If your Dodge Ram's vent selector isn't working, there are a few things you can try to fix the issue. First, check to make sure that the vent selector knob is turned to the vent position. If it is, then try turning the knob to the left or right to see if that changes the airflow. If neither of those two things work, then it's possible that the actuator motor for the vent system is faulty and will need to be replaced.