The FSM recommends using ATF to lube the linkage, but I wouldn't use it for the door hinges. I don't know what car you have, but on my w123s there are needle fittings to allow filling them with grease.

As far as using it on the blower motor, it doesn't seem like it would last very long to me.

__________________
Chad
2013 Jeep Unlimited Rubicon
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

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1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL