On my 1980 300D I have the old style vac pump with one hose going to the air cleaner. The other one goes to the brake booster with 2 nipples before it one going to the top of the valve cover and the other going to a four way which includes a 1. BROWN line which I THINK IS TO THE IGNITION and another to the 2.door lock check valve and the 3. to a GREEN line which I have no clue where it goes. My locks dont work, there are no leaks in any of the elements (I checked) . From nipple which goes to this four way it was showing about 20in of vac. When the four way was connected I checked from the end of the connecter that goes to the door lock check valve and would not show any vac. (by the way locks are not operating)so then I checked the BROWN line and pulled vac on it and it holded it. Then I checked the GREEN one and it would not hold. And to you know on the door lock check valve it has 2 outlets right one which has the cruise control hooked on and the other outlet with a three way one with the vac tank conneted (to the trunk) and the other the suction line. Is this supposed to be like this?

So when I rig it and take out the cruise control from the check valve and hook one outlet to the vac tank and the other outlet to the suction line and directly hook it up to the nipple on the hose coming from the vac poump the locks work.

Im realy not sure how these line are suposed to be arranged in order for everything to work. I need to know where the BROWN line goes to? and the GREEN line whick I cant get to hold Vac.

Anything would help me out THANKS

The green line goes to the vac of the climate control system. Behind ccu unit in dash.
The brown line goes to ignition switch, and from switch to back of IP.
Yellow to door lock, yellow with gray stripe to vac res. in back. On many I've seen, the yellow and yellow/gray come from the check valve.

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

Yellow should be door locks, green should be climate control, and brown is engine shut-off.

Is the GREEN line supposed to hold vac if pulled on with a tester?

And the the vac tank line and the yellow suction line is connected with a "T" and is going to only one outlet of the door lock check valve. The other outlet is connected to the cruise control line. Is it supposed to be like this?

The green line should hold a vac. Sounds like you prolly have a rubber diaphram or two that are ripped.......
It takes up to a hundred or more pumps with the mightyvac to pump up the line to the vac tank in back.....

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

Try changing the climate control to different settings and re-test the green line for each button setting.

Which diapharm? I tested the tank it holds vac. Im not sure the setup of the lines are right. Do you hav a diagram of of one this model? A/c doesnt work only until i pree th defrost switch but it doesnt cool anyways.

There are many different minor variations of our vac systems. Best bet is do a search here, and look at several of the examples. Then compare it to your components and route accordingly. It isn't too difficult once you sit down to do it. The difficulty comes when you realize the dash needs to come out to get to the vac pods.
Sounds like you have all the issues: vac leak, ccu issues, AC problems......
At least cooler weather is on the way.....

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

a good source of info that I remember was http://tech-meister.com/DieselBenz tons of information to get you started including vac diagrams.

edit: the site appears to be down at the moment or having problems. check back on it later

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350