Brake lights flash briefly but won't stay on - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 01-18-2014, 08:20 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
Brake lights flash briefly but won't stay on (Resolved)

My brake lights illuminate briefly but won't stay on for more than a few seconds while pressing the brake pedal, almost as if they are overheating and a fuse is kicking them off but they will come back on again briefly if I let off and press again? Any suggestions? I do not believe it is a ground because I am adamant about keeping them in good shape and no other symptoms. Could the brake pedal switch cause this or...?

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra

Last edited by DirectLA; 01-21-2014 at 04:11 PM.
DirectLA is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 01-18-2014, 08:55 PM
BenzWorld Extremist
 
Date registered: Sep 2012
Vehicle: 300sel W109, 280S 70 , 220s 62. 230 66. Lancia Flavia 63.Pininfarina
Location: Totteridge London.
Posts: 807
Mentioned: 0 Post(s)
Quoted: 59 Post(s)
Most likely the switch . If you remove the connector at the switch and connect the pins with a wire it will confirm operation of lights .
A shot of contact cleaner will likely get the switch and pins operational .
adler is offline  
post #3 of 6 (permalink) Old 01-19-2014, 01:28 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
Thank you. Do I need to remove the pedal assembly or anything in-depth to reach the switch or is it readily accessible to remove fully to clean? I won't be able to have a look at my car until later this week.

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra
DirectLA is offline  
post #4 of 6 (permalink) Old 01-19-2014, 06:58 PM
BenzWorld Extremist
 
Date registered: Sep 2012
Vehicle: 300sel W109, 280S 70 , 220s 62. 230 66. Lancia Flavia 63.Pininfarina
Location: Totteridge London.
Posts: 807
Mentioned: 0 Post(s)
Quoted: 59 Post(s)
No. Removal of pedal required.simple plug removal.
adler is offline  
post #5 of 6 (permalink) Old 01-21-2014, 04:15 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
After using Adler's method (thanks!) to test the circuit I realized the pedal actuated switch was fine, so I then found that the pressure switch mounted to the master cylinder wasn't working properly. I was able to find a suitable replacement and with some minor work on the connectors, the brake lights again function as they should. I will be putting together a DIY for this repair with pics in the next couple of days and will add the link to this thread.

It was a very simple repair and one I found fairly enjoyable being rather straightforward. Those are rare so I will take them when I can.

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra
DirectLA is offline  
post #6 of 6 (permalink) Old 01-30-2014, 02:18 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
As promised, you can find the link to my brake light tutorial on The Coupe Group DIY page here. It will take you to my art site where the articles are hosted.
Brake Light Pressure Switch DIY

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra
DirectLA is offline  
Sponsored Links
Advertisement
 
Reply

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