How to diagnose false "bulb out" indicator? - Mercedes Benz SLK Forum

SLK R170 General Discussion SLK 200, SLK 230K, SLK 320, SLK32 AMG

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#1 Old 07-25-2015
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How to diagnose false "bulb out" indicator?

Does anybody have any DIY on identifying the faulty circuit when the " bulb out " indicator is illuminating?

I've checked all the bulbs and they're all working as expected.

I don't have a access to STAR.
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#2 Old 07-25-2015
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we have the wiring diagram if that helps?


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#3 Old 07-25-2015
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Re check your bulbs again !
They may look ok but if the filamant wire is faulty it will throw up a code .
Is it on side lights only ?
Or dip beam ?
Or ?
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#4 Old 07-25-2015
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I replaced all the bulbs and inspected and cleaned all connectors. I'm out of ideas at this point. as soon as I turn the parking lights on it comes on. I don't have to turn on the headlights.
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#5 Old 07-25-2015
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Original no plate bulbs ?
Correct wattage ?
That can do it .

Dont use cheap bulbs .
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#6 Old 07-25-2015
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Some LEDs will do it too.

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#7 Old 07-25-2015
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How embarrassing- it was the side marker bulbs.

Just goes to show... well never mind.
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