Pull up on the cupholders in your center console and it will snap out. The blower is right there, and if I remember correctly, the harness for it is right there as well. If you don't see it, then you will have to remove the center console to get to it as it's attached to the bottom of the console. What you want is to test for voltage at the harness to see if power is even getting to the blower.
Here's a thread that will help - http://www.mazdas247.com/forum/show...New-Head-Unit-Speaker-Installation-(-09-Sport)