I checked wiring diagram and see no actuator unless it is vacuum. However there is a vacuum line leading to aux unit and it may goes to a vacuum motor that may be the problem. First thing is to start truck and see if vacuum is coming through the line if not that may be your problem so check for a broken line etc. It may have a colored stripe on it so find it under dash if no vacuum. I have included pic of vacuum motor as it is the only thing I can find on this.
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Tuesday, August 11th, 2015 AT 6:28 AM