I have a 1992 SAAB 9000 Cs Xs and my interior ventilation fan has packed up except for the high speed setting. I assume this to be the fan speed controller but I can't find it. I can't see any thing in the engine bay near the fan that fits the bill but there do appear to be a couple of possible candidates behind the instrument panell above the fuses. A haven't found anything else. Can you help to point me in the right direction please?