[yeswedeliver]

My book for my 1991 Pontiac transport seems to be missing some important info and I am hoping for some help. My front heater/ blower motor won't turn on when I push the button; however, when I tapped the housing under my radio - it free'd up something and it would begin to turn. I am convinced its not a short but maybe some debris or rust or something.
Here is the issue: My Haines book shows me the access to the housing and motor is from the engine compartment. Accepting that this is true [it is] then what is this monstrosity of housing, vacuum hoses, and controllers that is under my dash? What is this large, seeming self contained, box? What is it called? How do I access - remove it? When I tap on the corner - what is inside that could possibly cause it to 'release' the fan? No fan part is in there right? What is in there? Where might I find a blowout diagram of it and its internal functions/parts? Finally, in order to seek images and more information - WHAT IS THIS THING CALLED? It is just not in my book.My front blower motor won't turn on when I push the button; however, when I tapped the housing under my radio - it free'd up something and it would begin to turn. I am convinced its not a short but maybe some debris or rust or something. Here is the issue: My Haines book shows me the access to the housing and motor is from the engine compartment. Accepting that this is true [it is] then what is this monstrosity of housing, vacuum hoses and controllers that is under my dash? What is this large, seeming self contained, box? What is it called? When I tap on the corner - what is inside that could possibly cause it to 'release' the fan? It is not in there correct? What is in there? Finally, in order to seek images and more information - WHAT IS THIS THING CALLED? It is just not in my book.