Best way is to check the fuse. If it's okay, I'd jsut pull the blower motor. Should be behind the glovebox, in all that mess under the dash. Once it's out, check it and see if the motor is still good by hooking it up to the battery. If it whirs to life, you've got a relay, or switch that's causing your problem. If it does nothing, well then there's your answer.
I have a full tank of Unleaded...
5 liters and 12 cylinders of fury....