My wifes Grand Caravan is not blowing cold air in front but back ac works fine.

OK,how do I go about testing to see if it is the fan or not? Thanks

Apply 12 v (not for long)to the blower connection will make it run, if it doesn't you found the issue. I would after replacing the blower dont put it completely back test the speed settings to make sure the blower resistor hasn't also been compromised