Just a thought, can you electrically disconnect the blower motor easily? If so, disconnect it and try the blower switch. If the fuse does not blow, the motor is your cause. If the fuse does blow, look for bad wiring or something else shorted to ground or pulling too much amperage.

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2012 Mercedes ML350 Bluetec 102K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 238K (mine)
1998 Volvo S70 T5 Turbo 211K (kids)
1994 Ford F150 4WD 246K (firewood hauler)
1983 Mercedes 300D 384K (diesel commuter)