Hello:
   I am trying to connect my rear diff switch vacuum hoses that were
disconnected by the PO. Referring to Bentley, I got the dash hoses back okay,
but I cannot figure out why I don't have vacuum on the black hose.  With the
engine running, there is no vaccuum at the reservoir on the left frame rail or
on either side of the blue/black check valve(?) next to it.  The hose from
that valve tees into a large plastic hose on the left frame rail; that tee is
not plugged up.  I tried to trace the large hose, I believe it goes back to
the left side of the engine compartment and thru a yellow check valve to the
air distribution box.  I think the other end maybe goes to the power brake
booster under the dash but I'm not sure.  There is vacuum at the yellow check
valve in the engine compartment.  Am I overlooking a page in the Bentley or
can someone tell me where the vacuum source is for the black hose?  It is my
understand- ing that the blue and white hoses are "downstream" of the black
hose at the diff switch and thus have no bearing on this.  Any help is
appreciated!

Cary

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