AT NIGHT WHEN HEADLIGHTS ARE ON THE SPEEDOMETER ...

  • Tiny
  • thehend6
  • 1987 Buick Riviera
  • 110,000 miles

At night when headlights are on the speedometer light panel is very bright & wont dim, and the instrument lights dont come on. What could be the problem?

Friday, November 30th, 2012 AT 6:53 PM

5 Answers

  • Tiny
  • JDL
  • Expert
  • 16,213 posts

Did you try rotating the headlamp switch knob? Usually you can dim interior lamps that way. If it won't work maybe something wrong with headlamp switch?

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Friday, November 30th, 2012 AT 7:02 PM
  • Tiny
  • thehend6
  • Member

Don't have a knob. I have replaced the whole switch & it still wont dim, I guess there is some kind of sensor in the dash maybe that is not reading that it is night time.

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Friday, November 30th, 2012 AT 8:36 PM
  • Tiny
  • JDL
  • Expert
  • 16,213 posts

For twilight sentinal, there is a photo-cell under the speaker or defrost grille. I can't be positive that the problem is the photo-cell?

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Friday, November 30th, 2012 AT 10:18 PM
  • Tiny
  • thehend6
  • Member

Do you know how one would check if its the problem? How do I get to it? Checking my manual & not finding it?

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Friday, November 30th, 2012 AT 10:57 PM
  • Tiny
  • JDL
  • Expert
  • 16,213 posts

I'm not up to speed on your model year. I can just tell you according to our database. If you have twilight sentenal? For the photo-cell, our data base just says center of dash.

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Saturday, December 1st, 2012 AT 12:01 AM

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