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-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-23-2013, 04:52 PM
Registered User
 
Join Date: Mar 2012
Location: Brooklyn, NY
Posts: 53
W123 rear defrost switch help needed

I'm trying to troubleshoot an issue with the defroster switch in my 83 300TD.

The rear defroster operates, and the light indicating that the defroster is on illuminates, but the switch does not do the courtesy glow like the other upper dash switches (when the headlights are switched on, it does not illuminate like the other switches).

I removed the switches to have a look and it only has one fiber-optic connection, whereas all the other switches have two connections. I see light coming through the fiber.

Does anyone have any ideas? Could the switch simply be bad?

Reply With Quote
  #2  
Old 10-23-2013, 04:58 PM
ImBroke's Avatar
Diesel way of Life
 
Join Date: Jun 2004
Location: Cleveland, NY
Posts: 2,230
Is this a new problem, or one that's been there for a while? IIRC, this switch should have two fibers in it.
Reply With Quote
  #3  
Old 10-23-2013, 10:14 PM
jay_bob's Avatar
Control Freak
 
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,941
Only the antenna switch gets 2 fibers since it has icons on the upper and lower half.

All the others get one fiber in the upper half only.

I would try cleaning the icons with a little rubbing alcohol and q-tips (gently). Then clean the ends of the fiber cables. Be sure to use a fresh dry q-tip to lift off the dissolved dirt and alcohol, don't let the alcohol evaporate on the surface or the dirt will still be there.

Finally put a fresh bulb in the spider and see if that helps.

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech
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




All times are GMT -4. The time now is 02:09 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page