Did you check if you were getting power at the connectors near the blower (to determine if the fault is wiring from switch to connector)?
And did you check if you were getting power at the connector for the switch (to determine if the fault is wiring from the the fuse to the switch)?
Also read this.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1056473&page=&view=&sb=5&o=&fpart=all&vc=1
