I understand the idea of dampers and actuators. Is there a drawing available that shows the different dampers and their locations.
My car wont blow air outof the defroster vents. on 1997 Buick Park Avenue
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you may have a small vac leak under the hood at your vac ball,start there and ck hoses thru firewall to controller
where is the vacuum ball?
under hood on pass side inner fender i believe. its a 3" blk ball with 2 vac hoses attached to it,follow the hoses and look for breaks or cracks