why? what is the job, "diagnosis, put back one missing:"/? what?
Connie, only one book shows that ,its called the FSM
the factory service manual, and is online at ford (sold)
and shown on alldata.com log in and read it.
please post the job< we can;t help much with out that
and can not post all 50 pages in the HVAC chapter here.
diagnosis takes these facts:
there are 3 kinds. on all car,s some mix up all 3kinds.
cable (cave man simple) you pull handle, and cable moves and door opens (DAMPER BLEND OR WHATEVER)
VACUUM SYStems, you move the knob, vacuum is gated tot he hose the hose goes to the damper servo and it moves and again the door opens.
last is damper motors.
these are vary hard to test, because no 2 are the same.
each year uses different motors and the tests are unique.,
on my car, the only what to test them is with a factory scan tool.
on my other car, the FSM shows how to hot wire the motors
to test them, so back to square one,, the FSm.
alldata.com google it, its #1 , $15
helm $10
http://www.helminc.com/helm/product2.asp?Make=FRD&Model=TAUR&Year=2005&Category=37&class_2=FRD&mk=Ford&yr=2005&md=Taurus&dt=Online+Service+Information+%28OSI%29&module=&from=result&Style=helm&Sku=FCS2005TSWEBD&itemtype=N
there is never a reason to guess, the books are all online
just login and read.