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Old 09-20-2010, 01:00 PM
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Join Date: Apr 2010
Posts: 16
W115 Turn Signal Not Working

So far the longest time my turn signals had the 'fast blink', Im guessing this meant the relay was going out and finnally it did because the turn signals ceased to work.

So I bought a new relay, my year (70) for the 220D shares the relay for the 'hazard lights' located directly behind the red hazard knob. After installing the new relay I still am not getting a working turn signals but instead get a weird buzzing noise coming from this new relay when I attempt to use the turn signal.

Any ideas what the 'buzzing' means. Could it be a short somewhere? Checked fuse and it checks okay.


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Old 09-20-2010, 02:11 PM
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Join Date: Feb 2000
Location: Rancho PV, CA, USA
Posts: 328
I would check all the ground points, could be some corrosion.
1960 220 SE Coupe (Ponton)
1999 E320 Wagon
2007 E350
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Old 09-20-2010, 05:00 PM
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Where would the ground points be?
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Old 09-20-2010, 05:07 PM
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Location: Tucson, AZ
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One of the major grounds for the W114 is the brace behind the center console. Check for corrosion or loose connections at the console mounting and at either end of the brace where it attaches to the transmission tunnel or the dash. There should be a large eyelet with three or four wires leading to various components.
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Old 09-20-2010, 05:21 PM
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I see, thanks Ill check it out.
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Old 09-21-2010, 12:25 AM
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Join Date: Feb 2008
Posts: 96
Hi Sean, my 220D will buzz and not work on the right turns, sometimes. The problem for my car is in the switch for the turn stalk. Spraying a contact cleaner into the switch fixes the problem for a few months. Ron
1971 220D, daily driver, new paint, 142K
1973 220D, low compression
1975 300D, back on the road! 166K
1971 220D, salvage, rear hit, engine excellent
1972 250, bad cam, but runs!
1971 230, engine stuck
1971 220D, low compression, rusty
1976 240D, salvage, engine excellent
1966 230SL, water in oil after rebuild
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Old 09-21-2010, 10:13 AM
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Join Date: Mar 2003
Location: Central Ky
Posts: 6,230
fast blink could have meant one or more bad bulbs, have you checked those and the sockets they go into, could be corrosion not allowing contact or ground as suggested

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