Original Message-----
From: Christopher J. Ritchie <cjr1@gte.net>
To: quattro@coimbra.ans.net <quattro@coimbra.ans.net>
Date: Wednesday, June 24, 1998 2:34 AM
Subject: A/C Compressor Troubleshooting on an '88 5KSQ


>Trying to determine the status of the air conditioning compressor on my
>1988 5000S Quattro before I waste the $$ to recharge with R12 or convert to
>134a.  I have the Bentley and am going through the troubleshooting
>procedure.  Does not blow cold air when A/C switched on.  Clutch does not
>seem to "click" (and compressor does not seem to engage) when A/C turned
>on.  I understand that this condition is caused by either low or no
>refrigerant charge, or a bad clutch or compressor.  Isn't there a way to
>momentarily bridge some contacts or jumper current to the clutch in order
>to determine whether the clutch is any good?  I cannot find anything in the
>Bentley on this.  TIA for all suggestions.
>

    You can pull the clutch connectors and jumper 12V to the clutch
directly. The clutch should engage.
    I have had problems with the connectors at the evaporator temp control
switch which prevented the clutch from cycling on both my '86 5ktq and my
'91 200q. Cleaning the connectors and the switch contacts solved the
problem.

HTH

Fred Munro
'91 200q  255k km