SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: Calling all brains, low voltage in fuses 12+13 no idea why (99 Sl600)

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Mar 28, 2023 | 07:10 PM
  #1  
Badwlf99's Avatar
Thread Starter
Newbie
 
Joined: Jul 2022
Posts: 11
Likes: 3
1999 SL600
Calling all brains, low voltage in fuses 12+13 no idea why (99 Sl600)

Hello, I've never had working wipers or been able to flash my brights, any attempt to do so usually made my turn signals go on the fritz, I have replaced the combination relay, convenience relay, turn signal stalk etc, and it hasn't made a difference. Searching for the issue revealed that I have low voltage to fuses 12 and 13 and the M1 fuse. But I have no idea why.

If I jumper the fuse from a fully powered fuse the brights flash but I still can't work the wipers. Any idea why? I'm kinda at a loss.
Reply
Old Mar 29, 2023 | 01:57 AM
  #2  
Frank_S500's Avatar
Member
15 Year Member
 
Joined: Aug 2006
Posts: 212
Likes: 25
SL63 (R230), CL500 (C215), SL55 (R129), CE300-24 Cabrio (A124)
Hi, xxx
Bad ground connection? Bad GM? I would check the circuit diagrams..
Cheers, Frank
Reply
Old Mar 29, 2023 | 12:27 PM
  #3  
Badwlf99's Avatar
Thread Starter
Newbie
 
Joined: Jul 2022
Posts: 11
Likes: 3
1999 SL600
Thanks for the reply! I did eventually crack it, thankfully I have a 500 to check parts on and drive on worse weather days. I found an old thread on another site that said it might be the ignition switch so I swapped the ignition switch from the 600 into the 500 and the 500 now has those same problems! installed the switch into the 600 and am going to put it all back together today.
Reply
Old Mar 30, 2023 | 03:54 AM
  #4  
Frank_S500's Avatar
Member
15 Year Member
 
Joined: Aug 2006
Posts: 212
Likes: 25
SL63 (R230), CL500 (C215), SL55 (R129), CE300-24 Cabrio (A124)
thanks for the feedback.
Reply
Old Jun 5, 2023 | 02:47 PM
  #5  
Benz Tech's Avatar
Newbie
 
Joined: Jun 2023
Posts: 2
Likes: 0
93' 600sl
Carbon parts

Hey I saw your comment on a r129 post inquiring about carbon fenders. I can make a custom aet for you. Do you have instagram? You can check out my page and we can talk there. @benzhawaii
Reply
Old Jun 5, 2023 | 02:50 PM
  #6  
Benz Tech's Avatar
Newbie
 
Joined: Jun 2023
Posts: 2
Likes: 0
93' 600sl
Sorry I'm on my old phone that doesn't have my email for my mbworld account, I can comment here soon on my normal account, I just saw your comment and wanted to get in touch while I had the free time. I'll be here as well if you dont have instagram and had any questions. You can still check out my page www.instagram.com/benzhawaii
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 10:29 AM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE