[V8] Air Conditioner Question

Scott DeWitt sdewitt at stx.rr.com
Wed May 31 21:49:38 EDT 2006

Did you check the freon level?
----- Original Message ----- 
From: "alexander stickler" <a_stickler at yahoo.com>
To: <v8 at audifans.com>
Sent: Wednesday, May 31, 2006 4:30 PM
Subject: [V8] Air Conditioner Question

> Hi!
> I've been on the UrQ list for a while now, but just
> added a 1990 V8 with 370,000km to the fleet.
> Question:  A/C compressor is not coming on unless I
> used a jumper to supply power to it. The control unit
> in the center console seems to be working, swapping
> the relay doesn't help, and swapping the AC programmer
> doesn't seem to change the situation.  This leaves me
> to question if the interior temp sensor is working
> properly. I can make the compressor come on when I
> ground the AC Thermostat (under the hood, near the
> cowl).   The only thing that  seems weird is that the
> wiring diagram shows two black wires joining up at the
> AC relay (position 10 in the passenger footwell) - my
> car has only one.  One of the wires should becoming
> from the AC controller (in the center console) and the
> other from the low pressure switch.  The V8 we were
> pulling parts from to test (not sure if those parts
> were good or not) was also a 1990 and it did have 2
> wires coming into the relay.
> Any thoughts? Any BTDTs?
> Once the compressor is on it does blow extremely cold
> air, so I think I am very close to a solution, but any
> input would be greatly appreciated.
> Regards,
> Alex Stickler
> '83 URQ with 3B 20VT
> '90 V8 Q with 370,000km
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