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  #1  
Old 12-28-2002, 10:34 PM
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Question W123 Turn Signal stopped working

Hello Everyone,

A couple of days ago my turn signals quit working, then started working again--then quit again and have not been working since. Went to my good old MB CD Manual which only gives me a wiring diagram. I am pretty sure that the flasher is the little black box located between the power brake booster and the hood hinge just in front of the fuse box, but from what I understand from a friend who has another MB, that this relay works the intermittent wipers, hazard flasher and turn signals. The intermittent wiper is working fine but I have no hazard flash or turn signal. Any suggestions would be very welcome at this point.

PS already checked all of the bulbs and they seem to be fine.

Thanks,

Dave

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  #2  
Old 12-28-2002, 11:46 PM
lrg lrg is offline
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Check the emergency flasher switch on the center console. If that is between on and off or is broken it will cause your turn signals to act up. If the switch seems ok then unplug it and try the turn signals. The emergency switch is easily broken in that location(you'll note the 124 chasis has the switch moved up to the top of the console.) You may get lucky, if not then move on to the relays and flasher.
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  #3  
Old 12-29-2002, 02:23 AM
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I agree your problem is very likely your emergency flasher switch. This switch hates "Coke" or any fluid which may have gotten inside to short out the contacts.

The flasher unit is located in the centre console near the shift lever under the ash-tray.

To isolate the problem:

1) Remove the console top cover and unplug the 8-pin plug from the emerg. switch.

2) Take a loop of wire and short out contacts 49 and 30 (next to each other) on the plug. Your indicators should now work normally. If not, then the problem lies either with the flasher unit (expensive) or the ind. switch on the column.

3)The emerg. switch can be stripped right down and then cleaned thoroughly. Spring the plastic casing and the assembly can be slid out. Be most careful to make a sketch and note how to re-assemble the sliding contacts,springs etc or you will be left with a jig-saw puzzle!
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Last edited by Beagle; 12-29-2002 at 07:17 AM.
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  #4  
Old 12-29-2002, 11:50 AM
Ken Downing
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The flasher will fail from time to time.. You can get a heavy duty one from a parts house.. I think its a two prong one.. I replace them with heavy duty ones because I pull a trailer with mine often..

However you will also have the same problem if there is a burned out or loose bulb in the turn sig front or rear..

The flasher is the flasher.. It only runs the turn lights and not a lot of other stuff.. If you can get it working you can hear it and feel it work .. Thats the easy way to know if you got the right thing..



Ken
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  #5  
Old 12-29-2002, 07:34 PM
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Talking Thank you so much!!!

Hello to the 3 individuals that replied to me. Thank you so much. You radvice saved the day, it was my flasher....but not what you think.. I had pulled the center console off about a week ago to reglue a piece of wood that had broken loose where possibly the former owner was trying to pry the console with a screwdriver. In doing so I removed all the switches; therefore on reinstallation, I must not have fastened the flasher plug in good. Special thanks for the tip to jump the flasher plug #49 to #30. That is what lead me to check, and in doing so solved my problem. You may have saved me buying a new flasher.

Thanks Again - Dave
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  #6  
Old 12-29-2002, 09:51 PM
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Dave just a quick tip,pick a spare one up next time your in a breakers.Cars in salvage yards/breakers normally have sound/good flasher relays.
Bear
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  #7  
Old 05-03-2012, 10:26 PM
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excellent tip on the emergency lights. worked for me, too.
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  #8  
Old 06-06-2012, 11:31 AM
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Hi all,

I also have problems with my turn signals not working. To isolate the problem I have tried short circuiting plugs 49 & 30 in the emergency light switch and then the turn signals work perfectly. That lead me to suspect the emergency light switch was broken/dirty, so I opened and cleaned it, but no luck. To be sure I ordered a spare emergency light switch, but still no luck.

So, I have working emergency lights and no turn signal with the presumably functional emergency switch installed. With 49 & 30 jumped working turn signals.

What's the next thing to investigate?
Any suggestions welcome.

I have a C123 '84 (with the smaller hazard switch).

thanks
-david
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  #9  
Old 06-06-2012, 01:51 PM
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Same thing happened with me; every now and then my turn signals would stop working, and it hasn't been a problem since I replaced my hazard warning switch
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  #10  
Old 06-06-2012, 02:09 PM
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Found it! There was also a blown fuse. Now with the new hazard switch and replaced fuse all is good.
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  #11  
Old 06-30-2012, 09:56 PM
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Okay, when you guys say "not working" are you talking off or no indication? I turn my signal on and it flashes 2-3 times and then stops in the "on" position. Then interior light stays on and the exterior light stays on. If I turn it off and then press the emergency flasher, the flasher stays lit up as well. After a little while of this it all goes back to normal for days at a time and then acts up again. The good thing is that since it is on I can manually use the turn signal if needed.

What is the relay under the ash tray? It seems to be the one making the turn signal "noise/click" because I can barely hear it when the signals do work.
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  #12  
Old 07-09-2013, 09:06 PM
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Hey firstdiesel, did you ever figure out what the problem was. I have the same issue.
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  #13  
Old 07-30-2013, 09:42 PM
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Hi Levin, no I never did find the problem.

I took the flasher relay out from under the ash tray and took it apart. It's really easy, then I cleaned it well with electronic cleaner and cleaned off the contact point. It seemed to work for a while, but it is still hit and miss now.

Someday's it works perfectly and others it will blink 5-7 times and then just stay on. I think the only course for me right now is to just get a new relay, but I have run into transmission problems and that has taken all of my time for now.

When I get a new relay and it fixes it, I'll update the post.

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You might faint from the fight, but you're gonna find it. Every challenge could have paradise behind it. -John Popper-
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