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Yet another oddity has popped up 850

uid 53474's pic
posted by  VTexan on  Sat Oct 20 06:48 CST 2012
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last visit: Thu Jan 31 13:34 CST 2013
[RELATED]

I hopped in the 850 yesterday to head to work and noticed my dash lights were all off. That is to say all the illuminated stuff--speedometer, fuel gage, etc. I tried working the slide control to turn it up from dark to light, but it was already fully on.
At one point, they all came on for a fraction of a second, and were gone as quickly as they came on. That suggests to me a short.
Another possible clue is that I got my oil changed at one of those fast oil change places the night before the morning the lights disappeared. I'm wondering if there's a connector or something that they accidentally dislodged from where it belongs.
Anyway, If you've any suggestions, I'm all ears. Thanks!








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    Yet another oddity has popped up 850

    posted by  james_a_sousa on  Tue Oct 23 22:13 CST 2012
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    last visit: Thu Oct 23 18:51 CST 2014
    [RELATED]

    Jack - I'm glad that you love that car - you spend a lot of time with it!

    It's nice that the Brickboarders can help us out.
    --
    '96 855R,'64 PV544 driver, '67 P1800 basket case, '72 Yamaha Rd400, '68 Honda 350-4, '12 XC70, the first 5 are mine, heh, heh, 525,000 miles put on 10 bricks James A Sousa








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    Yet another oddity has popped up 850

    uid 5322's pic
    posted by  alschnertz on  Sat Oct 20 13:33 CST 2012
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    last visit: Fri Oct 24 10:32 CST 2014
    [RELATED]

    Another very common issue.
    It is most likely the rheostat.
    Can't really fix it, so grab a few at the pick-n-pull and swap it out.

    Here's what the insides look like.



    Does a rheostat really have to be this complicated?

    Edit: Yikes! Sorry about the huge photo.

    --
    "Differences of opinions should be tolerated, but not if they're too different' - Sharon Craig








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      Yet another oddity has popped up 850

      uid 53474's pic
      posted by  VTexan on  Sat Oct 20 16:57 CST 2012
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      last visit: Thu Jan 31 13:34 CST 2013
      [RELATED]

      WOW. All that just to adjust the light behind the dash??
      Does that rheostat live somewhere behind the dash...or (he said hopefully) somewhere in the engine compartment?








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        Yet another oddity has popped up 850

        posted by  KlausC on  Tue Oct 23 19:41 CST 2012
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        last visit: Fri Oct 24 10:15 CST 2014
        [RELATED]

        The switch is easier to get out in one piece if you take out the little speaker on top of the dash. That way you can get your fingers behind the switch and push it out.

        BTW, you should never have the switch on full bright. The 14V will burn out the dash bulbs.
        --
        My name is Klaus and I am a V♂lv♂holic








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          Yet another oddity has popped up 850

          uid 53474's pic
          posted by  VTexan on  Tue Oct 23 20:12 CST 2012
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          last visit: Thu Jan 31 13:34 CST 2013
          [RELATED]

          Thanks for the tips; I'll try that.
          And I gotta ask Volvo: why give that much headroom on the rheostat if it's more than your bulbs can handle? (not expecting an answer, by the way)








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        Yet another oddity has popped up 850

        uid 5322's pic
        posted by  alschnertz on  Sat Oct 20 17:45 CST 2012
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        last visit: Fri Oct 24 10:32 CST 2014
        [RELATED]

        No, it's the slider that you have been trying to adjust.
        Simply pry it out of the dashboard. Use a small screwdriver above and below and on the sides of the switch. It will slide out of the dash.
        --
        "Differences of opinions should be tolerated, but not if they're too different' - Sharon Craig







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