The large or main vac line leading to the brake booster should lead you to the vac pmp. Follow the line to its source. Without going out to check mine, I believe the PS pump is above the vac pmp. Regardless, following the line would help you locate it.

Can you test for vacuum? Do you have access to a vacuum gauge or Miti-Vac?

__________________
Steve
'87 300TD - 132K - Soon 4-Sale
'84 300D Turbo - 122K - Driving
'77 VW Type II - 77K - Restored
'08 250EX Ninja
English Bulldog (Brier) - My best friend. Passed away 12/02/04 while in my arms.