Control Module Power Supply: +15
WARNING: This page is about a different car, the 2007 Saab 9-5 and 2006 Saab 9-5. However, it is still accessible from the selected car via links, so may be relevant.
Control module pin 43 is supplied with current from the +15 circuit via fuse 27. The control module is activated when current from the +15 circuit is applied to pin 43.