83 300SD Vacuum question

[BIGRED]

I just discovered that the 300TDT and 300SD vacuum systems are quite different and need some help.

The line that goes from the engine vacuum pump to the brake booster has some sort of valve, with a larger sized line that connects on top and goes into the fender well. Next to the valve or as part of the valve there are 2 vacuum male fittings. One seems to supply vacuum the other does not. I assum by someway the valve in the booster line controls this.

There is a clear line (white?) a brown line and a red with a blue stripe.

What is the purpose of the valve in the brake booster line and what is the path of the larger plastic clear line and its purpose?

Does the clear (white) connects to one of the 2 male fitttings on the line and supplies vacuum to the engine vacuum units. Question is which fitting?

Is the solid brown line is the engine shutdown vacuum supply and does it connect to the 2nd male fitting?

Is the red/blue stripe ACC vacuum and does it connet to the 2nd fitting along with the brown?

Thanks for your help.

Don

[BoostnBenz]

I can only really answer one of your questions because I don't really know which lines you are referring to. The purpose of the valve in the main vacuum manifold is a one way valve to hold vacuum in that portion of the line. The first line on the TD would go to your EGR valve, IP bleeder valve, and modulator. Everything else vacuum powered on the car goes to the latter line, primarily the HVAC controls, and power locks.