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Thread: Dash lights dim with headlights

  1. #1
    1st Gen 1st Gen's Avatar
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    Jan 2006
    Vancouver WA
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    Dash lights dim with headlights

    Not a lot of activity in this part of the forum.
    Our 2006 3 Hatch has this annoying problem of dimming the dash lights when you turn on the head lights. It's not a problem at night but in low visibility conditions during daytime driving I can't see the instrument panel. Yes, I turned the adjustment all the way up but it's still too dim.
    1991 Protege LX with GTX swap, DD
    1990 4WD Protege with GTX swap, Project/garage decoration
    2006 Mazda 3 with 2.3, Her car
    1980 Ford F100 Short bed with 300ci 6 cylinder, work truck/home for moss

  2. #2
    Registered User
    Join Date
    Aug 2014
    Southern Tier NY
    Feedback Score
    Bad alternator or battery? Turning on the headlights puts a load on the electrical system and the voltage is probably dropping a bit too much. If you have a voltmeter you can check the voltage before and after you turn on the lights.
    2000 Mercury Sable LS Premium Wagon, 3.0L DOHC (my daily driver)
    2003 Mazda Protege5, 2.0L (daughter's daily driver)
    2004 Ford Freestar SEL, 4.2L (kid's beater-mobile)
    2008 Nissan Titan SE, Crew Cab, Long Bed, 5.6L (hauler of stuff)
    2012 Camry LE, 2.4L (wife's daily driver)

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