Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-01-2000, 03:42 PM
Registered User
 
Join Date: Feb 2000
Location: Santa Clarita, CA, USA
Posts: 133
Hello,

The car is a 1991 420sel and when opening the driver door the dome light or exit lamp on the door does not function. The driver's power seat does not function when the door is open as well unless you turn the ignition on. The front door on the passenger side turns on the dome light and exit lamps when it is opened.

I checked the switch on the door pillar and it works. There isn't any power going to it though. When the door on the passenger side is opened, I can hear the click of the relay in the fuse box. I don't hear anything when I open the driver door. Are there separate relays for the driver and passenger doors? I checked all the fuses, they are all good. Any help would be appreciated...

Thanks

Nolan
Reply With Quote
  #2  
Old 12-01-2000, 04:59 PM
Senior Member
 
Join Date: Apr 1999
Location: Walnut,CA,USA
Posts: 554
p\seat,dome light

Check your fuse box there is a Power seat Diode replace the diode (color gray like a plug),dome light will be the warning module relay locate under driver side lower panel,right next the cruise control unit.(004 545 07 32) hope this help.
__________________
MB STARS Master Guild Technician,17 years MB tech
14 years independent shop owner
Reply With Quote
  #3  
Old 12-02-2000, 02:17 PM
Registered User
 
Join Date: Feb 2000
Location: Santa Clarita, CA, USA
Posts: 133
Thanks for the tips. Are there separate relays in the warning module for the driver and passenger side door or is it just one relay for both doors?

Nolan
Reply With Quote
  #4  
Old 12-12-2000, 09:56 PM
Junior Member
 
Join Date: Mar 2000
Posts: 28
91 420sel dome lamp inop from driver door

The fault is in the warning module. It also has the headlight on buzzer citcuit in it. It gets damaged when the left frt puddle lamp falls out and the door closes on it. the module fries itself to protect the fuse!
It lives under the dash, left sie, black box, 1.5x1.5 inches
Sometimes repariable with a good solder hand...
__________________
Michael Haven CMAT,CMM,L1
MPH Automotive Services
16510 Park Row
Houston, Texas, 77084
281-579-8885
Reply With Quote
  #5  
Old 12-13-2000, 03:04 AM
Registered User
 
Join Date: Feb 2000
Location: Santa Clarita, CA, USA
Posts: 133
Thanks for the info. I was planning to check out the warning module sometime soon. Hopefully I can repair it.

Nolan
Reply With Quote
  #6  
Old 12-16-2000, 03:29 AM
Registered User
 
Join Date: Feb 2000
Location: Santa Clarita, CA, USA
Posts: 133
The warning module/seat belt reminder was the problem. I opened up the old one and saw too many diodes that I didn't have time to mess with. I ended up buying a new one with a 1 year warranty from MB. Now the power seats, courtesy lights, seat belt reminder, and buzzer all work when the driver door is opened. Thanks again for everybody's input.

Nolan
Reply With Quote
  #7  
Old 12-17-2000, 05:46 PM
Registered User
 
Join Date: Jul 2000
Location: Sunny Florida
Posts: 199
My car is suffering from no dome light when the driver's door opens also, (1989 560SEL). I just dug around under the dash, and found the part number referenced above, (004 545 07 32), by MB Stars. Is it just the little guy that unplugs? About 1" x 1 1/4" x 3/4" deep, six contacts in it? Or is it the whole box behind it? I pulled mine out, opened it up, and it just appears to be 4 resistors on a small board.

Thanks for the info!
John
Reply With Quote
  #8  
Old 12-18-2000, 03:16 AM
Registered User
 
Join Date: Feb 2000
Location: Santa Clarita, CA, USA
Posts: 133
The warning module/seatbelt reminder has 8 pins. I don't know if the '89 model w126 has a different part #. It's right beside the cruise control module which is a much bigger box. I found that it's the easiest to pop the old module/relay out of it's "box" or housing instead of trying to remove the screw on it's bracket. Then you can just pop in the new module in the old housing. It's saves you the grief of removing the cruise control module and bracket. It's a real pain to put it back up there. Good Luck.

Nolan
Reply With Quote
  #9  
Old 01-15-2001, 01:33 PM
Registered User
 
Join Date: Jul 2000
Location: Sunny Florida
Posts: 199
Finally got to my dome light problem. Here are my results:
I attempted to pull the module from it's housing, as suggested, but was unable to figure this out as it sat under the dash. After I removed it from the car, I saw the small tabs which retain it in the housing. This is what I would do next time, as Deezelguy suggests.
I ended up removing the 10mm nut from the bracket holding both the cruise control relay and the warning module relay, unplugging the wires and then taking the warning relay apart on the bench. More on this nut later.
Upon inspection of the warning relay, I found some reddish brown crud on the PC board itelf. I wiped it off with a clean rag, and then check the continuity from pin to pin, where it should be according to the schematic diagram on the CD Rom. I found one place where I had no continuity. The problem was one of the solder tracks, (not proper term, I am sure), on the PC board was missing a 1/16 inch. This was from where the pin connects to the board and the first diode.
I had not purchased a new relay, so I soldered a small, (1/4 inch long), jumper on the board. Tough job, but it worked. I would not attempt to solder the board itself, unless you are an expert at this. Too easy to mess the whole board up.
Installing the relay into the case, left me with only mounting the relays back into the dash. I found that what I thought was a stud threaded into the casting around the master cylinder rod. Actually, it is a bolt, captured in the casting. I discovered this when the bolt pushed through, fell into the casting as I attempted to mount the bracket.
My solution to this was to stuff a rag in the casting, around the master cylinder rod and boot, stopping the bolt from pushing through the casting. MBenz engineering provided a hex shaped hole to trap the bolt from turning in the casting, (dunke shein!). So this was sufficient to do the job. Mounted the bracket, connected the wiring harness and now I have light!
Not too bad, but it is one of those jobs where you wish you had really tiny strong fingers, and no shoulders to allow you to crawl around under the dash.
Any questions, shoot me an e mail.
Reply With Quote
  #10  
Old 06-27-2003, 04:06 PM
wjm's Avatar
wjm wjm is offline
Statman
 
Join Date: Dec 2000
Location: Suburban Detroit, MI
Posts: 692
John,

I need to replace my warning module. do you remember the tabs that need to be adjusted to take it out of its housing?

My dome light is not working when my left door is open.. but does with right door. No "key left in car" buzzer nor "lights left on" buzzer either.

Funny thing is that the seatbelt buzzer IS working. Are they all controlled from the same module?

Willy
Reply With Quote
  #11  
Old 06-27-2003, 09:49 PM
Registered User
 
Join Date: Jan 2001
Location: California
Posts: 2,068
I documented the procedure here. If the link doesn't work, copy and paste it.

http://diesel.web1000.com/5/
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dome light problems on a 1987 300TDT swogee Diesel Discussion 0 06-03-2004 05:27 AM
Dome light not turning on when driver's door is opened. Steve190E 2.3 Tech Help 9 09-02-2003 01:34 PM
Dome light dead -- fuse OK, bulb OK, what next? JSlabotsky Tech Help 11 08-07-2003 09:20 PM
Door switch for dome light KNanthrup Tech Help 2 07-14-2003 05:56 PM
Rear dome light? zla39fj Tech Help 11 02-09-2003 11:24 PM



All times are GMT -4. The time now is 01:29 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page