Turn signal /indicator problem - Mercedes Benz SLK Forum

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#1 Old 01-27-2014
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Turn signal /indicator problem

Brain picking time again , guys & gals .

I'm trying to sort out a problem for a member on the national forum I'm on and need some advice from the r170 experts please .

The problem is the following :
When the indicator/turn signal is used , indifferent of which side , both sides indicators come on ( same as the hazard/emergency lights ) .

Any ideas would be appreciated !
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#2 Old 01-27-2014
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bad bulb?....


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#3 Old 01-27-2014
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Not sure if there is a relay but it almost sounds like his multi function switch is going bad.
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#4 Old 01-27-2014
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Shouldn't be a bulb as they all work , just not how they should !

What do you mean by the multi function switch ?
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#5 Old 01-27-2014
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on some model cars, when a bulb is bad, the signal will blink faster so I was just throwing that out for what it was worth. Apparently it was worth bubkis!


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#6 Old 01-27-2014
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Any and all input is always greatly appreciated !!
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#7 Old 01-27-2014
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Is there a relay switch in the R170 that may be common to the indicator stalk/lever and the "hazards" switch? Just thinking that the indicator lever switch may be either be faulty or a faulty relay is sending the signal to all sides irregardless of the indicator control lever position.

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#8 Old 01-27-2014
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A multi function switch is also called turn signal level. I woild do a search and see if there is a relay.
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#9 Old 01-27-2014
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Oh , ok , you mean the indicator stalk , could be ..

I believe the indicator relay for the pre facelift r170's ( just found out it's a 98 ) is built into the ECU , N10-3 module ?
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#10 Old 01-27-2014
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Could be a bad earth on one light unit and is going to ground through the other indicator bulbs
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#11 Old 01-27-2014
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What's exactly the connection between the PSE pump and the indicators ?

I asked the owner if he'd checked it for corrosion and he NOW tells me , that he's just bought the car , never tried the indicators before and has no PSE pump what so ever !!!

Very probable culprit , right ?
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#12 Old 01-28-2014
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Does he even know where the PSE is?
http://www.benzworld.org/forums/r170...fit-check.html


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#13 Old 01-28-2014
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Not until I told him !!
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#14 Old 01-29-2014
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only thing i'm aware of that will activate both sides is a problem with the hazzard switch!
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