having vacuum system problems, and don't know where to start. presently my engine shuts off allright. but the master lock system doenst work, and hasent since i've had it. i have a haynes repair manual, but its scant on details about the vacuum system, and I can't even locate the vacuum pump. any help please?

also posted in vintage forum, didnt know which forum to use

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76 300D 108,110 miles
99 Saturn sl1 80,000 miles - moms
91 Grand Marquis 45,000 miles - Grandparents
97 Ford F150 - 16,000 miles - Grandparents
73 Ford Monarch (parked 65,000 miles - Grandparents

Start with these diagrams:

Vacuum Diagrams

The vacuum pump is on the front of the engine, with a big line leading to the brake booster. The other vacuum devices are suppled by branch connections to small lines.

how do i go about checking all the lines? on a side note, my windshiel wiper spray doesnt work either (but did when i got it) it sorta seeps out, is it a part of the vacuum system as well?

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__________________________
76 300D 108,110 miles
99 Saturn sl1 80,000 miles - moms
91 Grand Marquis 45,000 miles - Grandparents
97 Ford F150 - 16,000 miles - Grandparents
73 Ford Monarch (parked 65,000 miles - Grandparents

W123 Vacuum InterLock Diagram which is about the Door interLOCK system. Send me your regular e-mail address off-FORUM and I'll send you a higher resolution copy [just under 100K file size...MS Word] of the Vacuum InterLOCK system diagram I just created. The B&W diagrams can be difficult to interpret... so I think my diagram [in vivid color] might just help for your mid-70(s) MBZ.

I'm thinking of adding a single page of text with diagnostic and repair techniques for this same vacuum system. You will some of this already written into the diagram.

All the best,
Sam