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 10-03-2002, 04:12 PM
Registered User
 
Join Date: May 2001
Location: Las Vegas, Atlanta
Posts: 669
No Low Beams on '92 300SL

I looked at a 300SL today that has a problem: no low beams. The headlamps are new. The high beams work fine. And when the lights are switched on, all the other lights come on. Any ideas would be appreciated.
Reply With Quote
  #2  
Old 10-03-2002, 05:22 PM
Gilly's Avatar
Registered User
 
Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
I've replaced a few combi-switches on these lately. This is the turn signal switch assembly, which also controls the wipers and the high/low beam control. The other possible suspect is the exterior lamp control unit. This all assumes the bulbs are OK and the grounds are good.

Gilly
Reply With Quote
  #3  
Old 10-03-2002, 05:25 PM
Registered User
 
Join Date: May 2001
Location: Las Vegas, Atlanta
Posts: 669
Thanks for the response, Dan. Somebody (a mechanic?) told the owner that it could be a relay that is under the main fuse box. Is this the exterior lamp control unit you mention?
Reply With Quote
  #4  
Old 10-03-2002, 05:32 PM
Gilly's Avatar
Registered User
 
Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
The relay for the exterior lights is at the far back of the main fuse box, have to take off a few screws to get to it. This controls all the outputs to the exterior lamps except the center stoplamp, which is hardwired from the stop lamp switch. i believe it would take a double failure of the relay to cause this to happen (both lowbeams out). I would tend to stick with the combi-switch diagnosis.

Gilly

ps it's not an extremely expensive part to replace or hard to do. I think the relay costs alot more for the part, but of course is easier to install. I think the combi switch is in the $100-$200 range and can be done in 1 or 2 hours
Reply With Quote
  #5  
Old 10-03-2002, 05:55 PM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The HIGH beams have their own fuses & so does the LOW beam lights. When the LOW beam lights are on do the low beam fuses power up?? IF not the the combination switch is the problem. IF the fuses do power up then the lamp monitor relay would be at fault!
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #6  
Old 10-04-2002, 04:58 PM
Registered User
 
Join Date: May 2001
Location: Las Vegas, Atlanta
Posts: 669
Bad Combo Switch

No power to the low beam fuses with the light switch on. Thanks fellas.
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 04:55 AM.


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