You want this forum instead. The one you posted in is for the 2003 and later models.

 

Ooops, thanks. It looks like it was moved to the correct forum.

 

This should not be that hard to diagnosis with the Saab factory manual schematics; but they had best be good:cheesy: !

Does the A/C do any after-running ; much as the cooling fans do ???? Trying to figure out the relationship between the AC and the engine operating system...

 

I have the schematics, but they arent helping yet.

When the key is removed everything works like it normally does when the key is in the ignition. It is an automatic so I cant drive it that way though. As soon as you hit the off button on the A/C control the car shuts off along with everything else just like turning the key off normally does.


If I remove the #19 fuse that will also turn it off, That fuse is for the A/C, Rear fog lights, and the ABS system.

I have heard some weird stories about having cheap bulbs or burnt out lights can cause it? The rear fog lights dont seem to work as the switch on the dash is bad, it wont puch in and stay, nor work the lights. Maybe thats causing it?

 

I have heard some weird stories about having cheap bulbs or burnt out lights can cause it? The rear fog lights dont seem to work as the switch on the dash is bad, it wont puch in and stay, nor work the lights. Maybe thats causing it?

No, the fog lights cannot cause this, nor can any light on your car. Some oddly wired 80's cars would sometimes do this if a front corner light was installed the wrong way - but not the fogs, it ain't possible!

And, btw, there's nothing wrong with your fog button either - it's supposed to work that way. It's a feature, not a bug... it's meant to help keep us from old men in hats blinding people behind them because 3 weeks ago, when he last drove, it was foggy outside and then he forgot to shut the lights off. If you want to use your rear fogs, you have to press the button everytime you start the car. So, in other words - your non-functioning rear fog light is likely just a burnt out bulb!

 

Oh yeah and by the way, just a thought:

You wouldn't happen to have an aftermarket alarm in the car, with remote starting? If a gizmo like that stops working you can get all sorts of phenomena. Could also be a turbo timer of some sorts that someone installed!

 

No aftermarket anything on it. With the kewy out it will run until it is out of gas. According to some other threads I have read a incorrect bulb or wiring can cause this and did for one guy, if the bulb isnt the same resistance as whats supposed to be in there. I know on Mercedes a bulb with the incorrect resistance will make the dash light come on and say there is a bulb out, when there isnt. I have had it happen and had to use a Mercedes bulb for it to work properly.


So the switch for the rear fog ligths is a momentary one then?


Any other ideas?

Also if the battery is disconnected, when it is hooked back up the radio will come on and stay on.
It has been fine but recently has started doing this more frequently.

 

I'd check out the ECU; there seems to be a glitch there. maybe:nono;

At a dealership, I would definitely do some major component switching; if these control units are reasonably accessible..
Also check out the ignition switch, but I do not know why the AC is inviolved....

 

This may not be very helpful, but I can tell you of something that I encountered back in the late 1980's: I would occasionally run into a vehicle which would run on for some time after the key was turned off (not dieseling, but actual ignition). What I found was that the cooling fan, which was running when the car was turned off, would continue to spin, acting as a generator and backfeeding power to the ignition system, letting the vehicle run. Disconnecting the fan killed the engine. Apparently there was a diode somewhere in the fan motor or in the harness that was meant to prevent this, and failure of this component allowed the reverse flow of power. My solution was to solder in an appropriate diode, and the problem immediately went away.

Our Saabs may have a more sophisticated problem than this, but the easy check would be to disconnect the fan, leaving everything else hooked up, and see if the problem is "cured."

 

I will try disconnecting the fan, I am sure not going to start replacing module and computers.

I have disconnected the igniton switch and the car still runs on so its not in the switch.

The fan would also be tied into the A/C since they usually turn on as soon as the A/C is turned on.

 

The fan would also be tied into the A/C since they usually turn on as soon as the A/C is turned on.

Exactly what I was thinking as I read the prior post. It truly sounds your culprit... Best of luck!

And to think, we have people posting about cars that won't start... Funny, innit...

-bny

 

Found out what was causing it, someone shorted the A/C relay with a piece of wire and it was causing the A/C to run constantly, which held on the ignition circuit also. They might have done it to get the compressor started if the freon was empty I don't know. It shuts of fine now that the wire is removed.