Subject: RE: Please advise on A/C conversion

[David.Ullrich at ferguson.com]

Is it possible that it could be "weak" and not clamping with enough force any more? Slipping? I do eventually get the vent temps down to where others have them, it just seems to take my car a lot longer...

I do get a click, and it is obviously working, but I'm wondering about slipping. I knew about the 12v lead, that's what is signaling my pusher fan to come on (turn on lead) so that the pusher fan only comes on when the AC compressor is on.

Thanks,

Dave

Too Many Toys:
2002 VW Jetta GLS 1.8T Tiptronic
1993 RX-7 R1
1987.5 Audi Coupe GT "Special Build" 2.3 - Anthracite Black
1985 Chevy Impala Interceptor


-----Original Message-----
From: Christopher Ritchie [mailto:critchie1 at hotmail.com]
Sent: Friday, July 19, 2002 2:15 PM
To: quattro at audifans.com
Cc: David Ullrich - 0018 HQ; Greg.Roa at Cinergy.COM
Subject: Subject: RE: Please advise on A/C conversion


>So, how can I further diagnose the clutch? Remember, I'm new to
>this DIY ca=
>r stuff...


The clutch is either on or off.  There is 1 wire going to it.  If that 1
wire gets 12vdc, the clutch is energized and goes on.  "Going on" means
clamping onto the spinning pulley.  When it does this, you can hear it
"click" and see it jump to grab (connect to) the pulley - the whole thing
down there will now spin as a solid unit.  "Off" means the clutch has no
power.  The clutch plate is not connected to the spinning pulley.

That 1 wire is the output of all the A/C system.  Bentley takes hundreds of
pages to diagnose the A/C system.  But the clutch is easy.  12vdc to the
wire - it goes on.  No power - it's off.

That's how you test the clutch.  Jumper a wire from the positive battery
jumpering post in the engine compartment to that single clutch wire.  See
what the clutch does.

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