The fob opens/closes all the doors except the drivers - nothing happens. The drivers switch does not work any doors. So it is either the actuator or the switch. How can I tell if the switch is faulty or the actuator? Thanks.

 

After reading your problem it seems that switch is creating problem,If it would be the Actuator then all the door's would be facing the same problem,but its not so its Switch,still check it out from the garage.