Step motors, REC motors, blend doors, etc....need help - Saab 9-5 Bulletin Board - Saabnet.com
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Step motors, REC motors, blend doors, etc....need help
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Posted by JonH (more from JonH) on Mon, 20 Oct 2014 17:36:10 Share Post by Email
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Okay, so I'm a little confused. I have removed the stepper motors on both sides of my left hand drive, 2004, Aero, 4 cylinder. I am planning on ordering and replacing the stepper motor shafts with the longer (genuine SAAB - p/n 12765864) version (male) shaft because the ends of the (female) shafts are cracked. Before proceeding, I would like to make sure the shafts are doing their thing by manually manipulating the them, but I don't which shafts do what. (It's difficult to do when you don't always have a helper). On the left side of the car there is a white arm attached to a yellow shaft that I believe opens and closes the blend door. Is that correct? Does this door direct the air flow to defrost or to the floor OR does divert hot air/cold air?
Same thing on the right side except there are two shafts. One is a white arm attached to a blue shaft and the other is a yellow arm with what looks like a yellow shaft. I have read some information regarding how to do this but it is not clear and I have not figured out in my mind how the system functions, with all the flaps, doors, motors, sensors, solenoid valves switches, etc. The bottom line is how do I make sure the shafts are operating correctly and not broken before I proceed?

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