The door lock vacuum lines are color coded. A quick look in the factory
service manual will reveal what color does what. However, as so many
folks out there are inclined to work on their cars without the proper
tools and literature (which is a tool in its own right) here is a quick
run down on some common vacuum tubing colors related to the door lock
system. This will pertain to the following chassis at a minimum: 108,
109, 114, 115, 107, 116, 123, 126.
Door lock open (unlock) circuit: yellow with green stripe.
Door lock closed (locked) circuit: yellow with red stripe.
Vacuum supply to door lock system: yellow.
Supply line to vacuum plenum: yellow with gray stripe.
Supply line for HVAC: green with yellow stripe.
Blue, iirc: (SLs and coupes for seat locking mechanism).
In the archives, be it here or on mbz.org (from way back when) I have
provided step by step procedures for door lock and vacuum shut off
diagnosis. The test points for the door locks are easily found under
the front carpets, under the black plastic cover by the longitudinal,
close to the outer seat mount. In short, if the actuator does not hold
vacuum it is defective and needs to be replaced. These are black and
white, pass or fail. While on the topic, the door switch in the drivers
door seldom fails and more often that not leaks as a result of improper
alignment.
Mathieu
On May 1, 2009, at 4:19 PM, WILTON wrote:
To alleviate fear of reconnecting the vac lines wrong, code them with
little spots of different color paints on the lines and connectors. I
have several small bottles of different color artist's paint that work
very nicely for such. Different color tapes could do it, too.
Wilton
----- Original Message ----- From: "andrew strasfogel"
<[email protected]>
To: "Mercedes Discussion List" <[email protected]>
Sent: Friday, May 01, 2009 2:38 PM
Subject: Re: [MBZ] Frustration at underfunctioning door locks, w123
300TD
This is great in theory, but what I have found in practice is that
the lines
are a b*tch to disconnect, and if I do more than one at a time there
is that
fear of reconnecting them the WRONG way, with unknown but potentially
DIRE
consequences...
[with homage to Marshall...]
On Fri, May 1, 2009 at 2:05 PM, Craig McCluskey <[email protected]>
wrote:
On Fri, 1 May 2009 11:57:40 -0400 andrew strasfogel
<[email protected]> wrote:
> Brilliant! You'd be amazed at how much these tidbits of practical
> konwledge mean to me. ;)
>
> >
> > Golf tees are your friends.
I figured everyone knew ...
Not being there to point out things makes it frustrating trying to
help.
Isolating the problem to the lock circuit, as opposed to both
circuits,
does narrow things down.
The section in the shop manual should tell you the colors of hard
line to
expect. Isolating the problem to one of the three vacuum lines that
go
through the firewall into the passenger compartment (NOT the one that
comes back out and goes to the injection pump) will help, too.
Then, it's a matter of taking your Mity-Vac and going down the lines
from
the vacuum source to each of the destinations, evacuating each one
that
branches off the main line separately.
Craig
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_______________________________________
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To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
_______________________________________
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
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