There are 5 vac lines that go though the firewall on a 84 300SD. Red & Green strip, Brown,Brown & blue strip & 2 soild Black

What do the black lines do?

What are they connected to?

I cant find them once the go through the firewall. I have the under dash cover off & A/C ducts removed.

Both Black lines are leaking and want fix the problem.

Im not talking about the Black line that go's to the trans.

I cant find the black lines in the diagrams posted on the sticky.

Thanks for your help!

__________________
Matt (SD,CA)

1984 300SD.. White/Chrome Bunts..Green

1997 2500 Dodge Ram 5.9 Cummins 12 Valve 36 PSI of Boost = 400+hp & 800+tQ .. ..Greenspeed

2004 Dodge Ram 2500 4x4 Quad Cab Cummins 5.9 H.O "596hp/1225tq" 6 spd. Man. Leather Heated seats/Loaded..Flame Red....GREENSPEED

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