W114 Dash Night Lights Not Turning On - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 05-06-2014, 01:59 PM Thread Starter
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W114 Dash Night Lights Not Turning On

Hey guys, I'm curious if you guys think that the reason my backlit night light in my dash isn't illuminating when I turn on my headlights because of a defective rheostat or if there is another thing I should be looking at first?

My turn signals, high beams, handbrake, etc... lights all turn on, just not the back light.

Thanks

Last edited by sandro_bit; 05-06-2014 at 02:07 PM.
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post #2 of 5 (permalink) Old 05-06-2014, 03:25 PM
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Most likely a rheostat with dirty contacts. Spin the knob 100x and see if that helps.
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post #3 of 5 (permalink) Old 05-06-2014, 05:48 PM
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the rheostat goes bad , just remove it , and solder a wire across , and put it back in .
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post #4 of 5 (permalink) Old 05-06-2014, 08:29 PM
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Originally Posted by agillot View Post
the rheostat goes bad , just remove it , and solder a wire across , and put it back in .
Actually you don't even need to remove it. It is ceramic and there are two posts in the back, these are hollow and you can take a short (2") bit of small still wire - shove it into one and the other end in the other and the lights will be on full brightness but that was not particularly bright.

While you have it out and are checking the lights you might replace any that are burnt out.

Good Luck.
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post #5 of 5 (permalink) Old 05-08-2014, 06:52 AM Thread Starter
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Cleaned up the rheostat connections with alcohol and it worked fine. Thanks!
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