First question, is your system working and the fan not blowing, or is it totally DOA. (Flip your switches in the dash and listen for blend doors moving, ac compressor kicking on, etc...

If you can hear things working, start with your fan relay or fuses. If they've fine, unplug your fan at the relay and jump the fan to see if it functions. If so, it's your relay. If not, it's your fan motor.

If nothing is clicking it's a safe bet the issue is in your control panel.....i might be as easy as checking the connectors for fretting corrosion. Use a little dielectric lubricant and plug them back in. If that doesn't get it going, I'd looks for a control head at pic-a-part or on eBay. 

Good luck!