Date: Sat, 29 Jul 2000 15:49:35 -0500
From: "Walt Kienzle" <wkienzlenopsam.com>
Subject: Re: ACC diagram


When you say "doesn't stop cooling" do you mean that the A/C compressor is still running even after you turn off the ACC, or do you just mean that the blower fan is running? (expected answer: blower fan only.) Can you adjust the fan speed or does it seem stuck on high speed? (expected answer: cannot adjust fan speed, fan always runs at high speed.) Does the fan still keep running even after you take the ACC unit out of the car? (expected answer: yes) Can the fan only be turned off by shutting off the ignition or pulling the heater fan fuse? (expected answer: yes) The display dimming when you turn it on and then going to normal intensity with about 5 seconds is normal from my experience. I don't have a diagram either, but if your responses match what I have outlined in the first paragraph, it is likely that your fan speed electronic control unit has malfunctioned. This part is located under the hood behind the false bulkhead directlly under the A/C reciever/drier. It is fastened with 4 small Torx screws to the air intake ductwork for the ACC system and has a 4 wire connector. The part costs about $150US from the dealer. If you are handy with a soldering iron, you can replace the transistor (I believe it is a Triac) inside that usually fails. I was able to order the transistor from Radio Shack for $10 plus $1 shipping. Walt Kienzle 1991 9000T "BGJ" <altechnopsam.uni2.dk> wrote in message news:lVgg5.146$H07.3998nopsam.get2net.dk... > I have troubles with the ACC in my Saab 9000 CD from 1991. It does'nt stop > cooling, even when I switch it off, and when i turn it on, the intensity of > the temp-display starts very low and then gradually grows to normal (within > 5-10 secs). As far as I can recall, this is not normal ??. > I need a diagram over the ACC-circuitry, which is not in my Hayes-manual. > Can anyone help ??? > > Thanks in advance > > BGJ > >

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