W-140 Turn Signal Problem - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 06-25-2002, 06:13 AM Thread Starter
BenzWorld Newbie
 
Date registered: Dec 1998
Posts: 0
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
(Thread Starter)
W-140 Turn Signal Problem

I have a 1992 400SE with an itermittent problem with the right side turn signal lights. When the car is warm or it is hot outside - the turn signal lights stay on - even with the indicator stalk inside in the center position - the only way to get the lights off is to disconnect the #17 fuse - the lights will not stay off until the car cools off - the Lighting control module has been replaced by the local dealer for almost $400 - their next fix will be to replace the multifunction stalk - Anyone have any other ideas? I live in FL where it is warm - the dealer has had the car three times in a month - and still can't fix.
Guest (MBNZ) is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 06-25-2002, 07:02 AM Thread Starter
BenzWorld Newbie
 
Date registered: Dec 1998
Posts: 0
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
(Thread Starter)
Re: W-140 Turn Signal Problem

I don't know MB uses flashers (similar in shape to relays) to perform turn signals. I would check that to see if that is the culprit. If the left side is working fine, swap'em. If it is functioning correctly, you should hear a faint click-clack sound when it is on.<br> <br> Also, check the basics: light bulb(s) are good and has a clean ground contact (else clean it).
Guest (MBNZ) is offline  
post #3 of 3 (permalink) Old 07-06-2002, 04:45 AM Thread Starter
BenzWorld Newbie
 
Date registered: Dec 1998
Posts: 0
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
(Thread Starter)
Re: W-140 Turn Signal Problem

The former replier is right-- more electrical gremlins are caused by bad contacts than by anything else, but the only way you are going to find out for sure is to take a good VOM (Volt-Ohm-Milliameter), and go through the entire system backwards from the signal light itself, tracing back that live twelve volts until you find out which part is freezing in the 'on' position when it is hot.<br> <br> One hint: in all the 1988 and earlier electrical systems I have worked with, there is only one flasher relay, so that can't be it. Although you can't swap the signal lever, you should be able to swap the WIRES going to it-- if that transfers the problem to the other side, you've found it!<br> <br> ...And don't expect too much in the way of electrical help form almost any mechanic-- practically none of them understand electricity, and if they don't have a step-by-step troubleshooting guide or a diagnosing computer, they're helpless. I supported myself through college by doing piecework for three different foreign car dealers who couldn't read wiring diagrams!<br> <br> Good Luck!<br> Rex
Guest (MBNZ) is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > General Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
     
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode



    Posting Rules  
    You may post new threads
    You may 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 Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome