1987 Buick Riviera Night Headlights On Speedometer Light Panel Very Bright

1987 BUICK RIVIERA
110,000 MILES
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THEHEND6
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  • 3 POSTS
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?
Nov 30, 2012 at 10:53 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 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?
Nov 30, 2012 at 11:02 AM
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THEHEND6
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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.
Nov 30, 2012 at 12:36 PM
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JDL
  • ✓Experienced Mechanic
  • 16,098 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?
Nov 30, 2012 at 2:18 PM
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THEHEND6
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  • 3 POSTS
do you know how one would check if its the problem? how do i get to it? checking my manual & not finding it?
Nov 30, 2012 at 2:57 PM
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JDL
  • ✓Experienced Mechanic
  • 16,098 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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Nov 30, 2012 at 4:01 PM
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