Looking for W123 ACC wiring diagram - PeachParts Mercedes-Benz Forum

riethoven · #1 08-04-2006, 11:39 PM

Like so many others during the dog days of summer, I am trying to repair my ACC. I have a 1985 300TDt. I just recieved the service CD today, and the wiring diagram was badly scanned and is iledgeable.

Does anyone have one they could email me? I am trying to get the hang of this ACC system, and a clear wiring diagram would really help. I can see it is all about testing all of the components and fixing what is bad. The service manual is very helpful, and just spending time studying it has already shed some light on the system for me.

Next is jumping past the pressure cutout on the dryer to see if the compressor will engage. I have already made it run by supplying voltage directly to the clutch. The next thing is AC gauges so I can see how the R12 is looking.

Jeremy5848 · #2 08-05-2006, 01:04 AM

I had intended to refer you to Braingears (http://mb.braingears.com/) but the site isn't working tonight -- or my browser is just being stubborn.

riethoven · #3 08-05-2006, 06:51 AM

Quote:

Originally Posted by Jeremy5848

I had intended to refer you to Braingears (http://mb.braingears.com/) but the site isn't working tonight -- or my browser is just being stubborn.

Having just purchased the maintenance disc, I expected the wiring diagram for the climate control, which is illegeable on Braingears, to be clear on the disc, but it is the exact same scan!

I guess I need someone who has the print version of the factory manual.

dmorrison · #4 08-05-2006, 01:33 PM

The schematics are easier to read if you print them out from the Service Manual CD. And sometimes a magnifying glass is helpful.

Dave

klaus kallas · #5 08-05-2006, 09:03 PM

Quote:

Originally Posted by dmorrison

The schematics are easier to read if you print them out from the Service Manual CD. And sometimes a magnifying glass is helpful.

Dave

reithoven,

I just tried this with my 123 disc and it does seem to help. All the wiring color codes are readable when printed but some of the lines fade away. If this sounds any better than yours, I can email you the 19 pages of adobe files (might take a while!).

Klaus

Eskimo · #6 08-05-2006, 11:30 PM

Quote:

Originally Posted by riethoven

Having just purchased the maintenance disc, I expected the wiring diagram for the climate control, which is illegeable on Braingears, to be clear on the disc, but it is the exact same scan!

I guess I need someone who has the print version of the factory manual.

Give me a day or two, and I might be able to get you a clean scan of a printed diagram.

I'll need your e-mail address (you can just send it to me in a PM).

Do you have any issues with file sizes (speed of internet service, or limitations on the e-mail account)?

tobybul · #7 08-11-2006, 09:43 AM

Quote:

Originally Posted by riethoven

I just recieved the service CD today, and the wiring diagram was badly scanned and is iledgeable.

Where did you purchase the CD if I may ask. I am also trying to get a CD repair manual for my 85 300D. I called MB and they referred me to www.classictechlit.mbusa.com. I haven't seen this site posted by anyone else and it appears to be a great site for getting manuals for older MB's.

I just want to make sure that the manual is good and covers everything I need. Presently, I want to see the remove/install for the front wheel bearings.

I have a Haynes Manual for my 96 C220 and I like the content and presentation. If the MB fsm is the same as Braingears, I have to think twice about it.

jshadows · #8 08-11-2006, 12:09 PM

I believe I have the same CD as you. The wiring diagram that is linked off the web interface is for the older models. You have to go the CD directly and go to {CD}\program\Climate\83-600a.pdf .

The wiring diagrams are still crap, but the pinouts on the wiring harnesses are fully legible and probably a good place to start tracking down a signal problem (it's what I used to find that my blower regulator was cashed).